Omega Contracting Fraud Trial Moves Forward

Prosecutors are moving forward with the Omega Contracting LLC fraud trial.  Omega Contracting is one of the many "storm chaser" roofing companies working on the May 2010 hail storm that hit Northern Virginia.   Omega is located in Manassas, VA. Reviews of Omega Contracting LLC are expected.

Last month police arrested employees of Omega Contracting LLC on theft and fraud charges.  They did not have to go far to find these men.  Seems they were living in the Prince William County jail.  These men were living in the jail and would go out daily on a work release program.

Omega Contracting operates a fleet of trucks which are given to these inmates each morning for them to visit local homeowners to inquire about roofing repairs and other remodeling jobs.  One of the teams allegedly got caught stealing blank checks while on work release and then cashing these checks.

Miscellaneous Siding Issues

Cleaning Vinyl Siding
Vinyl siding resists most common household stains, but it will
become dirty like any product exposed to atmospheric
conditions. In areas not exposed to direct sun and rain,
periodic washing with a soft bristle brush and clean water
from a garden hose may be necessary to remove surface dirt.
Chalk may also accumulate on the surface. This is a normal
condition for pigmented materials exposed to the elements.
For the best appearance, clean vinyl siding at least once a
year.
To remove soil, grime and chalk from siding, use a garden
hose, a soft bristle brush, and a bucket of soapy water. (You
can also use the solution described below in the section
dealing with mildew.) To minimize streaking, wash the
house from the bottom up.
Thoroughly rinse the siding with clean water from a garden
hose. Avoid prolonged or high pressure rinsing of open
ventilated areas. Keep cleaning solution off surrounding
fixtures and surfaces not scheduled for washing.
NOTE: We do not recommend power washing vinyl or
polymer siding as it can cause moisture intrusion,
damage, and/or discoloration.
Stubborn stains
If you can’t remove especially stubborn stains using normal
household detergents, request a cleaner from your siding
contractor or your local building materials retailer. Always test
any cleaner on an inconspicuous area before full use.
Mildew
Mildew may be a problem in some areas, especially warmer
climates with consistently high humidity. Mildew appears as
black spots on surface dirt and is usually detected in areas not
subjected to rainfall, such as under eaves and porch
enclosures. To remove mildew, prepare a solution as follows:
1/2 cup detergent (Tide, for example)
2/3 cup trisodium phosphate (Soilax, for example)
1 quart 5% sodium hypochlorite (Chlorox, for example)
3 quarts water
CAUTION: Greater concentration may cause damage to
the siding and soffit.
If the above solution does not readily remove mildew spots,
ask your siding contractor or your local building materials
retailer for a mildew cleaner.
135
CertainTeed Vinyl Siding Installation Guide
SECTION 11 – Miscellaneous
Siding over Asbestos
Vinyl siding retrofit over asbestos
This is a recommendation from the Vinyl Siding Institute after
discussions with Federal EPA officials. Because local
regulations supersede federal regulations, local EPA officials
should be contacted in the area where the work is being done.
The most desirable practice is not to disturb the existing
siding on the home. Apply sheathing over the existing
asbestos siding, and then apply vinyl siding over the top of the
sheathing. The sheathing will serve to flatten the wall and also
retain any breakage of the cement asbestos siding. Nails
should be long enough to penetrate through the sheathing
and existing asbestos siding and into the wall studs.
If there is a need to level or flatten a wall, apply furring strips
over the sheathing.
In the case where the homeowner wants the existing cement
asbestos siding removed completely, removal should be done
by a professionally trained asbestos removal crew.
Please note that some jurisdictions require all asbestos
removal to be performed by a trained asbestos removal crew.
Historic Restoration
Vinyl Siding Institute recommended guidelines
If a building is in an historic area or has been designated an
historic building, be certain that approval for the use of vinyl
siding has been obtained from the local historic society. This
applies to building additions as well.
Before proceeding to re-side an historic building, the building
should be examined for moisture, insect infestation, structural
defects and other problems which may be present. These
problems should be addressed and the building pronounced
“healthy” before re-siding with any material.

Do not damage or remove the original siding. If at all possible,
do not alter the original structure so that the application of
vinyl siding is reversible (i.e. the original would remain intact
and some time in the future, if desired, the vinyl siding could
be removed). Exception: “In cases where a non-historic
artificial siding has been applied to a building, the removal of
such a siding before the application of vinyl siding would, in
most cases, be acceptable.” (Preservation Briefs, Number 8 -
U.S. Dept. of the Interior - 1984)

136
CertainTeed Vinyl Siding Installation Guide

Exercise every care to retain architectural details wherever
possible. Do not remove, cover, or add details until you have
the building owner’s written approval. Determine that the
owner has consulted the local historic society regarding the
foregoing.

Use siding which closely approximates the appearance of the
original siding in color, size and style.

For More Information

These instructions will enable you to successfully complete a
siding, soffit, or porch ceiling installation. However, no set of
instructions can answer every question or problem that might
come up during a project. So if you are in doubt about how to
complete a specific procedure, we suggest you try two
avenues of help:

First, call or visit your building materials supplier. You should
be able to find someone with the know-how and experience to
answer your question or solve your problem.

Second, if you need additional help, call us at 1-800-233-8990.
Our Sales Support Group is always ready to help you.

This installation manual is updated periodically. The most
current information will always be posted on our website:
www.certainteed.com.

Repair of Siding

Replacing a Damaged Siding Panel

To remove a damaged panel, insert the hook end of a zip tool
into the lock between the damaged panel and the panel
above. Pull downward. This will allow access to the damaged
panel’s nail flange. Remove the nails securing the panel.
The nails may be allowed to stay in the wall if they are driven
flush with the substrate after the damaged panel is removed.
Remove the damaged panel and install a new panel. Then use
the zip tool to lock the new panel into the panel above.

Replacing a Damaged
Outside Cornerpost

Remove the face portion of the damaged post by scoring along
the outside corner of the receiving channel with a utility knife. It
may be easier if you first cut away part of the face of the outside
cornerpost to get better access to make these cuts.

Remove the nailing flanges from the new cornerpost by
scoring and bending until the flanges snap off. Be sure to
score along the inner corner of the receiving channel.

Lap the partial receiving channel of the new post over the
partial channel on the remaining nail flange. Pop rivet the two
receiving channel legs together as needed.

133
CertainTeed Vinyl Siding Installation Guide
SECTION 10 – Repair
Repairing Buckled Siding at the Joist

Vinyl siding sometimes becomes buckled between the first
and second floors of a newly built siding installation due to
settling and shrinkage of wet lumber and some framing
practices. Using “engineered” lumber for the joist greatly
reduces the chances of shrinkage and settling and can help
prevent buckling of siding. If, however, you do have a building
with this situation, here is a way to correct the problem using
aluminum starter strip.

With a zip-lock tool, unlock the buckled panel from the panel
below by inserting the hooked end of the tool behind the
return leg of the buckled panel until the hook catches. Pull
down and “unzip” the panel.

Insert an inverted scrap piece of starter strip into the exposed
receiving lock of the lower panel.

With the scrap piece inserted into the lock, lay the upper panel
over the starter strip. The starter strip should be visible behind
the upper panel. Mark a line on the scrap piece where the
return leg of the upper panel meets the scrap piece.
Trim the starter on this line, saving the portion with the locking
edge.

NOTE: Cut the starter strip in short lengths to ease
handling and relocking.

Insert the trimmed edge into the lock of the lower panel. Begin
at one end and, using a zip-lock tool, pull the return leg of the
upper panel down to engage the upper panel with the
aluminum starter strip.

Installing Specific CertainTeed Products

D7" Straight Edge Perfection
Shingles
Important
This product is not designed for roof application. It is designed
solely for installation on vertical surfaces.
Panels must be installed with nails over a solid substrate with
nail holding strength such as plywood, oriented strand board,
or existing wood siding (minimum 7/16" thick). This product
cannot be installed with staples.
NOTE: Each panel must be nailed through the round hole
in the center of the nail hem to control the direction of
normal expansion and contraction. If you are installing a
partial panel and the center nail hole has been cut off, drill
a nail hole in the center of the nail hem of the cut panel
and nail through it.
Panel Spacing at Different Temperatures
As with any plastic siding, Cedar Impressions® expands and
contracts with changes in temperature. For this reason, it is
important that you space the panels according to the panel
temperature at the time of installation. Failure to provide the
proper spacing according to these temperature ranges may
result in gaps that are too large or too small, thereby creating the
potential for side locking tabs disengaging, panel distortion, or
buckling. Spacing of panels previously installed at a different
temperature does not require adjustment.
Each panel has a patented PanelThermometer™ that displays
panel temperature and indicator lines that serve as guides for
proper spacing between the panels. The PanelThermometer is
located on the upper right-hand corner of the panel; the
indicator lines are on the upper left-hand corner.
Note that the panel temperature may change throughout the
day. Space the panels according to the panel temperature at
the time of installation.
The cells on the PanelThermometer will change color to
indicate the temperature of the panel.
NOTE: If two temperature cells on the PanelThermometer
show a color change, use the brighter color as the
indicator.
PanelThermometer Temperature
Reading Indicator Lines
0 Set to 0 line
30 Set to 30 line
65 Set to 65 line
100 Set to 100 line
130 Set to 130 line
160 Butt panels tight
SECTION 8 – Installing Specific CertainTeed Products
panel
temperature
indicator
lines
If the brightest cell is between the numbered temperature cells,
position the panel between the corresponding temperature
indicator lines. Example: If the PanelThermometer reads 65,
align the second panel to the 65 temperature indicator line on
the first panel. If the cell between the 65 and 100 is brighter,
position the panel between the 65 and 100 temperature
indicator lines.
First course
Strike a level line around the house and install Metal Starter.
If you plan to use Cedar Impressions Mitered Cornerpost,
make sure the starter strip is installed to the edge of the
corner. An alternative method of starting Cedar Impressions
is to use J-channel in place of starter strip to receive the
bottom edge of the panel.
Cut 2" off the top course of the panel at indicator “A,” which is
located above the nail slots.
Starting on the right side of the wall, hook the bottom locking
leg of the panel into the starter strip and slide the panel into
the cornerpost or receiving channel. Leave 1/4" space
between the panel and the corner for expansion. If you are
planning to install the Mitered Cornerpost, space the panel 3"
from the corner.
Fasten the panel to the wall by first nailing through the round
center hole in the nailing hem at the top of the panel. Continue
nailing the panel with 5 nails: one in the right-end nail slot and
one at each of the QuickReference™ Nail Mark Indicators.
Leave 1/8" to 1/16" between the nail heads and the panel to
allow freedom of movement during normal expansion and
contraction.
Install the next panel by positioning it below the starter strip
and next to the first panel. Push in and up to lock the panel
into the starter strip and the side tabs of the first panel. Space
the second panel according to the panel temperature at the
corresponding temperature indicator lines.
Nail the panel into position starting with the round center hole
and then placing the next nail in the right-end nail slot (which
overlaps the previous panel’s left-end slot) so that the nail
goes through both panels’ nail slots simultaneously. Continue
nailing the rest of the panel as described earlier.
Continue to install the remaining panels of the first course as
described earlier.
CertainTeed Vinyl Siding Installation Guide
85
2"
“A”
QuickReference
Nail Mark Indicators
1/4"
1/4"
Second course
Cut 23-1/2" off of the right side of the D7 shingle at indicator
“B,” which is located above the nail slots, cutting straight
through the panel. Drill a 3/16" hole in the center of the nail hem
and nail the siding through this hole to control the direction of
expansion and contraction. Another option is to nail each end of a
nail slot located at the center of the panel.
Set the spacing using the PanelThermometer and temperature
indicator lines and install the remaining panels.
Continue to stagger the panel courses, alternating each time
to ensure a random shingle pattern up the wall.
Installing under a window or opening
Install Cedar Impressions undersill trim. Cut the panel to fit
under the window. Drill a 3/16" hole in the center of the nail
hem. Using a snap lock punch, raise tab faces on
the outside of the panel 1/4" from the trimmed edge, 6" apart.
Lock the panel into the previous course, and center nail the
siding through the 3/16" hole drilled earlier. (Center nailing
controls the direction of the panel’s expansion and contraction.)
Lock the panel into place.
Installing over a window or opening
Cut the panel to fit over the window by measuring from the
locking tab of the previous row to the bottom of the receiving
pocket. Add 1/8" to this measurement. Turn the panel over
and, using this measurement, measure from the bottom of the
return leg. Cut the panel to this dimension.
Install the cut panel by positioning the panel over the window
and into the receiving pocket. Lock the cut panel into the
previous course by pushing in and up. The cut edge should be
1/4" below the top of the receiving pocket.
Finishing the top course
To finish the top course of siding, attach cornice receiver to the
top of the wall under the eave or soffit. Trim the top panel to
within 1/4" of the cornice receiver. Using a nail slot punch,
punch nail slots 1/4" from the trimmed edge, 16" apart. Nail off
the top course and snap the cornice molding into the cornice
receiver.
Installing Cedar Impressions Mitered Cornerpost
If you are planning to install Mitered Cornerposts, space the
siding panel 3" from the edge of the corner. Lock the first
corner over the siding, making sure it also locks into the
starter strip. Nail the corner through the top two nail slots.
86
CertainTeed Vinyl Siding Installation Guide
cedar
impressions panel
cornice
molding
cornice receiver
1/4"
1/4"
back side of panel to be cut
bottom of
return leg
window
cedar impressions
undersill trim
cedar impressions
family panel
drill 3/16" dia. hole at midpoint
of remaining panel 23-1/2"
“B”
bottom of
receiving channel
measure from
the locking tab
to the bottom
of the receiving
channel and
add 1/8"
bottom of
locking tab
T5" Straight Edge Perfection Shingles
Important
These products are not designed for roof application. They are
designed solely for installation on vertical surfaces.
Panels must be installed with nails over a solid substrate with
nail holding strength such as plywood, oriented strand board,
or existing wood siding (minimum 7⁄16" thick). This product
cannot be installed with staples.
NOTE: Each panel must be nailed through the round hole
in the center of the nail hem to control the direction of
normal expansion and contraction. If you are installing a
partial panel and the center nail hole has been cut off, drill
a nail hole in the center of the nail hem of the cut panel
and nail through it.
Panel Spacing at Different Temperatures
As with any plastic siding, Cedar Impressions expands and
contracts with changes in temperature. For this reason, it is
important that you space the panels according to the panel
temperature at the time of installation. Failure to provide the
proper spacing according to these temperature ranges may
result in gaps that are too large or too small, thereby creating
the potential for side lock tabs disengaging, panel distortion,
or buckling. Spacing of panels previously installed at a
different temperature does not require adjustment.
Each panel has a patented PanelThermometer™ that displays
panel temperature and indicator lines that serve as guides for
proper spacing between the panels. The PanelThermometer is
located on the upper right-hand corner of the panel; the
indicator lines are on the upper left-hand corner.
Note that the panel temperature may change throughout the
day. Space the panels according to the panel temperature at
the time of installation.
The cells on the PanelThermometer will change color to
indicate the temperature of the panel.
NOTE: If two temperature cells on the PanelThermometer
show a color change, use the brighter color as the
indicator.
CertainTeed Vinyl Siding Installation Guide
87
panel
temperature
indicator
lines
PanelThermometer Temperature
Reading Indicator Lines
0 Set to 0 line
30 Set to 30 line
65 Set to 65 line
100 Set to 100 line
130 Set to 130 line
160 Butt panels tight
If the brightest cell is between the numbered temperature
cells, position the panel between the corresponding
temperature indicator lines. Example: If the
PanelThermometer reads 65, align the second panel to the 65
temperature indicator line on the first panel. If the cell between
the 65 and 100 is brighter, position the panel between the 65
and 100 temperature indicator lines.
First course
Strike a level line around the house and install Metal Starter
Strip. If you plan to use Cedar Impressions Mitered
Cornerposts, make sure the starter strip is installed to the
edge of the corner. An alternative method of starting Cedar
Impressions is to use J-channel in place of starter strip to
receive the bottom edge of the panel.
Create a straight edge on the right side of the panel by cutting
the top two shingles so they are flush with the bottom shingle.
Cut 4" off the top course of the panel at indicator “A,” which is
located above the nail slots.
Starting on the right side of the wall, hook the bottom locking
leg of the panel into the starter strip and slide the panel into
the cornerpost or receiving channel. Leave 1/4" space
between the panel and the corner for expansion. If you are
planning to install the Mitered Cornerpost, space the panel
3" from the corner.
88
CertainTeed Vinyl Siding Installation Guide
4"
Cut 4"
off the top
shingle and
cut through
to form a
straight edge
1/4"
“A”
Fasten the panel to the wall by first nailing through the round
center hole in the nailing hem at the top of the panel. Continue
nailing the panel with 5 nails: one in the right-end nail slot and
one at each of the QuickReference™ Nail Mark Indicators.
Leave 1/8" to 1/16" between the nail heads and the panel to
allow freedom of movement during normal expansion and
contraction.
Install the next panel by positioning it below the starter strip
and next to the first panel. Push in and up to lock the panel
into the starter strip and the side tabs of the first panel. Space
the second panel according to the panel temperature at the
corresponding temperature indicator lines.
Nail the panel into position starting with the round center hole
and then placing the next nail in the right-end nail slot (which
overlaps the previous panel’s left-end slot) so that the nail
goes through both panels’ nail slots simultaneously. Continue
nailing the rest of the panel as described above.
Continue to install the remaining panels of the first course as
described.
Second course
Cut 30" off of the right side of the T5 shingle at indicator “B,”
which is located above the nail slots, cutting straight through
the panel. Drill a 3/16" hole in the center of the nail hem and
nail the siding through this hole to control the direction of
expansion and contraction. Another option is to nail each end
of a nail slot located at the center of the panel.
Set the spacing using the PanelThermometer and temperature
indicator lines and install as described.
Continue to stagger panel courses, alternating each time to
ensure a random shingle pattern up the wall.
Installing Cedar Impressions Mitered Cornerposts
If you are planning to install Mitered Cornerposts, space the
siding panel 3" from the edge of the corner. Lock the first
corner over the siding, making sure it also locks into the
starter strip. Nail the corner through the top two nail slots.
CertainTeed Vinyl Siding Installation Guide
89
1/4"
30"
drill 3/16" diameter
hole at midpoint of
remaining panel
remove 30" off
the right side
“B”
QuickReference
Nail Mark Indicators
Installing under a window or opening
Install Cedar Impressions undersill trim. Cut the panel to fit
under the window. Drill a 3/16" hole in the center of the nail
hem. Using a snap lock punch, raise tab faces on the outside
of the panel 1/4" from the trimmed edge, 6" apart. Lock the
panel into the previous course, and center nail the siding
through the 3/16" hole drilled earlier. (Center nailing controls
the direction of the panel’s expansion and contraction.) Lock
the panel into place.
Installing over a window or opening
Cut the panel to fit over the window by measuring from the
locking tab of the previous row to the bottom of the receiving
pocket. Add 1/8" to this measurement. Turn the panel over
and, using this measurement, measure from the bottom of the
return leg. Cut the panel to this dimension.
Install the cut panel by positioning the panel over the window
and into the receiving pocket. Lock the cut panel into the
previous course by pushing in and up. The cut edge should be
1/4" below the top of the receiving pocket.
Finishing the top course
To finish the top course of siding, attach cornice receiver to
the top of the wall under the eave or soffit. Trim the top panel
to within 1/4" of the cornice receiver. Using a nail slot punch,
punch nail slots 1/4" from the trimmed edge of the siding
panel, 16" apart. Nail off the top course, and snap the cornice
molding into the cornice receiver.
If you are installing cornice molding with Mitered Cornerposts,
review the instructions for installing Cornice Cap with Mitered
Cornerpost (pages 101-102).
90
CertainTeed Vinyl Siding Installation Guide
window
cedar impressions
undersill trim
cedar impressions
family panel
cedar
impressions panel
cornice
molding
cornice receiver
1/4"
1/4"
back side of panel to be cut
bottom of
return leg
bottom of
receiving channel
measure from
the locking tab
to the bottom
of the receiving
channel and
add 1/8"
bottom of
locking tab
D9" Staggered Rough-Split Shakes
Important
This product is not designed for roof application. It is designed
solely for installation on vertical surfaces.
Panels must be installed with nails over a solid substrate with
nail holding strength such as plywood, oriented strand board,
or existing wood siding (minimum 7/16" thick). This product
cannot be installed with staples.
NOTE: Each panel must be nailed through the round hole
in the center of the nail hem to control the direction of
normal expansion and contraction. If you are installing a
partial panel and the center nail hole has been cut off, drill
a nail hole in the center of the nail hem of the cut panel
and nail through it.
Panel Spacing at Different Temperatures
As with any plastic siding, Cedar Impressions® expands and
contracts with changes in temperature. For this reason, it is
important that you space the panels according to the panel
temperature at the time of installation. Failure to provide the
proper spacing according to these temperature ranges may
result in gaps that are too large or too small, thereby creating
the potential for side lock tabs disengaging, panel distortion,
or buckling. Spacing of panels previously installed at a
different temperature does not require adjustment.
Each panel has a patented PanelThermometer™ that displays
panel temperature and indicator lines that serve as guides for
proper spacing between the panels. The PanelThermometer is
located on the upper right-hand corner of the panel; the
indicator lines are on the upper left-hand corner.
Note that the panel temperature may change throughout the
day. Space the panels according to the panel temperature at
the time of installation.
The cells on the PanelThermometer will change color to
indicate the temperature of the panel.
NOTE: If two temperature cells on the PanelThermometer
show a color change, use the brighter color as the
indicator.
PanelThermometer Temperature
Reading Indicator Lines
0 Set to 0 line
30 Set to 30 line
65 Set to 65 line
100 Set to 100 line
130 Set to 130 line
160 Butt panels tight
CertainTeed Vinyl Siding Installation Guide
91
panel
temperature
indicator
lines
If the brightest cell is between the numbered temperature cells,
position the panel between the corresponding temperature
indicator lines. Example: If the PanelThermometer reads 65,
align the second panel to the 65 temperature indicator line on
the first panel. If the cell between the 65 and 100 is brighter,
position the panel between the 65 and 100 temperature
indicator lines.
First course
Strike a level line around the house and install Metal Starter
Strip. If you plan to use Mitered Cornerpost, make sure the
starter strip is installed to the edge of the corner. An
alternative method of starting Cedar Impressions is to use
J-channel in place of starter strip to receive the bottom edge
of the panel.
Create a straight edge on the right side of the panel by cutting
the top shingle so it is flush with the bottom shingle. Cut 2"
off the top course of the panel at indicator “A,” which is
located above the nail slots.
Starting on the right side of the wall, hook the bottom locking
leg of the panel into the starter strip and slide panel into the
cornerpost or receiving channel. Leave 1/4" space between
the panel and the corner for expansion. If you are planning to
install the Mitered Cornerpost, space the panel 3" from the
corner.
Fasten the panel to the wall by first nailing through the round
center hole in the nailing hem at the top of the panel. Continue
nailing the panel with 5 nails: one in the right-end nail slot and
one at each of the QuickReference™ Nail Mark Indicators.
Leave 1/8" to 1/16" between the nail heads and the panel to
allow freedom of movement during normal expansion and
contraction.
Install the next panel by positioning it below the starter strip
and next to the first panel. Push in and up to lock the panel
into the starter strip and the side tabs of the first panel. Space
the second panel according to the panel temperature at the
corresponding temperature indicator lines.
Nail the panel into position starting with the round center hole
and then placing the next nail in the right-end nail slot (which
overlaps the previous panel’s left-end slot) so that the nail
goes through both panels’ nail slots simultaneously. Continue
nailing the rest of the panel.
Continue to install remaining panels of first course as
described earlier.
92
CertainTeed Vinyl Siding Installation Guide
1/4"
2"
QuickReference
Nail Mark Indicators
1/4"
“A”
Second course
Cut 29" off of the right side of the D9 shakes at indicator
“B,” which is located above the nail slots, cutting straight
through the panel. Drill a 3/16" hole in the center of the nail
hem and nail the siding through this hole to control direction of
expansion and contraction. Another option is to nail each end
of a nail slot located at the center of the panel.
Set the spacing using the PanelThermometer and temperature
indicator lines and install the panel as described earlier.
Continue to stagger panel courses, alternating each time to
ensure a random shingle pattern up the wall.
Installing under a window or opening
Install Cedar Impressions undersill trim. Cut the panel to fit
under the window. Drill a 3/16" hole in the center of the nail
hem. Using a snap lock punch, raise tab faces on the outside
of the panel 1/4" from the trimmed edge, 6" apart. Lock the
panel into the previous course, and center nail the siding
through the 3/16" hole drilled earlier. (Center nailing controls
the direction of the panel’s expansion and contraction.) Lock
the panel into place.
Installing over a window or opening
Cut the panel to fit over the window by measuring from the
locking tab of the previous row to the bottom of the receiving
pocket. Add 1/8" to this measurement. Turn the panel over
and, using this measurement, measure from the bottom of the
return leg. Cut the panel to this dimension.
Install the cut panel by positioning the panel over the window
and into the receiving pocket. Lock the cut panel into the
previous course by pushing in and up. The cut edge should be
1/4" below the top of the receiving pocket.
CertainTeed Vinyl Siding Installation Guide
93
29"
drill 3/16" dia. hole at
midpoint of remaining panel
window
cedar impressions
undersill trim
cedar impressions
family panel
“B”
bottom of
receiving channel
back side of panel to be cut
measure from
the locking tab
to the bottom
of the receiving
channel and
add 1/8"
bottom of
locking tab bottom of
return leg
Finishing the top course
To finish the top course of siding, attach cornice receiver to
the top of the wall under the eave or soffit. Trim the top panel
to within 1/4" of the cornice receiver. Using a nail slot punch,
punch nail slots 1/4" from the trimmed edge, 16" apart. Nail
off the top course and snap the cornice molding into the
cornice receiver.
Installing Cedar Impressions Mitered Cornerpost
Install the siding on both sides of the wall before you install
the cornerpost. Space the siding 3" from the edge of the
corner. The corners are designed to fit over the panels that
are used to start a new course. Lock the first corner over the
siding, making sure it also locks into the starter strip. The top
of the corner must be in line with the top of the panel. Nail the
corner through the top two nail slots.
The right-side corner gap has cut marks at 1/8" increments;
they allow you to fit the corner to the different panel heights
you may encounter as you finish a course. Trim the corner gap
as needed to fit the panel.
To finish the top of the cornerpost with cornice molding and
cornice cap, see page 101-102.
94
CertainTeed Vinyl Siding Installation Guide
cedar
impressions panel
cornice
molding
cornice receiver
1/4"
1/4"
trim as
needed
to fit corner
D7" Straight Edge Rough-Split Shakes
Important
This product is not designed for roof application. It is designed
solely for installation on vertical surfaces.
Panels must be installed with nails over a solid substrate with
nail holding strength such as plywood, oriented strand board,
or existing wood siding (minimum 7/16" thick). This product
cannot be installed with staples.
NOTE: Each panel must be nailed through the round hole
in the center of the nail hem to control the direction of
normal expansion and contraction. If you are installing a
partial panel and the center nail hole has been cut off, drill
a nail hole in the center of the nail hem of the cut panel
and nail through it.
Panel Spacing at Different Temperatures
As with any plastic siding, Cedar Impressions® expands and
contracts with changes in temperature. For this reason, it is
important that you space the panels according to the panel
temperature at the time of installation. Failure to provide the
proper spacing according to these temperature ranges may
result in gaps that are too large or too small, thereby creating the
potential for side locking tabs disengaging, panel distortion, or
buckling. Spacing of panels previously installed at a different
temperature does not require adjustment.
Each panel has a patented PanelThermometer™ that displays
panel temperature and indicator lines that serve as guides for
proper spacing between the panels. The PanelThermometer is
located on the upper right-hand corner of the panel; the
indicator lines are on the upper left-hand corner.
Note that the panel temperature may change throughout the
day. Space the panels according to the panel temperature at
the time of installation.
The cells on the PanelThermometer will change color to
indicate the temperature of the panel.
NOTE: If two temperature cells on the PanelThermometer
show a color change, use the brighter color as the
indicator.
PanelThermometer Temperature
Reading Indicator Lines
0 Set to 0 line
30 Set to 30 line
65 Set to 65 line
100 Set to 100 line
130 Set to 130 line
160 Butt panels tight
CertainTeed Vinyl Siding Installation Guide
95
panel
temperature
indicator
lines
If the brighter cell is between the numbered temperature cells,
position the panel between the corresponding temperature
indicator lines. Example: If the PanelThermometer reads 65,
align the second panel to the 65 temperature indicator line on
the first panel. If the cell between the 65 and 100 is brighter,
position the panel between the 65 and 100 temperature
indicator lines.
First course
Strike a level line around the house and install Metal Starter.
If you plan to use Cedar Impressions Mitered Cornerpost,
make sure the starter strip is installed to the edge of the corner.
An alternative method of starting Cedar Impressions is to use
J-channel in place of starter strip to receive the bottom edge of
the panel.
Cut 2" off the top course of the panel at indicator “A,” which is
located above the nail slots.
Starting on the right side of the wall, hook the bottom locking
leg of the panel into the starter strip and slide the panel into
the cornerpost or receiving channel. Leave 1/4" space
between the panel and the corner for expansion. If you are
planning to install the Mitered Cornerpost, space the panel 3"
from the corner.
Fasten the panel to the wall by first nailing through the round
center hole in the nailing hem at the top of the panel. Continue
nailing the panel with 5 nails: one in the right-end nail slot and
one at each of the QuickReference™ Nail Mark Indicators.
Leave 1/8" to 1/16" between the nail heads and the panel to
allow freedom of movement during normal expansion and
contraction.
Install the next panel by positioning it below the starter strip
and next to the first panel. Push in and up to lock the panel
into the starter strip and the side tabs of the first panel, as
shown in figure 5. Space the second panel according to the
panel temperature at the corresponding temperature indicator
lines.
Nail the panel into position starting with the round center hole
and then placing the next nail in the right-end nail slot (which
overlaps the previous panel’s left-end slot) so that the nail
goes through both panels’ nail slots simultaneously. Continue
nailing the rest of the panel as described above.
Continue to install remaining panels of first course as
described above.
96
CertainTeed Vinyl Siding Installation Guide
2"
1/4"
QuickReference
Nail Mark Indicators
1/4"
“A”
Second course
Cut 28-1/2" off of the right side of the D7 shakes at indicator
“B,” which is located above the nail slots, cutting straight
through the panel. Drill a 3/16" hole in the center of the nail hem
and nail the siding through this hole to control the direction of
expansion and contraction. Another option is to nail each end
of a nail slot located at the center of the panel.
Set the spacing using the PanelThermometer and temperature
indicator lines and install the panel courses as described on
page 95.
Continue to stagger the panel courses, alternating each time
to ensure a random shingle pattern up the wall.
Installing under a window or opening
Install Cedar Impressions undersill trim. Cut the panel to fit
under the window. Drill a 3/16" hole in the center of the nail
hem. Using a snap lock punch, raise tab faces on the outside
of the panel 1/4" from the trimmed edge, 6" apart. Lock the
panel into the previous course, and center nail the siding
through the 3/16" hole drilled earlier. (Center nailing controls the
direction of the panel’s expansion and contraction.) Lock the
panel into place.
Installing over a window or opening
Cut the panel to fit over the window by measuring from the
locking tab of the previous row to the bottom of the receiving
pocket. Add 1/8" to this measurement. Turn the panel over
and, using this measurement, measure from the bottom of the
return leg.
Cut the panel to this dimension. Install the cut panel by
positioning the panel over the window and into the receiving
pocket. Lock the cut panel into the previous course by
pushing in and up. The cut edge should be 1/4" below the top
of the receiving pocket.
Finishing the top course
To finish the top course of siding, attach cornice receiver to the
top of the wall under the eave or soffit. Trim the top panel to
within 1/4" of the cornice receiver. Using a nail slot punch,
punch nail slots 1/4" from the trimmed edge, 16" apart. Nail off
the top course and snap the cornice molding into the cornice
receiver.
An alternate method is to use J-channel and furring strips, as
described for installing under a window.
Installing Cedar Impressions Mitered Cornerpost
If you are planning to install Mitered Cornerposts, space the
siding panel 3" from the edge of the corner. Lock the first
corner over the siding, making sure it also locks into the
starter strip. Nail the corner through the top two nail slots.
CertainTeed Vinyl Siding Installation Guide
97
cedar
impressions panel
cornice
molding
cornice receiver
1/4"
1/4"
back side of panel to be cut
bottom of
return leg
window
cedar impressions
undersill trim
cedar impressions
family panel
bottom of
receiving channel
measure from
the locking tab
to the bottom
of the receiving
channel and
add 1/8"
bottom of
locking tab
drill 3/16" dia. hole at midpoint
of remaining panel 28-1/2"
“B”
D7" Staggered Perfection Shingles
This product is not designed for roof application. It is designed
solely for installation on vertical surfaces.
Panels must be installed with nails over a solid substrate with
nail holding strength such as plywood, oriented strand board,
or existing wood siding (minimum 7/16" thick). This product
cannot be installed with staples.
NOTE: Each panel must be nailed through the round hole
in the center of the nail hem to control the direction of
normal expansion and contraction. If you are installing a
partial panel and the center nail hole has been cut off, drill
a nail hole in the center of the nail hem of the cut panel
and nail through it.
Panel Spacing at Different Temperatures
As with any plastic siding, Cedar Impressions® expands and
contracts with changes in temperature. For this reason, it is
important that you space the panels according to the panel
temperature at the time of installation. Failure to provide the
proper spacing according to these temperature ranges may
result in gaps that are too large or too small, thereby creating the
potential for side lock tabs disengaging, panel distortion, or
buckling. Spacing of panels previously installed at a different
temperature does not require adjustment.
Each panel has a PanelThermometer™ that displays panel
temperature and indicator lines that serve as guides for proper
spacing between the panels. The PanelThermometer is
located on the upper right-hand corner of the panel; the
indicator lines are on the upper left-hand corner.
Note that the panel temperature may change throughout the
day. Space the panels according to the panel temperature at
the time of installation.
The cells on the PanelThermometer will change color to
indicate the temperature of the panel.
NOTE: If two temperature cells on the PanelThermometer
show a color change, use the brighter color as the
indicator.
PanelThermometer Temperature
Reading Indicator Lines
0 Set to 0 line
30 Set to 30 line
65 Set to 65 line
100 Set to 100 line
130 Set to 130 line
160 Butt panels tight
98
CertainTeed Vinyl Siding Installation Guide
panel temperature indicator lines
If the brightest cell is between the numbered temperature cells,
position the panel between the corresponding temperature
indicator lines. Example: If the PanelThermometer reads 65,
align the second panel to the 65 temperature indicator line on
the first panel. If the cell between the 65 and 100 is brighter,
position the panel between the 65 and 100 temperature
indicator lines.
First course
Strike a level line around the house and install Metal Starter. If
you plan to use Cedar Impressions Mitered Cornerpost, make
sure the starter strip is installed to the edge of the corner. An
alternative method of starting Cedar Impressions is to use Jchannel
in place of starter strip to receive the bottom edge of
the panel.
Cut 2" off the top course of the panel at indicator “A,” which is
located above the nail slots.
Starting on the right side of the wall, hook the bottom locking
leg of the panel into the starter strip and slide panel into the
cornerpost or receiving channel. Leave 1/4" space between
the panel and the corner for expansion. If you are planning to
install the Mitered Cornerpost, space the panel 3" from the
corner.
Fasten the panel to the wall by first nailing through the round
center hole in the nailing hem at the top of the panel. Continue
nailing the panel with 5 nails: one in the right-end nail slot and
one at each of the QuickReference™ Nail Mark Indicators.
Leave 1/8" to 1/16" between the nail heads and the panel to
allow freedom of movement during normal expansion and
contraction.
Install the next panel by positioning it below the starter strip
and next to the first panel. Push in and up to lock the panel
into the starter strip and the side tabs of the first panel, as
shown. Space the second panel according to the panel
temperature at the corresponding temperature indicator lines.
Nail the panel into position starting with the round center hole
and then placing the next nail in the right-end nail slot (which
overlaps the previous panel’s left-end slot) so that the nail
goes through both panels’ nail slots simultaneously. Continue
nailing the rest of the panel using the procedure outlined
above.
Continue to install remaining panels of first course as
described earlier.
Second course
Cut 23-1/2" off of the right side of the D7 shingle at indicator
“B,” which is located above the nail slots, cutting straight
through the panel (figure 6). Drill a 3/16" hole in the center of
the nail hem and nail siding through this hole to control direction
of expansion and contraction. Another option is to nail each end
of a nail slot located at the center of the panel.
CertainTeed Vinyl Siding Installation Guide
99
23-1/2"
drill 3/16" dia. hole
at midpoint of
remaining panel
“B”
2"
“A”
QuickReference
Nail Mark Indicators
1/4"
1/4"
Set the spacing using the PanelThermometer and temperature
indicator lines and install as described earlier.
Continue to stagger panel courses, alternating each time to
ensure a random shingle pattern up the wall.
Installing under a window or opening
Install Cedar Impressions undersill trim. Cut the panel to fit
under the window. Drill a 3/16" hole in the center of the nail
hem. Using a snap lock punch, raise tab faces on the outside
of the panel 1/4" from the trimmed edge, 6" apart. Lock the
panel into the previous course, and center nail the siding
through the 3/16" hole drilled earlier. (Center nailing controls the
direction of the panel’s expansion and contraction.) Lock the
panel into place.
Installing over a window or opening
Cut the panel to fit over the window by measuring from the
locking tab of the previous row to the bottom of the receiving
pocket. Add 1/8" to this measurement. Turn the panel over
and, using this measurement, measure from the bottom of the
return leg.
Cut the panel to this dimension. Install the cut panel by
positioning the panel over the window and into the receiving
pocket. Lock the cut panel into the previous course by
pushing in and up. The cut edge should be 1/4" below the top
of the receiving pocket.
Finishing the top course
To finish the top course of siding, attach cornice receiver to the
top of the wall under the eave or soffit. Trim the top panel to
within 1/4" of the cornice receiver. Using a nail slot punch, punch
nail slots 1/4" from the trimmed edge, 16" apart. Nail off the top
course and snap the cornice molding into the cornice receiver.
An alternate method is to use J-channel and furring strips, as
described for installing under a window.
Installing Cedar Impressions Mitered Cornerpost
Install the siding on both sides of the wall before you install the
cornerpost. Space the siding 3" from the edge of the corner. The
corners are designed to fit over the panels that are used to start
a new course. Lock the first corner over the siding, making sure
it also locks into the starter strip. The top of the corner must be
inline with the top of the panel. Nail the corner through the top
two nail slots.
The right-side corner gap has cut marks at 1/8" increments.
They allow you to fit the corner to the different butt heights you
may encounter as you finish a course. Trim the corner gap as
needed to fit the panel.
100
CertainTeed Vinyl Siding Installation Guide
cedar
impressions panel
cornice
molding
cornice receiver
1/4"
1/4"
bottom of
receiving channel
back side of
panel to be cut
measure from the
locking tab to the
bottom of the
receiving channel
and add 1/8"
bottom of
locking tab
bottom of return leg
window
cedar impressions
undersill trim
cedar impressions
family panel
trim as
needed
to fit corner
Cornice Cap with Cedar Impressions
Mitered Cornerpost
General
Before applying siding and accessories, make certain the
substrate is watertight. In order to be properly protected from
precipitation, the substrate may need to be flashed to shed
water to the exterior. The siding and accessories alone are not
meant to be a watertight barrier.
Cedar Impressions panels will be installed from the right to the
left.
NOTE: If the application situation allows, install both wall
sides of the corner at the same time. This will allow for
small corrections to be made to the cornerpost
installation.
Cedar Impressions outside corner installation
Install the first Cedar Impressions panel 3" from the edge of
the outside wall.
Hook the corner piece over the siding, making sure it engages
into the starter strip and nail through the top two holes.
Continue installing corner pieces as you move up the wall.
When you reach the top panel, cut to length and nail with
color-matched finish nails.
If you end on an outside corner that has a cornerpost
installed, you need to measure from the edge of the panel to
the edge of the cornerpost. Add 1-1/2" to this dimension; it
will be the panel length.
CertainTeed Vinyl Siding Installation Guide
101
Angle the panel into the cornerpost and slide to the left until
the side tabs clear. Next, slide the panel to the right until you
have the correct temperature marks lined up.
Install the top section of Mitered Cornerpost. Leave 1/4"
between the top corner piece and the cornice receiver.
NOTE: Depending upon the area of the D9 Staggered
Rough-Split panel you finish with, you may have to install
furring behind the cornice receiver to accommodate the
thickness of the Rough-Split panel.
Snap the cornice molding into the cornice receiver. The
cornice molding should be 1/4" from the edge of the
wall.
Hook the top of the cornice cap over the end of the cornice
moldings and snap the bottom into place.
Alternately, you can slide the cornice cap over one of the
cornice moldings until the other cornice molding can be
inserted.
102
CertainTeed Vinyl Siding Installation Guide
cornice receiver
cornice cap
1/4" from edge
Cedar Impressions Inside Cornerpost
Siding and accessories alone are not meant to be a watertight
barrier. Before applying siding and accessories, make certain
the substrate is watertight. Flash the substrate so that it sheds
water outside the siding.
Cedar Impressions panels are installed from right to left. If the
application situation allows, install both wall sides at the
corner at the same time. This will allow you to make small
corrections to the Inside Cornerpost installation as you move
up the wall.
Installing Cedar Impressions Inside Cornerpost
When installing Inside Cornerposts, be sure to run Metal
Starter to the inside corner.
Install Cedar Impressions panels from right to left. Install the
Cedar Impressions panels into the inside corners. Leave a 3"
gap on each side of the corner.
Once the panel has been fastened, hook the Cornerpost over
the siding, making sure it is locked into the starter strip. Nail
through the top two holes of the Cornerpost. Continue
installing the Cornerpost as you move up the wall.
When you reach the top panel, cut the Cornerpost to length
and nail it \with a color matched finish nail.
If the Inside Cornerpost is installed before the siding, you will
have to cut the Cedar Impressions panel to fit.
Measure from the edge of the last installed panel to the edge
of the Cornerpost. Add 1-1/4" to this dimension, and cut the
panel to length.
Angle the panel under the Cornerpost and slide it to the left
until the side tabs clear. Then slide the panel to the right until
the correct temperature marks on the panel are lined up.
Fasten the panel to the wall.
CertainTeed Vinyl Siding Installation Guide
103
Half-Round Shingles
Important
This product is not designed for roof application. It is designed
solely for installation on vertical surfaces.
Panels must be installed with nails over a solid substrate with
nail holding strength such as plywood, oriented strand board,
or existing wood siding (minimum 7⁄16" thick). This product
cannot be installed with staples.
NOTE: Each panel must be nailed through the round hole
in the center of the nail hem to control the direction of
normal expansion and contraction. If you are installing a
partial panel and the center nail hole has been cut off, drill
a nail hole in the center of the nail hem of the cut panel
and nail through it.
Panel Spacing at Different Temperatures
As with any plastic siding, Cedar Impressions expands and
contracts with changes in temperature. For this reason, it is
important that you space the panels according to the panel
temperature at the time of installation. Failure to provide the
proper spacing according to these temperature ranges may
result in gaps that are too large or too small, thereby creating
the potential for side lock tabs disengaging, panel distortion,
or buckling. Spacing of panels previously installed at a
different temperature does not require adjustment.
Each panel has indicator lines that serve as guides for proper
spacing between the panels. The indicator lines are on the
upper left-hand corner. Before you install Half-Round Shingles,
make sure the panels are acclimated to the ambient
temperature. As the ambient temperature changes during the
day, it may be necessary to adjust the panel spacing to reflect
the change in the panel temperature.
Space the panels according to the panel temperature at the
time of installation.
Panel Temperature Temperature Indicator Lines
30° to 40° Set to 30 line
41° to 55° Set halfway between 30 and 65 lines
56° to 75° Set to 65 line
76° to 90° Set halfway between 65 and 100 lines
91° to 100° Set to 100 line
104
CertainTeed Vinyl Siding Installation Guide
30° F
65° F
100° F
panel
temperature
indicator
marks
use these marks on installed
panels for quick alignment of
second course – use temperature
indicators for final panel
adjustments
First course
Strike a level line around the house and install Metal Starter
Strip (see illustration 1a). An alternative method of starting Half-
Rounds is to use J-channel in place of starter strip, to receive
the bottom edge of the panel (see illustration 1b). To use this
method, the rounded portion of the panel must be removed
below the locking leg to create a continuous straight edge.
NOTE: When using a J-channel as a starter, leave 1/4"
between the siding panel and pocket.
Remove 2-5/8" from the left side of the upper panel course,
leaving a 90° left side edge.
Starting on the left side of the wall, hook the bottom edge of
the panel into the starter strip and slide the panel into the
cornerpost or receiving channel. Leave 1/4" space between
the panel and the inside wall of the cornerpost for expansion.
Fasten the panel to the wall by first nailing through the round
center hole of the nailing hem at the top of the panel. Then
fasten the rest of the panel by nailing through the centers of
the remaining nail slots a maximum of every 8" to 16" on
center. Provide 1/8" to 1/16" between the nail head and the
panel to allow freedom of movement during normal expansion
and contraction. Failure to provide this space between nail
head and panel will cause the panel to buckle. Do not put a
nail into the far right slot until overlapping panel is positioned
for installation.
Install the next panel by using a dual motion of hooking into
the starter strip and sliding over the previous panel. This will
ensure a proper lap.
Position overlapping panel so that there is 1/8" to 1/4"
between the panels, depending on the panel temperature at
time of installation. The spacing may appear larger or smaller
than the spaces between the shingles on the panel. This is
normal and necessary in order to allow for expansion and
contraction.
Nail in the center of the far left slot of the overlapping panel.
Continue to install the remaining panels of first course as
described above.
CertainTeed Vinyl Siding Installation Guide
105
1/4"
1/4"
2-5/8"
always secure first
using center pin hole
1/8"-1/4"
illustration illustration
1a 1b
Second course
Remove 13-1/4" of the left side measured from the upper
panel, cutting straight through the lower panel course. (Note
the small mark on the face of the panel.) Drill a 3/16" hole in
the center of the nail hem and nail the siding through this hole
to control the direction of expansion and contraction.
NOTE: The 13-1/4" spacing provides the farthest
separation of overlapping courses.
For easier application of complete panels, 1/4" vertical lines
have been added to the top edge of the nail flange for quick
initial alignment. Simply align the right edge of the upper panel
with one of the vertical alignment marks on the lower course.
However, always use the temperature indicator marks on the
right side of the upper panels for final alignment.
Cedar Impressions Half-Rounds may also be installed by
sliding the right panel up while ensuring the side lock tabs
engage with the flange of the left panel. This method is useful
when installing panels into cornerposts and J-channel around
windows and doors.
Continue to stagger panel courses, alternating each time to
ensure a random shingle pattern up the wall.
106
CertainTeed Vinyl Siding Installation Guide
13-1/4"
side locking tabs
drill 3/16" diameter hole at midpoint
of remaining panel
Installing under a window or opening
Install Cedar Impressions undersill trim. Cut the panel to fit
under the window. Drill a 3/16" hole in the center of the nail
hem. Using a snap lock punch, raise tab faces on the outside
of the panel 1/4" from the trimmed edge, 6" apart. Lock the
panel into the previous course, and center nail the siding
through the 3/16" hole drilled earlier. (Center nailing controls
the direction of the panel’s expansion and contraction.) Lock
the panel into place.
Installing over a window or opening
To install siding over a window, measure from the lock tab of
the course below the window top to the top of the window.
Add 3/4". Cut the panel to this dimension. This will allow the
panel to be lowered down far enough to engage the locking
tabs of the lower panel. After it is positioned into the locked
position, the cut edge will still be 1/4" below the top of the
J-channel.
Finishing the top course
To finish the top course of siding, attach cornice receiver to
the top of the wall under the eave or soffit. Trim the top panel
to within 1/4" of the cornice receiver. Using a nail slot punch,
punch nail slots 1/4" from the trimmed edge, 16" apart. Nail
off the top course, and snap the cornice molding into the
cornice receiver.
An alternate method is to use J-channel and furring strips.
CertainTeed Vinyl Siding Installation Guide
107
cornice receiver
1/4"
1/4"
cedar impressions panel
cornice
molding
window
cedar impressions
undersill trim
cedar impressions
family panel
Half-Round Shingles in Gable Ends
NOTE: The following instructions focus on a gable
installation. They also are geared towards an enclosed
gable, started with a J-channel. The Half-Round can also
be started with starter strip. This is an example only!
Installing receiving channels
Frame the border area with 3/4" J-channel. Nail in place
loosely. Miter joints accordingly.
NOTE: You also can use 3-1/2" or 5" lineals to frame gable
ends and gable base. For instructions on cutting lineals
for peaks, see “Gable Trim” on page 56.
Cut enough J-channel to span the base of the gable, then
secure it in place.
NOTE: The instructions below show how to create a gable
installation with a complete, centered Half-Round at the
peak.
Making the starter course
Gable installations properly terminate with a single round at
the peak. To create this effect, you usually have to adjust the
height of the starter course.
To determine the height of the starter course, calculate the
number of rows required to complete the gable.
Use the following formula:
Gable height (inches) ÷12.5 (face exposure) = courses required
NOTE: Gable height is measured from inside the
horizontal receiving channel to the peak (allowing
1/4" at top and bottom for expansion).
For example, with a 68" gable height, the calculations would
be 68 ÷ 12.5" = 5 with a remainder of 0.44. This means you
would need 5 full courses plus 0.44 x 12.5" (face exposure of
panel) = 5.5" measured from the top edge of the gap on the
upper course (illustrated). This is the visible height for your
starter course. The visible height is the vertical dimension of
the panel you’ll see below the first full row of rounds.
Once you’ve determined the visible height of the starter
course, mark this dimension on a Half-Round Shingle panel.
Measure from the top of the gap on the upper course
(illustrated). Draw a cutting line the entire length of panel.
Cut and use the top section, which contains the locks, as your
starter course. Cut enough panels to span base of the gable.
108
CertainTeed Vinyl Siding Installation Guide
gable
height
5-1/2"
top of gap
5-1/2"
cut
remove
Hanging the starter course
To end up with a single “round” centered at the peak of the
gable, you must properly locate the first starter panel.
Begin by marking a vertical plumb line from the peak.
Then measure and mark the finished height line. In our
example, using a starter course with a 5-1/2" visible height,
the finished height is 9-3/8".
With your ruler inserted into the pocket of the lower
J-channel, mark a line on the substrate equal to the finished
height (remember to allow 1/4" for expansion). Repeat at
several points along the gable base. Use these marks to
strike a horizontal level line that will guide the nailing of the
starter course.
The point where the plumb line and the horizontal level line
intersect marks the starting point for hanging the first starter
course panel (if the first starter panel intersects the plumb line).
Determine whether you will center a “scallop” or a “V” at the
starting point. This decision is based on the number of
courses required to complete the gable.
The rule of thumb is:
Center an upper scallop if the initial calculations had less than
0.5 courses remaining (0.44 in our example).
Center the gap or “V” of the upper course if more than 0.5
courses remained.
(In our example we require 5.44 courses, so we would center
on a scallop.)
More than one panel will probably be required to reach the
plumb line. Measure from the plumb line into the pocket
receiving channel (leaving 1/4" for expansion) as illustrated
at left.
CertainTeed Vinyl Siding Installation Guide
109
30ºF
65ºF
100ºF
9-3/8"
9-3/8"
gap or “v”
remainder of
“scallop”
5-1/2"
plumb
line
plumb
line
finished
height line
If you require an odd number of courses (i.e. five full courses
plus starting course), subtract 8" from the distance from the
plumb line to the left receiving pocket (remember to allow 1/4"
for expansion).
If you require an even number of courses (i.e. 6 full courses
plus starting course), subtract 18-1/2" from the dimension.
NOTE: The 8" and 18-1/2" dimensions ensure having a full
centered scallop at the topmost part of the gable.
For example: If the measurement required to the plumb line
(minus 8" for an odd number of full courses) is 152", then
152"÷ 32" = 4 full panels plus 0.75% of one panel or 24"
measured from the edge of the texture on the right side
(temperature indicator side).
Create a cutting guide as described earlier for gable
applications and trim first panel (for this example) at 24".
Continue to hang the remaining starter course strips,
remembering to center nail first.
Installing first full panel
It is important to stagger the panels, as described in this
section. The easiest way to determine the length of panel
required is to measure from the alignment line on the nail
flange of the starter panel to the edge of the roof slope (see
illustration).
Using this measurement, drill a hole centered in the remaining
nail flange as described earlier. Lock the first full exposure
panel to the starter course after trimming for roof slope.
After locking panel in place, center pin the panel.
Lapping remaining panels
The remaining panels to be installed must be lapped in
accordance with the current temperature.
Repeat this process for the entire course.
At the end of each course, trim panels to the gable angle. Be
sure to allow for expansion at the J-channels.
Installing the last round
When you reach the peak, trim the last round to the desired
height by removing the locks. Then face nail to the substrate,
using a color-matched finishing nail.
110
CertainTeed Vinyl Siding Installation Guide
plumb
line
152" 8"
24"
mark cut for roof slope
length of first
full panel
length of first
full panel
second
alignment
mark
line represents the bottom of
the first full course of scallops
Cedar Impressions on a Steep Rake
A solid nailable substrate is required for this product. The
substrate must have the nail holding equivalent of a 3/4"
penetration of a nail into solid wood.
Installing Cedar Impressions on
Non-vertical Walls
Cedar Impressions must never be used as a roofing material.
However, the panels can be used on non-vertical applications
that meet the following conditions:
• The non-vertical wall must be decorative and not functional.
• The non-vertical wall must not be greater than 20° off the
vertical (no less than a 70° angle).
• The top of the wall cannot be higher than 30' above grade.
Because of different wind-load requirements, your local
building code may stipulate a lower height. Use the lesser of
the two heights.
Before you install Cedar Impressions on a non-vertical wall,
install a non-binding, self-adhering underlayment or
waterproofing membrane. Cap the uppermost edge of the top
course of siding to prevent water from getting behind the
siding. Flash all accessories to shed water away from the
substrate. Siding alone is not meant to be a watertight barrier.
CertainTeed Vinyl Siding Installation Guide
111
no less
than 70°
30'
drill and center nail
hand punch slots 16"
from center and nail
Starting Cedar Impressions
with Lineals over Horizontal Siding
112
CertainTeed Vinyl Siding Installation Guide
cedar impressions panel is
inserted into the pocket of the
lineal, making sure to leave 1/4"
for downward movement
cedar impressions perfection
shingle or half-round shingle
with lower round removed
5" lineal
1/4"
flashing
new construction
starter strip
dual undersill trim
hand-punched horizontal
siding (locking area has
been removed); siding
panel locks into dual
undersill trim
butt dual undersill
trim upward against
bottom of flashing
Starting Cedar Impressions
over Horizontal Siding
NOTE: Half-Round Shingles are shown, but this method
also works for the Perfection shingle.
Cut away nail flange and discard.
Hand punch nail slots in panel face and secure panel.
Secure Metal Starter Strip after hand punching and securing
siding piece.
NOTE: Only the Metal Starter Strip may be used with
Cedar Impressions.
Lock Cedar Impressions panels into starter strip and secure.
CertainTeed Vinyl Siding Installation Guide
113
center nail in
slot of metal
starter strip
final
assembly
cut away and
discard
hand
punch
slots
Application of Half-Round
Shingle under Soffit
The amount of trimming required for a Cedar Impressions
Half-Round Shingle panel determines the accessory piece
required to receive it. See the descriptions below.
Perfection Shingles do not have these restrictions.
114
CertainTeed Vinyl Siding Installation Guide
removal of nail flange up to the locking lug:
requires drilling a new center hole, and
punching a slot on both ends (16" from
center); this allows for expansion
removal of 1-1/8" or more of the nail flange:
use cornice receiver or Deluxe F-channel and
cornice molding – drill a new center hole and
punch a slot on both ends (16" from center)
removal of 1-1/2" or more: use either
J-channel or cornice receiver and cornice
molding – drill a new center hole, and punch
a slot on both ends (16" from center)
removal of 3" or more: use standard 3/4"
pocket J-channel or cornice receiver and
cornice molding combinations – drill a new
center hole, and punch a slot on both ends
(16" from center)
Special Effects with Cedar Impressions
Another look can be achieved by using the lower locking tabs.
First, remove the protective material from the sides of the tabs
(see left). Lock the upper panel into the tab and secure.
NOTE: This method can also be used to finish the top
course of shingles.
Perfection Shingles can also be mixed within Half-Round
Shingles applications as shown below left.
To do this, the “flash” material must be removed from the
lower tabs on the face of the Half-Round panels with a utility
knife (as shown above). The resulting lock allows the next
course of Half-Rounds to be secured.
Lock Perfection Shingles into newly created lock tabs and
secure.
Cedar Impressions Half-Round Shingles with Perfection
Shingles (left).
CertainTeed Vinyl Siding Installation Guide
115
Replacing a Damaged Cedar Impressions
Panel with the Repair Kit (Option 1)
Cam clips and snap rivets are included in the kit.
You will also need a hammer, utility knife, chisel, and “wonder
bar” or “roof snake bar.”
Removing the damaged panel
Cut a large rectangle out of the damaged panel. Cut or chisel
through the sides of the panel and remove the lower half.
Pry the nails out of the nail hem of the damaged panel.
116
CertainTeed Vinyl Siding Installation Guide
cam clip
roof
snake bar
wonder
bar
snap rivet
Push up on the panel to unlock it, and then pull down to
remove the damaged panel.
Preparing the new panel
Cut off all top locking tabs.
Flip the panel over and cut 1/8" off the side locking tabs.
NOTE: For Half-Round Shingles, notch the side locking
tab on a 45° angle.
NOTE: On the D9” Staggered Rough-Split Shakes and T5”
Straight Edge Perfection Shingles panels, there are 7
locking tabs, but there are only 6 cam clips per kit. Place
one cam clip in the nail slot above each of the end locking
tabs, working towards the middle of the panel using all 6
clips. Leave one locking tab in the middle of the panel
without the cam clip.
NOTE: For Half-Round Shingles install four cam clips in
nail slot locations (left to right) 3, 13, 18, and 28.
CertainTeed Vinyl Siding Installation Guide
117
From the back, insert a snap rivet into a nail slot above one of
the locking tabs. Then place a cam clip over the snap rivet.
Push on the back button of the snap rivet to secure the clip to
the panel. Repeat over each locking tab area. Now you are
ready to install the new panel.
Installing the new panel
Slide the left side of the new panel into the side locking tabs.
To engage the right side tabs into the existing panel, flex the
panel out from the center. As you raise the new panel into
position, make sure the bottom lip of the panel engages the
locking tabs on the panel below.
Lift up the panel above the new panel far enough to place the
nails into the old nail holes.
Using your WonderBar or roof snake bar, drive the nails in by
placing the bar on the nail head and hitting the bar with a
hammer.
While applying pressure to the top panel, pull down on the
cam cords. Make sure each cam clip engages the lip of the
panel above it. Keep pulling down on the cam cords until
they break off.
118
CertainTeed Vinyl Siding Installation Guide
Replacing a Damaged Cedar Impressions
Panel (Option 2)
You will need a hammer, wood chisel, and hacksaw or utility
knife.
Use a wood chisel to remove the lock tabs on the top side of
the damaged panel. Lock tabs can be located by using the
chisel to slightly lift the panel locked into the upper portion of
the damaged panel.
After locating the lock tabs, place the bevel of the chisel down
against the face of the damaged panel; use a hammer and the
chisel to knock off the lock tabs of the damaged panel. Then
remove the nails on the damaged panel, and pull the panel
down and remove it.
On the replacement panel, use a hacksaw or utility knife to cut
the lock tabs to half their original length. Slide the replacement
panel back into the position of the removed damaged panel.
Use the hammer handle to put pressure against the bottom
butt of the replacement panel to force pressure upward
enough that the replacement panel will engage with the panel
above.
Drill a nail hole in the center of the top portion of the
replacement panel. Then use a colored trim nail to control the
direction of expansion of the replacement.
NOTE: While this method provides an aesthetically
acceptable replacement, it does not actually secure the
panel to the wall. The only way to secure a replacement
panel with nails is to remove the siding from the top of the
wall down until the damaged panel can be removed.
CertainTeed Vinyl Siding Installation Guide
119
locate lock
tab with
chisel tip
and remove
cedar impressions panel
(upper course)
butt leg of upper
cedar impressions
panel
colored trim nail
cedar impressions panel
(lower course)
Northwoods S7" and S9" Shakes
Overview
The installation of a Northwoods Shakes or Shingles panel is
unique in that the lap joint is hidden in the ribs between the
shake or shingle pattern. Positioning the laps in the rib area
requires that special installation procedures be followed to
maintain product performance and aesthetics.
Panels must be installed from right to left. The left panel will
overlap the right panel.
Factory Laps
All lap joints are cut at a predetermined point on the panel
during the manufacturing process. All male laps must be
factory cut. Female laps may be field cut using the gap.
However, do not cut along the edge of the gap; leave 3/16" of
the gap for the overlap.
Center Pinning
Vinyl siding expands and contracts as the temperature of the
panel changes. To maintain the proper rib width at the lap
joint, you will have to limit the movement of the panels. To do
this, you must center pin each panel. Center pinning prevents
the rib width at the lap joint from becoming too wide or too
narrow.
Center pin each panel regardless of its length.
Install the siding according to one of the following methods,
depending on whether the substrate is or is not fully nailable.
NOTE: Vinyl siding must be applied over a rigid sheathing
that provides a smooth, flat surface or an underlayment
(such as wood, wood composition, rigid foam or fiber
sheathing) that is no more than 1" thick. Vinyl siding
cannot be applied directly to studs. See pages 20-23 for
additional information about proper sheathing and
substrates.
Installation procedure for fully nailable substrate
Lock the right side panel into place on the starter strip. Allow
room for expansion and contraction in all accessory pockets:
• 1/4" if the ambient temperature is above 40° F.
• 3/8" if the ambient temperature is below 40° F.
120
CertainTeed Vinyl Siding Installation Guide
center pin
Locate the mark at the center of the panel. Use the nailing slot
closest to this mark. Center pin the panel in this location using
one of the following options:
a. Install a nail on both ends of the same nail slot.
b. Drill a 3/16" diameter hole through the nail hem and
substrate, and place a single fastener through this newly
drilled hole.
Install nails in the center of the remaining slots, 16" apart. Leave
adequate room between the fastener head and the nail flange
for expansion and contraction (approximately 1/16" to 1/8"). Do
not hard nail these fasteners.
Install the next panel to the left of the installed panel. Lap this
panel over the installed panel, positioning the right edge of the
panel to the appropriate temperature mark, which is located in
the factory notch area.
If the ambient temperature is less than 45°F, lap the panel to
the first (30°) mark.
If the ambient temperature is between 45°F - 80°F, lap the
panel to the second (65°) mark.
If the ambient temperature is greater than 80°F, lap the panel
to the third (100°) mark.
Fasten the panel according to the procedure described earlier.
Continue the first course of siding, remembering to center pin
every panel.
Start the next course of siding from the right side, repeating
the earlier steps. Offset the laps from course to course a
minimum of 2 feet.
CertainTeed Vinyl Siding Installation Guide
121
temperature marks
30° 65° 100°
2' min.
Installation procedure for a NON-fully nailable
substrate
Lock the right side panel into place on the starter strip. Allow
room for expansion and contraction in all accessory pockets:
• 1/4" if the ambient temperature is above 40° F.
• 3/8" if the ambient temperature is below 40° F.
Locate the framing member (wall stud) nearest the center of
the panel and center pin the panel into the framing member
using one of the following options:
a. If a nail slot is located over the framing member, install a
nail on both ends of the same nail slot.
b. Drill a 3/16" diameter hole through the nail hem and
framing member, and place a single fastener through
this newly drilled hole.
Install nails in the center of the remaining slots, 16" apart,
secured into a framing member. Leave enough room between
the fastener head and the nail flange for expansion and
contraction (approximately 1/16" to 1/8"). Do not hard nail
these fasteners.
Install the next panel to the left of the installed panel. Lap this
panel over the installed panel, positioning the right edge of the
panel to the appropriate temperature mark. Fasten the panel
according the procedure described earlier and continue the
course of siding.
Start the next course of siding from the right side, repeating
the steps described earlier. Remember, offset the laps from
course to course a minimum of 2 feet.
122
CertainTeed Vinyl Siding Installation Guide
cutaway view of wall construction
wall
stud
non nailable substrate
panel
center
wall stud
closest to
panel center
Northwoods S10" Shakes
Overview
The installation of Northwoods 10" Shakes is unique in that
the lap joint is hidden in the ribs between the shake patterns.
Positioning the laps in the rib area requires that special
installation procedures be followed to maintain product
performance and aesthetics.
Panels must be installed from right to left. The left panel will
overlap the right panel.
Factory Laps
All lap joints are cut at a predetermined point on the panel
during the manufacturing process. All laps must be factory
cut. There should be NO field cutting of laps.
Install the panels from right to left. The left panel will overlap
the right panel.
Center Pinning
Vinyl siding expands and contracts as the temperature of the
panel changes. To maintain the proper rib width at the lap
joint, you will have to limit the movement of the panels. To do
this, you must center pin each panel. Center pinning prevents
the rib width at the lap joint from becoming too wide or too
narrow.
Each panel contains a short vertical slot, which is
perpendicular to the nail slots. This slot marks the center of
the panel. Center pin each panel regardless of its length.
NOTE: Vinyl siding must be applied over a rigid sheathing
that provides a smooth, flat surface or an underlayment
(such as wood, wood composition, rigid foam or fiber
sheathing) that is no more than 1" thick. Vinyl siding
cannot be applied directly to studs. See pages 20-23 for
additional information about proper sheathing and
substrates.
Install the siding according to one of the following methods,
depending on whether the substrate is or is not fully nailable.
Installation procedure for fully nailable substrate
Lock the right side panel into place on the starter strip. Allow
room for expansion and contraction in all accessory pockets:
• 1/4" if the ambient temperature is above 40° F.
• 3/8" if the ambient temperature is below 40° F.
CertainTeed Vinyl Siding Installation Guide
123
center pin
Locate the mark indicating the center of the panel. Use the
nailing slot closest to this mark. Center pin the panel in this
location using one of the following options:
a. Install a nail on both ends of the same nail slot.
b. Drill a 3/16" diameter hole through the nail hem and
substrate, and place a single fastener through this newly
drilled hole.
Install nails in the center of the remaining slots, 16" apart.
Leave adequate room between the fastener head and the nail
flange for expansion and contraction (approximately 1/16" to
1/8"). Do not hard nail these fasteners.
Install the next panel to the left of the installed panel. Lap this
panel over the installed panel, positioning the right edge of the
panel to a vertical “alignment mark” located in the factory
notch area (approximately 1" from the left, top edge) of the
installed panel.
Fasten the panel according to the procedure described earlier,
remembering to center pin every panel.
Continue the first course of siding.
Start the next course of siding from the right side, repeating
the steps above. Remember, offset the laps from course to
course a minimum of 2 feet.
Installation procedure for a NON-fully nailable
substrate
Lock the right side panel into place on the starter strip. Allow
room for expansion and contraction in all accessory pockets:
• 1/4" if the ambient temperature is above 40° F.
• 3/8" if the ambient temperature is below 40° F.
Locate the framing member (wall stud) nearest the center of
the panel and center pin the panel into the framing member
using one of the following options:
a. If a nail slot is located over the framing member, install a
nail on both ends of the same nail slot.
b. Drill a 3/16" diameter hole through the nail hem and
framing member, and place a single fastener through
this newly drilled hole.
124
CertainTeed Vinyl Siding Installation Guide
2' min.
cut away view of wall construction
wall
stud
non-nailable substrate
panel
center
wall stud
closest to
panel center
alignment mark
Install nails in the center of the remaining slots, 16" apart,
secured into a framing member. Leave enough room between
the fastener head and the nail flange for expansion and
contraction (approximately 1/16" to 1/8"). Do not hard nail
these fasteners.
Install the next panel to the left of the installed panel. Lap this
panel over the installed panel, positioning the right edge of the
panel to the vertical “alignment mark” located in the factory
notch area (approximately 1" from the left, top edge) of the
installed panel.
Fasten the panel according the procedure described earlier
and continue the course of siding.
Start the next course of siding from the right side, repeating
the steps described earlier. Remember, offset the laps from
course to course a minimum of 2 feet.
CertainTeed Vinyl Siding Installation Guide
125
126
CertainTeed Vinyl Siding Installation Guide
Installing CedarBoards
CedarBoards™ insulated siding will help even out wall
surfaces. However, to minimize extremes in the peaks and
valleys of uneven walls, you may have to repair the
underlayment. Make sure the substrate is smooth, flat, and
weathertight. If the surface is significantly uneven, apply 1/4"
(minimum) foam sheathing before installing CedarBoards
Siding. If the wall surface is smooth, use standard
underlayment practices.
The key to creating a visually attractive installation is to lap
away from areas where people normally walk or gather. For
example, on the front wall, work from the corners to the
entrance door (so overlaps face away from door). On side
walls, work from the rear corners toward the front. This
approach minimizes the effect of lapping and produces the
best appearance. Keep lap appearance in mind throughout
installation.
Starter strips
Insulated siding is thicker than hollow vinyl siding. To
accommodate the 1-1/4" thickness, we recommend that you
use the CedarBoards starter strip.
An alternative method of starting CedarBoards is to use 1-1/4"
J-Channel in place of starter strip to receive the bottom edge
of the panel.
Fastening
Use 2" (minimum) corrosion-resistant nails to penetrate the
wood substrate at least 3/4". Drive the nails until there is 1/16"
between the nail head and the nail flange.
Center the nail in the slot and drive the nail straight in. Do not
drive nails at an angle. Space nails 16" o.c.
STUDfinder Installation
The STUDfinder™ Installation System combines precisely
engineered nail slot locations with graphics to create a siding
panel that is designed to help ensure quick, accurate and
secure installation. The nail slots are positioned 16" on center
to allow for alignment with studs, with STUDfinder graphics
centered directly under each nail slot.
Locate the first stud and fasten in the center of the nail slot.
Ensure that nail penetration is at least 3/4" to comply with
ASTM D4756 (specification for vinyl siding installation). Notice
which STUDfinder letter appears below the slot.
Go to the next repeat of the letter to find the next stud. For
example, if your first stud is at “T,” so will the succeeding
studs in 16" o.c. applications (every 10th slot). When installing
CedarBoards XL 16'8" panels, the succeeding studs are at
every 8th slot.
3"
1-1/4"
CertainTeed Vinyl Siding Installation Guide
127
dual
crimp
nail slots
trim
foam
1-1/4" J-channel
When you apply the next panel, adjust the overlap, as
necessary, to line up with studs and repeat the steps above.
NOTE: CedarBoards panels must overlap 1" – 1-1/2".
Consequently, the overlapping panels may not use the
same letter as your initial panel.
Fitting into trim pieces
Around windows, doors, and other openings, use 1-1/4"
CedarBoards accessories. When the outside temperature is
higher than 40° F, allow a 1/4" gap between the siding and the
trim. When the temperature is less than 40° F, leave a 3/8" gap.
For CedarBoards XL, allow a 3/8" gap between the siding and
the trim when the outside temperature is above 40°F; 1/2"
when the temperature is below 40°F.
Around windows and doors
Because insulated siding is thicker than hollow vinyl siding,
windows, doors, and other openings may have to be built out
to avoid looking recessed. Use wood shims and either
aluminum trim coil or vinyl lineals to build out openings. In
some cases, the foam backing in CedarBoards siding will
create enough stiffness to span over or under a window
without additional support.
If you are using utility trim or dual undersill trim to secure the
panel, shim the trim to accommodate the thickness of the
siding panel. Remove the top 1" of the foam backing so the
top of the panel fits into shimmed trim. Use a snap lock punch
to raise tabs every 6" to lock the panels into the trim.
When you cut a siding panel to fit around an opening, use a
nail slot punch to create additional nail slots. Fasten through
these additional nail slots to secure the panel. Make sure the
face of the J-channel or other trim will cover the nail slots.
Under soffit
Secure the last course of siding under the soffit with utility
trim, dual undersill trim, or cornice receiver with finish board.
You will have to create tabs or nail slots as described above.
We recommend the cornice receiver with finish board, as it
provides an attractive look and eliminates the need for shims.
Overlapping panels
On factory-cut panels, the foam is set back from both ends of
the panel. The adhesive begins 2" back from the end of the
foam. To correctly overlap the panels, slip the vinyl edge of the
bottom portion of the seam between the foam and the vinyl
panel.
For standard length CedarBoards, slide the panels together
until the foam ends touch or you achieve a minimum overlap
of 1". The maximum overlap should not exceed 1-1/2"
because exceeding an overlap of 1-1/2" can compromise the
appearance of the lap.
For CedarBoards XL:
• Above 40°F, overlap the panels 1-1/4" to 1-3/4"
• 40°F and below, overlap panels 1" to 1-1/2" and leave a
1/4"space between the foam
TIP: For ease of handling extended length product, we
recommend carrying the panels on edge, not flat. Twoperson
installation is also suggested.
Measuring CedarBoards
When lapping two factory laps, you will often butt the panel
foam and not lap 1" as in standard vinyl applications. This
mandates a different approach from standard practice when
you measure CedarBoards panels.
When filling in a piece to end a course of siding, hold the tape
tight into the receiver of the corner post, J-channel, etc., and
measure the distance to the foam of the existing piece already
hung. Subtract the proper amount for expansion and
contraction depending on the temperature.
As you measure on the full piece to be cut, measure from the
foam on the factory end that butts to the existing piece to your
desired measurement. This will ensure a butt fit on the foam and
the proper room in the receiver for expansion and contraction.
Creating a field lap
For best appearance, lap factory ends only. If you must lap a
non-factory end, you will first have to remove the foam and
adhesive.
Cut back the foam approximately 3/4" on the field cut,
fabricate the top and bottom panel end notches, and always
use a factory notch as the overlapping panel. Place the fieldcut
end into the factory end.
128
CertainTeed Vinyl Siding Installation Guide
Trimming Curved Openings
Flexible J-channel simplifies installations around curved
objects such as half and full round windows. To install around
the top of an arched window, follow these simple steps:
Measure the circumference of the arch, then add 1-1/2" to
allow for overlap of the bottom J-channel.
Place the channel along one side of the window, leaving a 3/4"
section below the bottom edge of the window sill (shown).
Position the first nail at the base of the arch. Drive the nail
through the flange, tightly securing the flexible channel.
NOTE: This is an exception to the rule that says don’t
fasten vinyl tightly. When installed around curved objects,
flexible channel must be nailed tightly.
Place additional nails every 6" along the flange. Again, nail
tightly. Be sure the last nail is positioned at the base of the
opposite arch.
Using a utility knife, cut through the back of the channel, at the
point where it extends beyond the bottom edge of the window
sill. Make a second cut perpendicular to the first at the base of
the channel face. The length of the cut should equal the length
of the extension (shown).
Put a 90° bend in the channel, then nail the resulting tab under
the window (shown).
Repeat at opposite ends of arch.
To install the bottom J-channel, square cut the corners to
overlap the flexible J-channel. Use the same technique
described under “Installing window and door trim” (page 36).
Use pop-rivets to secure corners (shown). Use washers on
the inside of the rivets to prevent pull through.
NOTE: Remember to properly flash all windows.
129
CertainTeed Vinyl Siding Installation Guide
SECTION 9 – Special Situations
6"
3/4"
3/4"
90°
window
bottom
pop
rivet
Frieze Board
You can create a frieze-board appearance using the 3-1/2"
lineals in combination with new construction window starter or
J-channel used as a starter.
You will need: 3-1/2" or 5" lineals and new construction
window starter or J-channel.
Position the short leg of new construction window starter
against the soffit or overhang and nail it in place.
Snap the lineal onto the locking edge of the new construction
window starter between the starter and the soffit/overhang,
and nail it in place.
Trim 1-1/2" from the return leg of the overlapping lineal. Make
a cut 1-1/2" at the 90° bend of the lineal face and inside
(locking) edge. Trim 1-1/2" from the nail flange and receiving
channel. Overlap the lineals 1" by fitting the notched lineal
over the un-notched lineal.
An alternative to using new construction window starter is to
use 1/2" J-channel as a starter. Install the J-channel with the
back edge against the soffit or overhang. Then slide the lineal
over the J-channel.
Decorative Sunbursts
Sunbursts are not a product; they are an installation technique
you can use to create an outstanding decorative finish at
major accent areas such as gable ends or over garage door
openings. Creating a decorative sunburst isn’t difficult, but it
does take patience and attention to detail. If you’re ready for a
professional challenge, add a sunburst to your next
installation.
NOTE: Because each sunburst installation involves unique
dimensions and angles, the following instructions outline
the basic technique. You must adapt these instructions to
your specific installation.
130
CertainTeed Vinyl Siding Installation Guide
1"
You will need J-channel, starter strip, coil stock and siding.
When choosing a siding panel, remember that wider panels
install more quickly than narrow panels. In addition, panels
with decorative profiles – for example, dutchlap – are
impractical for sunburst applications. For best appearance and
easiest installation, choose from single exposure or larger face
double exposure panels.
In addition to standard installation tools, you’ll need a nail hole
punch and a pop rivet gun.
The following instructions assume an installation at a gable
end. Refer to the illustrations for each step.
Plumb J-channels back-to-back in the center of the gable.
Cut the nail hem and lock off a siding panel. Put the pieces
aside; you’ll need them for the final step.

Measure the distance between the J-channel and the rake.
Subtract an allowance for expansion. Cut the panel to this
length (“proper length” in illustration). Trim the panel at the
rake end to match the rake angle.
Cut the panel to the correct taper (third cut). This is a critical
step, because the “flaring” of each panel allows you to create
the sunburst’s arch. To create the taper on a single exposure
panel, start at the channel end of the panel. Mark a point
1-1/2" above the bottom butt. Then, on the opposite end,
mark a point where the upper edge of the panel meets the
rake. (If using double exposure panels, the mark goes under
the center butt. On double exposure panels, the upper
exposure is removed completely.) Now scribe a line between
both points and cut with a utility knife or snips.
Pop-rivet the nail hem and lock to the trimmed panel. Using
the factory nail hem as a guide, punch slots in the panel.
Position the panel and nail it.
CertainTeed Vinyl Siding Installation Guide
131
J-channel
keep nail hem
1-1/2"
proper
length
third cut
keep butt
leg area
Repeat until both sides of the sunburst are completed.

NOTE: To install the final panels at the top of the
sunburst, bow the panels slightly and slip them under the
gable end J-channel. For added protection against high
wind, you may have to face nail these panels.

Form a sleeve from aluminum coil stock and cover the center
J-channels. Secure it with pop rivets.

Cut an arched section from coil stock to form the “sun”
portion of the sunburst. Leave a 1" strip below the arch and
bend it out at a right angle. Fasten the piece in place using
pop rivets.