Installation Techniques for Specific CertainTeed Products

Cedar Impressions® is not ordinary siding. Created from
the texture and random sizes of real cedar shingles,
Cedar Impressions® offers the most natural looking
cedar shingle siding available without the expense and heavy
maintenance of wood. Cedar Impressions® is manufactured in
three styles. Perfection and Half-Round Shingles and Rough-
Split Shakes are injection molded in polypropylene. Because
these panels are unique in design, special installation
techniques are required for each. Knowing these special
requirements will help you quote a Cedar Impressions®
installation properly.
See the CertainTeed Installation Guide (CTS 205) for
complete installation instructions.
Cedar Impressions® D7" Straight Edge and
D7" Staggered 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.
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
11. Installation Techniques for Specific
CertainTeed Products
34
Objectives
In this chapter, you will learn that, because of special features
and/or manufacturing techniques, some CertainTeed siding
products require different installation techniques.
• Cedar Impressions D7" Straight Edge Perfection Shingles
• Cedar Impressions D7" Staggered Edge Perfection Shingles
• Cedar Impressions D7" Straight Edge Rough-Split Shakes
• Cedar Impressions D9" Staggered Rough-Split Shakes
• Cedar Impressions T5" Straight Edge Perfection Shingles
• Cedar Impressions 6-1/4" Half Round Shingles
• Cedar Impressions Mitered Cornerposts and Cornice Cap
• Northwoods S7", S9", and S10" Shakes
• Cedar Boards and CedarBoards XL Insulated Siding
panel temperature
indicator lines
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 Panel-
Thermometer show a color change, use the brighter
color as the indicator.
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 Cedar
Impressions Metal Shingle 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.
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
35
2"
“A”
QuickReference
Nail Mark Indicators
1/4"
1/4"
PanelThermometer
Reading
Temperature
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
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 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. 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.
An alternate method is to use J-channel and furring strips, as
described for installing under a window.
Installing Cedar Impressions Mitered Cornerpost
with Straight Edge Perfection Shingles
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.
36
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
cedar
impressions panel
cornice
molding
cornice
receiver
1/4"
1/4"
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
back side of
panel to be cut
bottom of
return leg
Installing Cedar Impressions Mitered Cornerpost
with Staggered Edge Perfection Shingles
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.
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 butt heights you
may encounter as you finish a course. Trim the corner gap as
needed to fit the panel.
Cedar Impressions® T5 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 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. If two temperature
cells on the PanelThermometer show a color change, use
the brighter color on the indicator.
If the brighter cell is between the numbered temperature cells,
position the panel between the corresponding temperature
indicator lines. For example, if the cell between the 65 and
100 is brighter, position the panel between the 65 and 100
temperature indicator lines.
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
37
PanelThermometer
Reading
Temperature
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
trim as
needed
to fit corner
First course
Strike a level line around the house and install Cedar
Impressions 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 Cornerposts, 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 above.
Continue to install the remaining panels of first course
as described.
38
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
1/4"
1/4"
Quick Reference
nail mark indicators
4"
Cut 4"
off the top
shingle and
cut through
to form a
straight
edge
“A”
Second course
Cut 30" off of the right side of the T5 panel 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 the 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.
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.
An alternate method is to use J-channel and furring strips.
If you are installing cornice molding with Mitered Cornerposts,
review the instructions for installing Mitered Cornerpost and
Cornice Cap.
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
39
30"
drill 3/16" diameter hole at midpoint
of remaining panel
remove 30" off the
right side
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
cornice
receiver
1/4"
1/4"
cedar impressions panel
cornice
molding
Cedar Impressions® 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.
panel temperature indicator lines
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 Panel-
Thermometer show a color change, use the brighter
color as the indicator.
If the brighter cell is between the numbered temperature cells,
position the panel between the corresponding temperature
indicator lines. For example, 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 Cedar
Impressions 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 Jchannel
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 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.
40
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
2"
“A”
PanelThermometer
Reading
Temperature
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
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 the remaining panels of the first course as
described earlier.
Second course
Cut 29" off of the right side of the D9 panel 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.
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
41
1/4"
QuickReference
Nail Mark Indicators
1/4"
29"
drill 3/16" dia. hole at midpoint
of remaining panel
“B”
Window
Cedar
Impressions
undersill trim
Cedar
Impressions
family panel
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 panel heights you
may encounter as you finish a course. Trim the corner gap as
needed to fit the panel.
Finish the top of the cornerpost with cornice molding and
cornice cap.
Note: Install both walls of the cornerpost at one time
so you can make small corrections to the cornerpost
installation.
Cedar Impressions® 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.
42
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
Cedar Impressions panel
cornice
molding
cornice receiver
1/4"
1/4"
trim as
needed
to fit corner
bottom of
receiving
channel
back side of
measure from panel to be cut
the locking
tab to the
bottom of
the receiving
channel and
add 1/8"
bottom of
locking tab
bottom of
return leg
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 Panel-
Thermometer show a color change, use the
brighter color as the indicator.
If the brighter cell is between the numbered temperature cells,
position the panel between the corresponding temperature
indicator lines. Example: If the Panel-Thermometer 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 Cedar Impressions
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 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.
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
43
2"
1/4"
“A”
PanelThermometer
Reading
Temperature
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
panel 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.
Second course
Cut 28-1/2" off of the right side of the D7 panel 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 43.
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.
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CertainTeed Vinyl Siding Master Craftsman Education & Development Program
QuickReference
Nail Mark Indicators
1/4"
28-1/2"
drill 3/16" dia. hole at midpoint
of remaining panel
“B”
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
back side of
panel to be cut
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.
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.
Cedar Impressions® Mitered Cornerpost
and Cornice Cap
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: Install both wall sides of the corner at the same
time so you can make small corrections 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.
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.
Snap the cornice molding
into the cornice receiver.
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
45
cornice receiver
Cedar Impressions panel
cornice
molding
cornice receiver
1/4"
1/4"
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.
Cedar Impressions® 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.
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CertainTeed Vinyl Siding Master Craftsman Education & Development Program
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
1/4" from
edge
1/4" from
edge
cornice cap
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
First course
Strike a level line around the house and install Shingle 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 Master Craftsman Education & Development Program
47
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.
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.
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CertainTeed Vinyl Siding Master Craftsman Education & Development Program
13-1/4"
side locking tabs
drill 3/16" diameter hole at midpoint of remaining panel
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
back side of
panel to be cut
bottom of
return leg
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.
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.
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.
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
49
5-1/2"
top of gap
5-1/2"
cut
remove
gable
height
Cedar Impressions panel
cornice
molding
cornice receiver
1/4"
1/4"
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.
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).
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CertainTeed Vinyl Siding Master Craftsman Education & Development Program
30…F
65…F
100…F
length of first
full panel
second
alignment
mark
line represents the bottom of the
first full course of scallops
30…F
65…F
100…F
plumb
line
152" 8"
24"
mark cut for roof slope
30…F
65…F
100…F
9-3/8"
9-3/8"
gap or “v”
remainder of
“scallop”
5-1/2"
plumb
line
plumb
line
finished
height line
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.
Northwoods™ 7" Straight Edge Rough-Split
Shakes, 9" Staggered Rough-Split Shakes,
and 10" Random Hand-Split Shakes
Overview
The installation of Northwoods Shakes is unique because 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 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. You do not have to notch the lock and shingle butt
when you create a field-cut lap.
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
page 18 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 temperature is above 40° F.
• 3/8" if temperature is below 40° F.
When installing a full panel, center pin the panel.
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
51
30…F
65…F
100…F
length of first
full panel
center pin
Install nails in the center of the nail slots, 16" apart. Leave
adequate room between the fastener head and the nail flange
for expansion and contraction (approximately 1/16" to 1/8").
When installing a partial panel, use one of the following options:
a. Place a nail on both ends of the same nail slot.
b. Drill a 3/16" diameter hole through the nail hem, and place
a single fastener through this newly drilled hole.
NOTE: Do not hard nail these fasteners.
To install the next S7" or S9" panel position it 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 panel temperature of a
S7" or S9" panel is less than
45°F, lap the panel to the
first (30°) mark.
If the panel temperature
is between 45°F–80°F, lap the
panel to the second (65°) mark.
If the panel temperature is
greater than 80°F, lap the panel
to the third (100°) mark.
To install the next S10" panel, position it 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 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 earlier steps. Offset the laps from course to course a
minimum of 2'.
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CertainTeed Vinyl Siding Master Craftsman Education & Development Program
30° 65° 100°
2' min.
alignment mark on S10" panel
temperature marks on S7" and S 9" panels
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 temperature is above 40° F.
• 3/8" if temperature is below 40° F.
Locate the framing member (wall stud) nearest the center of the
panel and center pin the panel into 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 or alignment 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'.
CedarBoards™ and CedarBoards™ XL
Insulated Siding
CedarBoards and CedarBoards XL 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.
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
53
cutaway view of wall construction
wall
stud
non nailable substrate
panel
center
wall stud closest
to panel center
3"
1-1/4"
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.
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.
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CertainTeed Vinyl Siding Master Craftsman Education & Development Program
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. Two
person 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.
CertainTeed Vinyl Siding Master Craftsman Education & Development Program
55
Summary
• Cedar Impressions panels feature a patented Panel-
Thermometer and temperature indicator marks that help
you correctly space the panels as the temperature of the
panels changes throughout the day.
• Cedar Impressions Mitered Cornerposts are installed as
you move up the wall with the siding. A special Cornice
Cap finishes the top piece of the cornerpost.
• Northwood Shakes are installed from right to left and are
center pinned before they are fastened to the wall.
• To ensure that accessories are on the same plane as the
siding, non-CedarBoards accessories that are used with
CedarBoards Siding should be fitted with foam shims
and fillers.