Filter
Top Products
CertainTeed Vinyl Siding Installation Guide
110
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, OSB, 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 3/16" hole in
the upper center of the panel, and nail through it.
When cutting Cedar Impressions siding, use a 40-tip carbide blade
mounted in the standard (not backwards) position. Using this
technique will reduce burring; it does not gum up the saw; and the
blade stays sharp longer.
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
use these marks on installed panels
for quick alignment of second
course—use temperature indicators
for final panel adjustments
panel
temperature
indicator
marks
Note: Many installers use small
infrared thermometers to determine
panel temperatures.