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CertainTeed Vinyl Siding Installation Guide
94
Section 10 — Installing Specific CertainTeed Products
Cedar Impressions
®
Shingles and Shakes
Important
These products are not designed for roof application. They are
designed solely for installation on vertical surfaces.
The 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). These products 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. Do not drive center-pin nails tight.
Leave 1/8"–1/16" between the nail head and the panel to
allow the panel to move freely during 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 panels 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.
Drainage Channels
Some building codes require that Cedar Impressions panels
be installed so that there is drainage space behind the panel.
This space will allow moisture to escape from the panels while
preventing water intrusion from the exterior. Information about
installing drainage channels is available at www.certainteed.com
Panel Spacing at Different Temperatures
As with any plastic siding, Cedar Impressions D7" Perfection
Shingles, T5" Straight Edge Perfection Shingles, D9" Staggered
Rough-Split Shakes, and D7" Straight-Edge Rough Split Shakes
expand and contract 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, panels distorting, or buckling.
Spacing of panels previously installed at a different temperature
does not require adjustment.