Installation Instructions

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CertainTeed Vinyl Siding Installation Guide

To install, lock the bottom of the cut panel into the panel below.

Push the top edge into J-channel or undersill trim. Tabs will catch

in the trim and hold the panel ﬁrmly in place.

NOTE: Since you will not nail this last course, it is important

that the tabs ﬁt properly in the trim to provide support while

allowing movement for expansion.

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.

Completion

Attaching objects to siding

All external products (downspouts, shutters, and lights, for

example) are attached to walls after you’ve applied the vinyl siding.

NOTE: All external ﬁxtures must be attached to a solid

backing (such as 3/4" exterior grade plywood) to provide

a secure mounting surface. Never attach a ﬁxture directly

to vinyl siding.

When installing external products, you must allow for expansion

and contraction of siding.

You can allow for this movement in two ways:

The most convenient way to attach light ﬁxtures is with light

blocks. Because they contain receiving channels to hold siding

panels, light blocks provide a simple way to allow for expansion.

When attaching other ﬁxtures, drill holes in the siding 1/4" larger

than the diameter of screws, bolts, or nails being used to fasten

objects. This provides adequate clearance so the siding can move

freely underneath attached objects. When attaching objects, do

not fasten tightly. It is also recommended that you apply caulk

around the screws.

Fitting at light blocks

When cutting panels to ﬁt at a light block, be sure to allow

for expansion.

1/4"

cornice

molding

1/4" to 3/8"

for expansion

light block

mounting

bracket

1/4"

from

edge