Installation Instructions

CertainTeed Vinyl Siding Installation Guide

Transitioning from brick, stone, or stucco to vinyl siding

To transition from brick, stone, or stucco to vinyl siding:

• Caulk where the sheathing meets the brick, stone, or stucco.

Caulk the ﬂashing, and make sure a drip cap is in place.

• Use J-channel or starter strip to receive the siding when

installing horizontal siding, If you use starter strip, leave 3/8"

clearance so that the siding can engage securely.

• When installing vertical siding, use J-channel to receive

the siding.

Installing remaining courses

To ensure best appearance, position the laps to avoid unsightly

joint patterns. The illustration at left shows a well-planned

staggering of panel joints. Follow these guidelines:

• Separate joints by at least two courses.

• Avoid joints above and below windows.

• Leave at least 3' separating joints on successive courses.

• Use short cutoff lengths for ﬁtting at narrow openings

between windows.

• Follow the planned pattern when applying the next

courses of siding.

Fitting under windows

You’ll probably have to cut panels to ﬁt under windows.

To make this task easier, plan panel positioning as shown at left

so a single panel extends beyond both sides of window opening.

Follow these steps to measure and cut panels:

Hold the panel in place and mark the width of the window opening.

Add 1/4"–3/8" to both ends to allow for expansion. The resulting

marks show the location of vertical cuts. Extend the marks onto

the panel using a square.

Create a template for the horizontal cut using a small piece of

scrap siding. Lock this piece into the lower panel and mark 1/4"

below the sill height. This provides clearance for undersill trim.

Repeat the procedure on the opposite side of the window. (You

can’t assume windows will be perfectly level.)

Transfer the marks from the template to the panel. Connect marks

using a straightedge.

Cut the panel, using tin snips to make vertical cuts and a utility

knife to make the horizontal cut.

starter strip

or J-channel

sheathing

1/4"

flashing

mortar