Installation Instructions

CertainTeed Vinyl Siding Installation Guide

140

Repairing Buckled Siding at the Joist

Vinyl siding sometimes becomes buckled between the ﬁrst and

second ﬂoors of a newly built siding installation due to settling

and shrinkage of wet lumber and some framing practices. Using

“engineered” lumber for the joist greatly reduces the chances of

shrinkage and settling and can help prevent buckling of siding.

If, however, you do have a building with this situation, here is a

way to correct the problem using aluminum starter strip.

With a zip-lock tool, unlock the buckled panel from the panel

below by inserting the hooked end of the tool behind the return

leg of the buckled panel until the hook catches.

Pull down and “unzip” the panel.

Insert an inverted scrap piece of starter strip into the exposed

receiving lock of the lower panel.

With the scrap piece inserted into the lock, lay the upper panel

over the starter strip. The starter strip should be visible behind the

upper panel. Mark a line on the scrap piece where the return leg

of the upper panel meets the scrap piece.

Trim the starter on this line, saving the portion with the

locking edge.

NOTE: Cut the starter strip in short lengths to ease

handling and relocking.

Insert the trimmed edge into the lock of the lower panel.

Begin at one end and, using a zip-lock tool, pull the return leg

of the upper panel down to engage the upper panel with the

aluminum starter strip.