Installing Vinyl Siding Under Windows

Undersill trim for instance is installed under windowsills or other horizontal projections and grasps the top edge of the siding panel below it see installing window trim.

Installing vinyl siding under windows.

Be sure to check both sides for proper fit. The siding slides behind vinyl siding trim pieces that hide the gap and the cut end. Longer siding panels don t stretch as readily as smaller ones so they re not as easy to adjust if they get out of whack. Measure and cut panel to fit.

A mark the cuts for siding under the window. Measure and cut panel in the same manner detailed in step 14 but cut lower portion instead of top. When you get to a window you will need to cut sections from the panels directly above and below it to fit. To install the siding if partial panels are required mark the line to cut by measuring from the edge of the lock of the panel and cut the panel to the proper width.

B cut the siding to fit under windows. Finishing top row of siding under eaves. Place the piece of siding to be installed under the window along the bottom edge and hold it where it will be located horizontally along the wall. This will leave a panel with an intact nail hem and proper exposure.

To prevent the relatively thin panels from buckling observe these fitting and nailing rules. Place the siding that has to be notched under the window. Fitting siding over windows. Drop siding panel into j channel around top of window and install.

Gap at all ends. Vinyl siding depends on a few special trim pieces that either hold everything together or hide the edges and ends of the panels. To get the depth of the notch measure the distance from the locking tab on the siding below to the undersill trim. Measure the width of the piece you need to cut by holding the length of siding against the window and marking the edge points on the panel with a pencil.

Install siding around windows. When installing vinyl siding on each side of a window or door start on the side that needs the longer panels. When you mark each side add a inch to the width to allow for expansion. For more information refer to pages 28 32 of the vsi vinyl siding installation manual.