How To Install Window Trim Over Vinyl Siding
Install j channels at doors and windows and under roof eaves and rakes.
How to install window trim over vinyl siding. Lock the notched. Place the piece of siding to be installed under the window along the bottom edge and hold it where it will be located. Pry off the vinyl siding and j channel from around the perimeter of the window. Unscrew and remove the storm window from the outside of the window.
Install the tops first then the sides and then the bottoms of the window surrounds. Along the tops install j channel trim with horizontal siding and base trim with vertical siding. Measure the distance from the inside top of the j channel to the locking tab of the course below and subtract 1 4. Use tin snips to trim off the metal flashing covering the exterior windowsill.
Cutting and installing the siding 1. Cut the trim so it is two channel widths longer than the opening s width.