How To Install Trim Corners Around Windows For Vinyl Siding

When installing window molding start at the top.

How to install trim corners around windows for vinyl siding.

It s all done by eye with a sharp pencil a miter saw and an 18 gauge nailer. But in my experience the best product is a vinyl flat trim that matches the window frame. You can use wood trim from the hardware store or some other product. Install j channels at doors and windows and under roof eaves and rakes.

Install the tops first then the sides and then the bottoms of the window surrounds. Here s how they do it. Cut the trim so it is two channel widths longer than the opening s width. After the insulation is in place you want to install trim around the inside to finish the job.

Along the tops install j channel trim with horizontal siding and base trim with vertical siding. Cut a 45 degree angle on one end of the trim and hold it so the short end of the angle.