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.

Here s how they do it. Instruction on how to install exterior 2x4 trim around a new or old window. Many people myself included are very sensitive to insulation. Cut a 45 degree angle on one end of the trim and hold it so the short end of the angle.

But in my experience the best product is a vinyl flat trim that matches the window frame. It s all done by eye with a sharp pencil a miter saw and an 18 gauge nailer. Cut the trim so it is two channel widths longer than the opening s width. Install the tops first then the sides and then the bottoms of the window surrounds.

You can use wood trim from the hardware store or some other product. After the insulation is in place you want to install trim around the inside to finish the job.