Installing Window Trim Over Lap Siding

How to caulk the window trim on lap siding 1.

Installing window trim over lap siding.

The main difference in the installation instructions from glancing through them both is that the hz10 product is permitted to have the trim installed over the siding while the hz5 product is not. The other method is to install trim that overlaps the face of siding so that when you look at the side of the trim there are gaps due to the bevels in the siding. Last edited by jerry peck. This meant our new windows would have trim that was much wider than our old windows making it necessary to cut away a bit of our siding to sit flush with the edge of that new trim.

On the web i see two different methods of putting trim around windows and doors on walls that have siding. One method is cut the siding very precisely so it buts into the side of the trim. Scrape the side of the window trim next to the siding and the immediate edge of the lap siding with a paint scraper. Cut the horizontal piece to size and snap it in place over the vertical moldings.

Before you replace the siding cut and install new j channels to prevent water from leaking into your home. In order to get the most accurate cut line we decided to place our new window in the opening to trace it. We used pressure treated 2 x 4 s for the trim around the windows and the doorway and then we had to create trim corners for both the inside and the outside corners like the ones in the picture above. Featured how to install lp smartside trim siding.

Contractors watch this video to learn about the advantages of using lp smartside trim siding products and how to install them.