How To Install Window Trim Interior Youtube. Start by scoring the drywall in the corners and along the window with a sharp utility knife. Installing new interior window trim can be a daunting task for the beginnerintermediate carpenter but this step-by-step video will definitely show you all.
Measure the width of your window add the width of both side casings. Nail the thick part of the trim to the framing with 2-in. Start at the top and align the outside of the trim with the end of the head trim.
Step 1 Planning.
Start with the bottom then sides and finish with the top. Because you will be installing an interior window casing I would recommend using a 16 or 15 gauge nail gun to make sure the board will stay in place. Measure and crosscut the window stool to length from 1x4 primed pine. Step 1 Planning.