How To Install Interior Vinyl Window Trim. To glue joints together use PVC cement since wood glues like Titebond II dont work all that well with PVC. First use a rafter square to make two pencil marks that form an L around each corner of the jamb.
Next nail the skinny trim piece in place. Nail the thick part of the trim to the framing with 2-in. Dont worry well fill in those cracks later.
On the interior of a home nail holes in PVC can be filled with almost anything used with wood.
Cut the boards on a table saw to create the box. Put a few spots of hot melt. Self adhesive back and corrugated lines make straight application and installation easy. Expansion gap between the trim and the window frame.