Cut the trim so it is two channel widths longer than the opening s width.
Installing vinyl wall trim.
This video shows how to properly trim around fixtures when installing vinyl siding.
Surface preparation for vinyl siding installation securely nail all loose boards and wood trim and replace any rotted boards.
The build up of old caulking interferes with the positioning of new trim for the siding.
Press the vinyl against the wall and flush on the floor as you work down the wall.
Nail the trim every 12 inches on center.
Use your hands and press along the length of the vinyl trim making sure it is even with the ground.
It may help to scribe a light line on the wall that you can line up the top edge of the molding with as you go to ensure a straight application.
Miter or cut tabs at the ends.
Press the vinyl trim up against the wall and press firmly all along the base to secure it to the wall.
Butt one end of the vinyl against the door molding or into the corner.
Scrape away old caulking around windows and doors.