How To Add Exterior Window Trim On Vinyl Siding

Pry off the vinyl siding and j channel from around the perimeter of the window.

How to add exterior window trim on vinyl siding.

Exterior window trim on vinyl siding if your home has vinyl siding and you d like to add vinyl window trim you will first need to remove the existing siding and j channel from around the windows. Because the vinyl siding on the exterior of the window does not provide a 100 waterproof barrier it s important to also install building paper and flashing to avoid water getting in and rotting the wood beneath the window. Use tin snips to trim off the metal flashing covering the exterior windowsill. Unscrew and remove the storm window from the outside of the window.

If you prefer shades of tan or brown pair a light vinyl siding with a matching soffit and make each window trim piece a darker shade of brown. Make the window sill a little wider than the rest of the window frame. If you see any holes in the building paper.