How To Install Vinyl Siding Window Trim

Notch the vinyl windowsill with tin snips to fit the existing windowsill.

How to install vinyl siding window trim.

Install j channels at doors and windows and under roof eaves and rakes. Install the tops first then the sides and then the bottoms of the window surrounds. Cut the trim so it is two channel widths longer than the opening s width. Use tin snips to trim off the metal flashing covering the exterior windowsill.

Not all windows require this but if yours does call a professional for this step. Lift the unlocked siding to expose the nailing hem of the siding piece below. To expedite installing vinyl siding on your home or for large projects you may want to call a professional vinyl siding company. Alternatively vinyl siding can also be trimmed by scoring them with a utility knife at the point at which you wish them to be trimmed and then snapping the piece off along the scoreline.

Along the tops install j channel trim with horizontal siding and base trim with vertical siding. Slide the zip tool under the butt edge of the siding hook the locking edge and pull down. If your horizontal cut was made at a wider portion of the siding s profile it will fit firmly inside the j channel. Then slide the tool horizontally along the lock to release it.

Fashioning metal window trim with a brake is complicated for a do it yourselfer. Pry off the vinyl siding and j channel from around the perimeter of the window. Remember to leave about a inch for expansion. Unscrew and remove the storm window from the outside of the window.