How To Install Vinyl Siding Window Trim

Draw a line on the wall along the top of each siding course before you pull the nails.

How to install vinyl siding window trim.

Notch the vinyl windowsill with tin snips to fit the existing windowsill. To expedite installing vinyl siding on your home or for large projects you may want to call a professional vinyl siding company. Fashioning metal window trim with a brake is complicated for a do it yourselfer. If your horizontal cut was made at a wider portion of the siding s profile it will fit firmly inside the j channel.

Along the tops install j channel trim with horizontal siding and base trim with vertical siding. Each piece that is adjacent to the window should slide neatly into the j channel that you have installed. Install the tops first then the sides and then the bottoms of the window surrounds. Slide the zip tool under the butt edge of the siding hook the locking edge and pull down.

Remember to leave about a inch for expansion. Lift the unlocked siding to expose the nailing hem of the siding piece below. Cut the trim so it is two channel widths longer than the opening s width. Install j channels at doors and windows and under roof eaves and rakes.

Use tin snips to trim off the metal flashing covering the exterior windowsill. Pry off the vinyl siding and j channel from around the perimeter of the window. Then slide the tool horizontally along the lock to release it. Not all windows require this but if yours does call a professional for this step.