Cutting Siding For Window Trim

If you re cutting dark vinyl siding use chalk or light colored tape to mark the line you want to cut.

Cutting siding for window trim.

Instruction on how to install exterior 2x4 trim around a new or old window. Touch up the divided hardie trim boards before trimming them to your window. Place the top piece and hold the trim 3 16 in. If it s between 60 and 80 degrees leave a 1 16 in.

Gap for every 18 ft. Make sure that a drip cap is installed first over the window before going for the hardie siding. Cut away the extra siding. Do not miter corner joints of band boards fascia corner trim etc.

How to install window trim mark the length. Cut a 45 degree angle on one end of the trim and hold. Use a carpenter s square to draw the line straight. You will see the trims lay nice and flat.

See diagram 2e 4a. Mark the line you want to cut on the siding with a pencil. Place the piece of siding to be installed under the window along the bottom edge and hold it where it will be located. The windows would be more work imo.

Get the spacing right. Where edges of trim meet siding material windows doors or other finished openings leave a minimum 3 16 inch 5 mm space to allow for proper sealing. Below 60 degrees leave a 1 8 in. Provide increased spacing along the trim if specified by the siding application instructions.

Measure the distance from the inside top of the j channel to the locking tab of the course below and subtract 1 4. Face nail trims using 2 inch 16 gauge finish nails after every 16 inches apart. Exterior trim over siding i have never seen it on window door trim but seen plenty on door window trim. Check the fit then cut.

Away from the jamb at both ends and along the base. When installing window molding start at the top. Lock the notched. Cutting and installing the siding 1.

Make the line as dark as possible so it s visible when you re cutting it. After installation cover the gap with acrylic or urethane caulk.