Cutting Siding For Window Trim

Touch up the divided hardie trim boards before trimming them to your window.

Cutting siding for window trim.

Mark the line you want to cut on the siding with a pencil. You will see the trims lay nice and flat. Make the line as dark as possible so it s visible when you re cutting it. Get the spacing right.

If it s between 60 and 80 degrees leave a 1 16 in. If you re installing trim in temps higher than 80 degrees f cut pieces to fit tightly. Make sure that a drip cap is installed first over the window before going for the hardie siding. Exterior trim over siding i have never seen it on window door trim but seen plenty on door window trim.

Cut a 45 degree angle on one end of the trim and hold. Measure the distance from the inside top of the j channel to the locking tab of the course below and subtract 1 4. Cut away the extra siding. 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.

Place the piece of siding to be installed under the window along the bottom edge and hold it where it will be located. Do not miter corner joints of band boards fascia corner trim etc. Place the top piece and hold the trim 3 16 in. If you re cutting dark vinyl siding use chalk or light colored tape to mark the line you want to cut.

Check the fit then cut. Using a circular saw set to the right depth just a hair shallower than our siding to ensure we didn t break through the house wrap or wall and a brace to ensure a straight cut we cut away the extra siding from around our window frame. Cutting and installing the siding 1. See diagram 2e 4a.

Below 60 degrees leave a 1 8 in. After installation cover the gap with acrylic or urethane caulk. Instruction on how to install exterior 2x4 trim around a new or old window. It s normally a cost cutting measure when done at the corners they don t have to be careful or precise about the corner cut etc.

When installing window molding start at the top. How to install window trim mark the length. Gap for every 18 ft. Provide increased spacing along the trim if specified by the siding application instructions.

Face nail trims using 2 inch 16 gauge finish nails after every 16 inches apart. Lock the notched.