Cutting Siding For Window Trim

When installing window molding start at the top.

Cutting siding for window trim.

How to install window trim mark the length. 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. Cut a 45 degree angle on one end of the trim and hold. Instruction on how to install exterior 2x4 trim around a new or old window.

Check the fit then cut. Face nail trims using 2 inch 16 gauge finish nails after every 16 inches apart. 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. Measure the distance from the inside top of the j channel to the locking tab of the course below and subtract 1 4.

Mark the line you want to cut on the siding with a pencil. If you re cutting dark vinyl siding use chalk or light colored tape to mark the line you want to cut. Touch up the divided hardie trim boards before trimming them to your window. Use a carpenter s square to draw the line straight.

Get the spacing right. See diagram 2e 4a. After installation cover the gap with acrylic or urethane caulk. The windows would be more work imo.

Away from the jamb at both ends and along the base. Gap for every 18 ft. Cutting and installing the siding 1. Exterior trim over siding i have never seen it on window door trim but seen plenty on door window trim.

If you re installing trim in temps higher than 80 degrees f cut pieces to fit tightly. If it s between 60 and 80 degrees leave a 1 16 in. Cut away the extra siding. Make the line as dark as possible so it s visible when you re cutting it.

Provide increased spacing along the trim if specified by the siding application instructions. You will see the trims lay nice and flat. Make sure that a drip cap is installed first over the window before going for the hardie siding. Place the top piece and hold the trim 3 16 in.

Lock the notched. Do not miter corner joints of band boards fascia corner trim etc.