Cutting Siding For Window Trim

Cut away the extra siding.

Cutting siding for window trim.

Away from the jamb at both ends and along the base. 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. If you re installing trim in temps higher than 80 degrees f cut pieces to fit tightly. 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.

Check the fit then cut. 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. Get the spacing right. When installing window molding start at the top.

Below 60 degrees leave a 1 8 in. Instruction on how to install exterior 2x4 trim around a new or old window. Cutting and installing the siding 1. Place the top piece and hold the trim 3 16 in.

Make the line as dark as possible so it s visible when you re cutting it. If it s between 60 and 80 degrees leave a 1 16 in. How to install window trim mark the length. Place the piece of siding to be installed under the window along the bottom edge and hold it where it will be located.

Touch up the divided hardie trim boards before trimming them to your window. Mark the line you want to cut on the siding with a pencil. The windows would be more work imo. Make sure that a drip cap is installed first over the window before going for the hardie siding.

Lock the notched. Use a carpenter s square to draw the line straight. See diagram 2e 4a. After installation cover the gap with acrylic or urethane caulk.

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. Do not miter corner joints of band boards fascia corner trim etc. You will see the trims lay nice and flat.

If you re cutting dark vinyl siding use chalk or light colored tape to mark the line you want to cut. Exterior trim over siding i have never seen it on window door trim but seen plenty on door window trim.