Cutting Siding For Window Trim

After installation cover the gap with acrylic or urethane caulk.

Cutting siding for window trim.

Instruction on how to install exterior 2x4 trim around a new or old window. Face nail trims using 2 inch 16 gauge finish nails after every 16 inches apart. Touch up the divided hardie trim boards before trimming them to your window. Do not miter corner joints of band boards fascia corner trim etc.

Get the spacing right. 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. Cutting and installing the siding 1. You will see the trims lay nice and flat.

Use a carpenter s square to draw the line straight. Make the line as dark as possible so it s visible when you re cutting it. How to install window trim mark the length. Below 60 degrees leave a 1 8 in.

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. 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. Mark the line you want to cut on the siding with a pencil.

If it s between 60 and 80 degrees leave a 1 16 in. Gap for every 18 ft. When installing window molding start at the top. Make sure that a drip cap is installed first over the window before going for the hardie siding.

See diagram 2e 4a. Lock the notched. Away from the jamb at both ends and along the base. Place the top piece and hold the trim 3 16 in.

The windows would be more work imo. Check the fit then cut. If you re installing trim in temps higher than 80 degrees f cut pieces to fit tightly. Measure the distance from the inside top of the j channel to the locking tab of the course below and subtract 1 4.

Place the piece of siding to be installed under the window along the bottom edge and hold it where it will be located. 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.