Installing Vinyl J Channel Around Windows

Nail loosely enough so that the j molding slides.

Installing vinyl j channel around windows.

Through the middle of the slots. If necessary bend the siding to fit into place. The vinyl siding trim pieces should slide back and forth slightly. It will look much better if you miter the corners.

Position the j channel under the window. Square corner j channel installation. Install the j channel vinyl siding around all four sides of a window or three sides of a door. Do not forget to extend the side j channel above the top of the window frame make it at least 1 inch above the top of the window.

Cut a tab in the bottom of the side j channels and fold under. Nail it to the wall but remember not to nail it tightly. Don t drive them tight. Drive roofing nails every 8 to 10 in.

Cut and install bottom j flush with the sides of the window casing. For the window first position the j channel against the window casing. Install j channel under the window. Mitering corners of the j channel.

The next step in waterproofing your window is to install the j channel. This gives it a clean professional look. Cut and position an undersill trim if necessary see when to use undersill trim. You can use roofing nails that are made of galvanized aluminum or stainless steel with high user ratings and good resistance to corrosion.

Install side j channels flush with the lower face of the bottom j channel and with the top of the window casing. Place the side j channel and mark it then mark the bottom j channel. Hammer in roofing nails approximately every 8 inches at the middle of the nailing slots. Cut and install top j flush with the outer face of the side j s.

You work from the bottom up with this step as well overlapping top to bottom. Install the j molding along the bottom edge of the window. Cut and bend drain tab. J channel pieces should be installed similarly to the f channel across from each other so the soffit fits between the lengths of the j channel.