When installing window molding start at the top.
How to trim vinyl siding around windows.
Most trim carpenters don t even use a tape to trim windows.
Cut a 1 inch notch out of the j molding at both ends by scoring it with a utility knife across its top side.
Exterior window trim on vinyl siding if your home has vinyl siding and you d like to add vinyl window trim you will first need to remove the existing siding and j channel from around the windows.
Cut a 45 degree angle on one end of the trim and hold it so the short end of the angle.
Use tin snips to cut a length of j molding 2 inches longer than the width of the window.
Use tin snips to trim off the metal flashing covering the exterior windowsill.
It s all done by eye with a sharp pencil a miter saw and an 18 gauge nailer.
Unscrew and remove the storm window from the outside of the window.
Notch the vinyl windowsill with tin snips to fit the existing windowsill.