Installing Vinyl Window Casing

Mark the two measurements on the trim and set your miter saw to cut a 45 degree angle between the two measurements.

Installing vinyl window casing.

Glue a vinyl end cap onto each end of the vinyl windowsill. It s a look you ll appreciate every time you cross the threshold into your beautiful home. Repeat to cut and install vinyl casing for the opposite side and top of window. Before installing door and window trim first caulk around the openings to create a moisture and air proof seal.

Along the tops install j channel trim with horizontal siding and base trim with vertical siding. Set vinyl casing against vertical side of window and scribe bottom end to match angle of sill. Measuring from the sill to the top of the window along the inside edge. If window casing is installed flush to jamb unintentional gaps can form over time as the wood dries or the house settles.

Then add 3 1 2 inches to allow for the 45 degree angle. Use these retrofit window installation measurements to order the windows from a lumberyard or home center. Install the tops first then the sides and then the bottoms of the window surrounds. Cut bottom end of casing with aviation snips then install the casing against the window.

For even more personality and charm add a decorative corner or crown molding above the door or window. The tape or other adhesive is between the glass and the back part of the window frame with the snap bead over the front of the glass securing the glass in place. Double check these retrofit window installation measurements to ensure their accuracy so you don t end up with a window that doesn t fit. It is decorative providing a contrast to the area around the window and also it keeps water from.

Installing the trim slightly away from the jamb edges will help hide discrepancies. Instruction on how to install exterior 2x4 trim around a new or old window. In most cases the old frame dimensions will match a standard size vinyl window. Cut the vertical trim.

Exterior trim around a window serves two purposes. Install door window trim.