Installing A Window Sill Extender

You can replace your entire window sill to get the space you want or you can simply extend the window sill you already have.

Installing a window sill extender. Measure across window from jamb to jamb at the head and sill. Check this dimension against the shorter pieces of frame pocket filler. Install filler by snapping leg of filler into. A permanent extender requires the installation of brackets into the wall studs beneath the window.

Measure the distance between the two wall marks then add 1 1 2 inches to factor in your overhang on each side. A sill extender is shipped with your order to allow height adjustments and is field trimmable. Determine your window sill horn overhang. Use a saw and cut the window sill flush with the wall on either side of the window.

If filler is too long trim to the measured length. This measurement is your window sill length. Apply firm pressure to the adapter at the tape location to ensure proper adhesion to the window frame. Install vinyl sill extender by sliding the extender up into the frame channel.

One piece for the head and one for the sill. If an extender isn t permanently fastened to a wall or sill then position your plants carefully so the extender doesn t become stressed near an edge and collapse. Step 1 finishing the current window sill. Dows before window installation.

Press the sloped sill adapter onto the sill of the window. The aluminum sill extender is sized for a 36 wide door narrower units will need to have the extender cut to the same size of the sill. I typically use for an overhang. Sill extender is field trimmable for any necessary adjustments.

Casements and awnings are not compatible with a sill angle or head extender. To see hands on demonstrations of techni.