How To Install A Basement Window ~ in Masonry

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Installing The New Window:

Remove the sash and screen from the window so you can access the screw holes.

Center window in the opening and hold it up to the house mud sill.
Pre-drill holes through the window frame and secure window to the mud sill with galvanized or stainless steel screws.

If attaching to masonry, use a hammer drill and secure the window into place by installing double-threaded concrete screws along the sides and top of the window.

Install screw cover plugs if they come with your replacement window.

Filling In the Gaps:

Depending on the size of gap you have, fill any large gaps between the window and masonry foundations with one or a combination of the following:

□ Mortar

□ Mortar and brick, stone

□ Caulk along the sides and top of the window frame

□ Spray urethane foam under the sill to seal the bottom of the window

□ Custom cut pipe insulation to fill bap and prevent mortar from falling out.

TIP: Use pipe insulation or foam backer rods to keep spray foam or mortar from falling through back side.