Windows That Let in Light for a Basement

Egress Windows

• Egress windows are often used in a basement wall to allow more light into the space. They are larger windows than the typical small rectangles often installed in basements. The egress windows open so they also provide a safety element by creating an escape route in case of a fire. Local requirements may vary, but the typical minimum measurement requirements for egress windows are 20 inches wide, 24 inches high and an opening of at least 5.7 square feet. The egress window should be no more than 44 inches off the basement floor with a large enough window well outside to allow a person to climb out.

Other Window Types

• If you already have exit points in the basement and simply want to let in more light, smaller windows are a possibility. An awning window is usually a small rectangle with a window panel that swings outward to open with the hinge positioned at the top of the window. A hopper window opens the opposite way, with the hinge placed at the bottom of the window. If you don't want the window to open, you have the option of installing a glass block window. This type allows light to filter in while providing privacy.

Considerations

• Building codes in your local area regulate the installation of windows in the basement. If your basement includes a bedroom or sleeping area, the code typically requires that the room have at least two exits, one of which may be an egress window. The codes specify the size and location of the escape windows. The building codes may also specify general placement and structural requirements for adding windows into the foundation of the home. Another consideration is the amount of space above ground level of your basement walls. A walk-out basement gives you plenty of room for large windows, while a basement that is mostly underneath the soil line limits the size or requires you to dig out and build a window well.

Tips

• Walk through your basement during daylight hours to figure out where you need more light in the basement. Note the darkest areas that could most benefit from a new window. Look for ways to emphasize the light from the existing windows. For example, you might rearrange furniture that is currently blocking one of the windows or take down window coverings so the full amount of light is allowed inside. On the exterior of the home, trim bushes or rearrange landscaping that blocks light from going into the basement windows. Before adding a deck or similar outdoor structure, consider how it will block the light into the basement. Adjust the placement if possible to avoid light reduction.