Basement windows are not found in every home, since not every home has a basement. But for homes that do feature a basement, there are several important factors to consider when deciding upon the best options in basement windows.
Since basement windows are located at the lowest level in a home and are sometimes even below ground level, they must be watertight to prevent moisture from seeping into the basement. In addition, basement windows are often exposed to moisture for long periods of time; wood basement windows are susceptible to rot, mold, and mildew, and metal basement windows could rust. Make sure that you choose basement windows that can withstand high levels of moisture.
Basements are known for a lack of natural light; consider installing windows with larger panes of glass to allow extra light into the room. In addition, basements have a tendency to grow musty due to their low use and underground location, so basement windows that open for ventilation can lead to improved air quality within the room.
Safety is a major concern when it comes to basement windows; the International Residence Code specifies minimum sizes of basement windows to allow occupants to escape in an emergency or for firefighters to enter the basement in case of a fire. This code specifies a minimum width of 24 inches, a minimum height of 24 inches, and a minimum net opening clearing of 5.7 square feet. Check with your local building authorities to determine the additional code requirements for basement windows in your area, as well.
When choosing your basement windows, be sure to think about selecting energy-efficient materials. Choosing well-insulated window frames in conjunction with thermal glass panes will help to reduce your home's energy costs.
Security is another important factor when it comes to selecting optimal basement windows. Burglars often use a basement window to enter a home due to the ease of access, so windows in the basement need to be sturdy, be in good condition, and have secure locking mechanisms. In addition, if your home has an alarm system as part of its security, be sure that all of the basement windows are wired within the alarm circuitry.