What is typically required when any part of a window or opening is below grade?

When any part of a window or opening is below grade, the typical requirement involves the use of window wells. Window wells are essential because they serve multiple important functions. They prevent water from accumulating around the window, which could lead to potential water damage in the interior spaces. These structures create an effective drainage system that directs water away from the window itself, thereby reducing the likelihood of leaks and mold growth.

Additionally, window wells enhance safety by ensuring there is adequate egress for occupants, especially in a basement environment. In many building codes, particularly for habitable basements, the presence of a window well is required to provide a safe escape route in an emergency, as well as to allow natural light into the space. This requirement addresses both functional safety and aesthetic considerations regarding daylight access in below-grade environments.