Window Weep Holes Explained

Weep Holes

• All through the year in most climates, some type of water affects windows. In spring, summer and fall, it's rainwater; in cold climates, ice and snow in the winter. The weep hole permits moisture to drain away from the window sill. Certain window frames offer additional protection. Metal bands wider than the weep holes overlap them, protecting the structure from rains driven by strong winds.

Windows

• Single, double-hung and sliding windows generally include weep holes. To locate weep holes on sliding windows, look in the sill track and under the screen, as well as the operating and sliding sash. When painting, repairing or remodeling, make sure the weep holes are not accidentally caulked or painted over. A closed weep hole is ineffective. Also make sure the window is installed correctly. If replacing a window, pay attention to the location of the weep holes so they are not erroneously installed facing the interior or at the top of the window.

Warning

• Weep holes aren't only found on windows. Many doors and walls also contain them. If you live in a dwelling with brick veneer, consider installing a weep hole vent cover. Though not usually necessary for windows, weep holes on certain exteriors such as brick veneer are a major entryway for unwanted critters in the house, such as snakes, mice and insects. Due to the location and size of a window weep hole, it may only be an entry for smaller insects, such as ants.

Maintenance

• Check weep holes periodically to ensure they remain free of dirt and debris. Make it a part of a regular home-maintenance routine by cleaning weep holes whenever you clean windows. It is especially important to clean out weep holes before the wet weather season in your region. If the holes clog, clear out the debris with a soft brush or screwdriver. Be sure to brush leaves, dirt and dead insects off the window sill to avoid clogging weep holes.