Weep holes in glazing installations should be at least how many inches in diameter?

Weep holes are critical in glazing installations because they allow water that penetrates the glazing system to drain away, preventing accumulations that could lead to leaks or damage. The minimum diameter of weep holes is set to ensure that they effectively drain water without becoming blocked by debris or dirt.

A diameter of 3/8 inch is generally sufficient to facilitate the proper drainage of moisture while still being small enough to minimize the risk of clogging. Holes that are too large could allow too much water in, while those that are too small may not drain effectively. Thus, the choice of 3/8 inch strikes a balance between functionality and practical construction considerations. This size adheres to typical industry standards for weep hole dimensions in glazing systems.