What is the function of weep holes in wall flashings?

Weep holes serve a crucial function in wall flashings by providing a means for moisture that may have penetrated the wall assembly to escape. Their primary purpose is to ensure that any accumulated water within the wall can drain out effectively, reducing the risk of water damage, mold growth, and deterioration of the building materials. By facilitating this drainage, weep holes help maintain the integrity and longevity of the wall system.

The design and placement of weep holes are typically found at the base of walls where moisture is likely to collect, ensuring that gravity aids in the efficient evacuation of water. This function is essential for managing moisture levels and promoting a healthier building environment.