a weep hole is a small opening that is strategically placed in exterior walls, retaining walls, or other structures to allow for the drainage of water. These openings are essential for preventing the accumulation of water within the wall cavity, which can lead to moisture-related issues such as mold growth, structural damage, or deterioration of building materials.

Weep holes are typically found at the bottom of brick veneer walls, just above the flashing, and are spaced at regular intervals. They allow any water that has penetrated the outer wall to escape, ensuring that the internal cavity remains dry. This is particularly important in Australia, where varying climate conditions can lead to significant rainfall and moisture exposure.

In addition to their primary function of water drainage, weep holes also provide ventilation to the wall cavity, helping to equalize air pressure and further reduce the risk of moisture buildup. Proper installation and maintenance of weep holes are crucial for the longevity and integrity of a building's structure.