HAAG Certified Reviewer

What is the purpose of weep holes in brick veneer?

1. Add strength to the wall

2. Allow for thermal expansion and contraction

3. Allow access for inspection

4. Allow for drainage of moisture from behind the block

The correct answer is: Allow for drainage of moisture from behind the block

Weep holes in brick veneer serve the essential function of allowing for the drainage of moisture that may accumulate behind the wall. During rain or through condensation, water can build up in the space between the brick facade and the interior wall. If not properly managed, this moisture can lead to damage, such as mold growth, deterioration of materials, or structural issues. Weep holes provide an escape route for this moisture, ensuring that it does not remain trapped within the wall assembly. Strategically located, these holes are typically positioned at regular intervals along the bottom of the veneer wall to effectively manage drainage and promote the longevity of the wall system. While there may be other factors relevant to brick veneer construction, such as accommodating thermal expansion or providing access for inspections, the primary and critical function of weep holes is specifically aimed at moisture drainage.