If you’ve ever looked closely at your brick exterior and noticed small gaps along the bottom row, you might’ve wondered if something was missed during construction. Those openings aren’t mistakes — they’re called brick house weep holes, and they play a critical role in protecting your home from moisture damage.
Most modern homes don’t use solid brick walls. Instead, they’re built with a brick veneer system. This system includes a decorative outer layer of brick, an air cavity behind it, a weather-resistant barrier, and the structural wall beneath.
While this design improves efficiency and appearance, it also means water can enter the system — because brick and mortar are naturally porous.
Moisture that enters the brick veneer needs a safe exit. That’s where brick house weep holes come in. These small openings allow water to drain out of the wall cavity instead of becoming trapped.
Weep holes are usually installed along the bottom course of brick, just above the foundation. You may also see them above windows, doors, and anywhere flashing redirects water outward.
Builders often add mesh or tube inserts to allow airflow while helping block debris and pests.
One of the most common — and costly — mistakes is sealing brick house weep holes with caulk or mortar. While it might look cleaner, it traps moisture inside the wall system, leading to long-term damage.
If insects are a concern, use approved weep hole screens instead of blocking airflow and drainage.
Brick house weep holes may be small, but they’re essential. They quietly protect your home from moisture damage, preserving its structure, appearance, and value for decades.
At SEMCO Homes, attention to details like proper drainage and ventilation is part of building homes that last — not just homes that look good.