A weep vent is a small opening in brick or masonry walls that lets trapped moisture drain out and helps the wall dry by allowing airflow. It is commonly used in cavity walls, especially near the base of a wall and above windows or doors.

Quick Scoop

Weep vents help prevent:

  • Water buildup inside the wall.
  • Damp, mold, and structural damage.
  • Pests and debris from entering, when fitted with a grille or mesh.

They are often standard in newer buildings, while older homes may not have them.

Simple example

If rain gets into the cavity behind a brick wall, the weep vent gives that water a way to escape instead of staying trapped inside the wall.