A weep hole is a small opening left in masonry, veneer, or certain siding systems, specifically designed to allow any moisture that penetrates behind the exterior finish to drain and escape rather than accumulating and becoming trapped within the wall assembly.
These small openings are typically placed at the base of brick veneer, stone veneer, or similar wall systems, working in coordination with the drainage gap behind the material to provide an actual exit point for water that the gap has collected.
Because weep holes are small and sometimes barely noticeable, they’re easy to accidentally block during landscaping, painting, or other exterior maintenance work, a mistake that can compromise the entire drainage system’s effectiveness.
What Does a Weep Hole Involve?
- Small openings at the base of veneer or masonry walls
- Coordination with the drainage gap or cavity behind the exterior finish
- Placement typically every couple of feet along the wall’s base
- Sometimes fitted with small vents or covers to exclude pests
Why Are Weep Holes Important?
Without functioning weep holes, moisture that penetrates behind brick, stone, or similar veneer materials has no clear escape path, potentially accumulating within the wall cavity and eventually causing hidden damage to the structural framing behind the otherwise attractive and durable exterior finish. This drainage function makes weep holes a critical, if visually inconspicuous, component of the overall wall system’s moisture management strategy.
Homeowners should be careful not to inadvertently block weep holes during landscaping, mulching, or exterior painting projects, since covering these small but functionally important openings can undermine the veneer system’s entire drainage design without any obvious immediate consequence until moisture problems eventually develop.
Weep Hole vs. Weep Screed
A weep hole is a small individual opening in masonry or veneer systems. A weep screed is a specific continuous metal component used at the base of a stucco wall, serving a similar drainage function but through a different, continuous design rather than individual spaced openings.