What Are Window Weep Holes?
You notice two little slots near the bottom of your window frame.
They look like gaps.
Your first instinct:
“I should caulk those.”
Don’t do that until you know what they are.
Many windows include small drainage openings called weep holes.
Andersen defines weep holes as small exterior openings designed to allow water to drain from a window or door system.
They are not necessarily defects.
They can be part of the drainage design.
How Does Water Get Into a Window Track?
Windows deal with exterior weather.
During:
- Heavy rain
- Wind-driven rain
- Snowmelt
small amounts of water can enter portions of the exterior track or drainage chamber.
A properly designed window gives that water somewhere to go.
It moves through the frame drainage path and exits through the weep openings. Current Canadian window guidance describes this as a normal part of window water management.
What Happens if the Weep Holes Are Blocked?
Water may remain trapped in the track.
Possible warning signs include:
- Standing water
- Staining
- Persistent dampness
- Musty odour
- Water appearing where it shouldn’t
The problem might simply be debris.
Or it may involve a larger drainage or installation issue.
Never Automatically Caulk the Bottom Openings
Caulk belongs at specific perimeter joints.
It should not be used indiscriminately.
If you seal the engineered water exit, you’re not stopping water from entering.
You may simply be stopping it from leaving.
That is why homeowners should understand the window’s design before “fixing” a small opening.
Can You Clean Weep Holes?
If the openings are visibly obstructed by:
- Dirt
- Paint
- Debris
gentle cleaning may restore drainage.
Avoid:
- Drilling random new openings
- Enlarging existing holes
- Forcing sharp tools deep into the frame
Window drainage design varies by manufacturer.
If you’re unsure, consult the product information or have the unit inspected.
When Is It More Than a Blocked Drain?
Call for assessment when:
- Water reaches interior finishes
- Drainage remains poor after cleaning
- The frame is damaged
- Water staining keeps returning
- You suspect installation problems
Envirotech installs multiple replacement-window styles, including casement, hung, slider, awning, bay/bow and basement units.
Not Every Hole in a Window Should Be Sealed.
Sometimes that tiny opening is exactly how the system keeps water out of your wall.
Seeing water sitting in your window tracks or recurring moisture around the frame? Envirotech Exteriors can determine whether you’re dealing with blocked drainage, failed seals or a larger window-installation problem.