Weep Holes / Window Drainage System
Many windows use weep holes or internal drainage channels to direct incidental water from the sill or track back to the exterior.
Is Water in a Window Track Normal?
In certain conditions, especially wind-driven rain, it is not uncommon for some water to enter a window track. A properly designed drainage system provides a path for that water to drain back outside. Water in the track does not automatically mean the window is leaking.
Do All Windows Have Visible Weep Holes?
No. Many windows have visible weep holes, while some newer designs use different drainage systems or do not have traditional visible openings.
Keep the Drainage System Clean
It is very important to keep weep holes and drainage channels clean. Dirt, insects, debris, paint or caulk can block the intended drainage path.
When Is Water a Concern?
Water does not drain from the track.
Water overflows to the interior.
Staining, swelling or deterioration develops around the opening.
Water appears around the wall or frame rather than in the designed drainage area.
Water around a window can also originate from flashing, siding, caulking, roofing or installation conditions.
Related Window Terms
Window Sill • Window Frame • Weatherstripping • Window Sash • Window Installation