Every window assembly is designed to manage water — not just exclude it. When drainage components fail, water has nowhere to go but inside. We restore proper drainage function to stop leaks at their system source.
This is a drainage problem, not just a sealing problem. Let us diagnose and correct it properly.
A common mistake is sealing weep holes or over-caulking sill areas to stop visible water. This traps water inside the window assembly and accelerates rot, corrosion, and seal failure. Correct drainage — do not block it.
Window drainage system failures are among the most overlooked causes of chronic window leaks.
Weep holes in window frames allow water that enters the track to escape outside. When blocked by debris, paint, or improper caulking, water backs up and overflows into the interior.
A sill pan is the first line of defence at the window base. Missing, cracked, or poorly fitted sill pans allow water to pool and penetrate the rough opening directly.
Window sills must slope outward to direct water away from the building. A level or inward-sloping sill causes water to pool at the frame and infiltrate over time.
End dams on sill pans prevent water from running off the sides into the rough opening framing. Missing or failed end dams lead to concealed water damage in the wall cavity.
Multi-chamber window frames have internal drainage channels that route water to weep holes. Blockages in these channels cause water to accumulate inside the frame.
Improper grading, blocked gutters, or downspout discharge near windows can direct excessive water toward window assemblies, overwhelming their drainage capacity.
We inspect all drainage components — weep holes, sill pans, end dams, and frame channels — to identify blockages, defects, and design deficiencies.
Blocked weep holes are cleared, enlarged if undersized, and protected with appropriate insect screens that allow drainage without debris entry.
Damaged sill pans are repaired or replaced. Where sill pans are absent, we install appropriate pan flashing with proper end dams and drainage outlets.
Sills and sill pans are shimmed or rebuilt to achieve the correct outward slope, ensuring water drains away from the building envelope.
We test the corrected drainage system by simulating rainfall conditions and verify that water is correctly routed through weep holes to the exterior.
A properly draining window system requires far less sealant maintenance and lasts significantly longer. Contact us today to restore your windows to correct function.