Window Leaks

Where Windows Leak

Between sash and frame: When the window is closed, water shouldn't get past. If it does, weatherstripping has likely failed or the window isn't closing properly.

Around the frame: Leaks at the perimeter of the window frame indicate caulking failure, flashing problems, or issues with how the window was installed in the wall.

Through the glass: If your sealed unit has failed and the window frame has weep holes, moisture that condenses between panes can drain inside.

Through weep holes: Weep systems drain water from the track, but if they're clogged or the track overflows, water can come inside.

Finding the Leak Source

Water doesn't always enter where you see it—it can travel along surfaces before dripping. We trace leaks to their source:

• Inspect weatherstripping condition and compression
• Check window operation and closure
• Examine exterior caulking and flashing
• Test weep system drainage
• Look for siding or building envelope issues above the window

Leak Repair Solutions

Weatherstripping replacement stops leaks through the sash/frame interface.

Hardware repair ensures the window closes completely and compresses weatherstripping properly.

Re-caulking addresses perimeter leaks where old caulk has failed.

Weep hole clearing restores proper drainage.

Flashing repair may be needed for leaks above the window—we can identify the issue and recommend appropriate contractors if needed.