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Question DetailsAsked on 10/4/2016

water leaking in window from above

Last week we had a rain event with wind which caused one of my windows to leak profusely. Not sure how to stop it from leaking especially with the possibility of Matthew coming our way.

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1 Answer


Usually, a profuse leak (barring actual broken glass) is caused by missing or totally failed flashing or caulk over the top of the window frame where it meets the house, or a bottom track (the bottom track or trough that the moving window units seat in) that has plugged drain holes or an inner lip or guide that is loose or missing so water is coming in from the track to the inside.

Look for missing trim strip, weatherstrip, etc - if leaking profusely there is probably a component in the waterstop system that is missing or perhaps pulled away from the window - either where the flashing/caulking keeps water on the walls from getting into around the window frame, or where the window unit itself fits into the window frame (moving or fixed window unit).

Also, check bottom track for any blocked up week holes that might have caused water to back up in the bottom of the window unit. Sometimes they lead out through the outer lip of the track onto the outer sill, sometimes in non-wood windows they lead down into the interior of the sill and drain out through voids in the sill through weepholes in the front or more commonly under the front edge of the sill. Also on the bottom track or slot - be sure the inner lip of the track has not come loose, letting water in the track leak into the room over the inner sill.

For a repair some Handymen are good at this - Window and Door companies would be the best at fixing it but many do not do small service calls like this anymore and would say replace the entire window instead.

About Matthew - you could (if able to get up on ladder to check it out) just caulk all around the window frame where there is any visible gap (except for the drip/weep hjoles or openings in the flashing or sill under the bottom of the window, which let any water in there drain out), and run a small bead of latex (easier to remove later) caulk onto the gaps around window unit - between it and the frame, realizing it will have to be removed before any opening unit can be moved after the storm. Or put some compressible foam weatherstrip around the frame and screw a plywood sheet over the frame to cover the window entirely till after the storm passes and the repair can be done right. If you do this, be sure to leave a couple of small gaps in the weatherstrip at the bottom to let out any water that gets in there.

If logged in (as a member or registered user) you can also see more similar questions with responses right below this one, and more links to other similar questions about window leaks under them.

Answered 4 years ago by LCD

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