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How to Detect and Repair Window Leaks

Leaking windows aren’t merely inconvenient–they can cause serious damage to your home and expose your interior to drafts, moisture and even mold growth. In this post, as a trusted provider of casement windows and other window styles, we offer some tips on detecting and repairing window leaks.

Here are some signs that you should watch out for to determine whether you have a leaking window.

Water on the Bottom of the Frame

This usually appears as brown stains on your window frame. Apart from being a cosmetic issue, this problem also indicates that your window isn’t able to keep water out of your home. The panes may not be fitted properly inside the window. If this is the case, you may be able to fix the issue using caulking.

Water Coming Through the Window in All Directions

If you notice that water seeps through your windows in all directions every time it rains, this could mean that your window was not correctly installed. You may be able to repair this using caulking as well. However, if your window is old and worn down, you may need to consider window replacement.

Clogged Weep Holes

Weep holes are usually found on the bottom of a window frame. Their main function is to drain precipitation that collects in the window tracks. If the weep holes become clogged, they won’t be able to serve their purpose, causing leaks. You fix this by clearing the clogged-up holes. Check for fallen leaves or insect corpses that may have become stuck in the weep holes. You can use a cotton swab or a wire to help clean the holes thoroughly.

Damaged Window Seal

Another part of your window to inspect carefully is the window seal. Typically, the window glass is sealed to a vinyl or rubber gasket, which can loosen with age. You need to consider replacement when this happens.

Renewal by Andersen of Seattle offers a wide selection of replacement windows, including bay windows, double-hung windows and sliding windows among others. With our expertise, you can be sure of quality results. Call us at (206) 777-0954 or fill out our contact form to request a free estimate. We serve homeowners in Seattle.


"Our windows are beautiful, thank you so much!"

Jess | WA
November 30

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