Why do my windows whistle when it's windy?

Whistling windows are typically caused by air leaking through gaps in the window frame, weatherstripping, or sash, creating a sound as wind passes through these small openings at high speed.

The most common culprits are worn or damaged weatherstripping around the window sash, gaps between the window frame and the wall, or warped window components that no longer seal properly. Even small gaps of just a few millimeters can create that distinctive whistling sound when Ottawa's strong winds hit your home. Older windows are particularly prone to this issue as their sealing components deteriorate over time.

Temperature changes in Ottawa's climate make this problem worse - the freeze-thaw cycles cause window materials to expand and contract, gradually creating larger gaps. Single-pane windows and older double-pane units are especially susceptible because they lack the advanced sealing systems found in modern windows. The whistling often becomes more noticeable during winter months when the temperature differential between inside and outside air is greatest.

Start by inspecting your weatherstripping - look for cracks, gaps, or areas where the rubber or foam sealing has pulled away from the frame. You can temporarily test for air leaks by holding a lit candle or incense stick near the window edges on a windy day - the flame will flicker or smoke will move where air is entering. Check both the sash weatherstripping and any caulking around the exterior window frame.

Simple weatherstripping replacement can often solve minor whistling issues and costs just $20-50 per window. However, if multiple windows are whistling or the frames themselves are warped, it may be time to consider window replacement. Modern triple-pane windows with advanced weatherstripping systems virtually eliminate air infiltration and the associated noise. For a comprehensive assessment of your window air leakage issues, request a quote from Ottawa Window Pros to explore both repair and replacement options.

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