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Likewise, how do you stop a window from leaking?
To prevent leaks, caulk the window where it meets the exterior siding. If the window is surrounded by wood trim, use a high-grade polyurethane caulk to seal all gaps between the trim and the siding (and the trim and the window). Take special care to seal the top side of the top piece of trim.
In this regard, should you caulk the bottom of a window?
While it may be tempting to seal any and all gaps around your windows, windows require some ventilation to prevent excess moisture from accumulating. Avoid caulking: The window's weep hole: This small hole at the bottom of the exterior frame in windows allows moisture behind the window to exit through the frame.
Window leaks can result from a structural failing elsewhere in the home, such as an opening in the roof, upper floors, or siding. If you notice water stains on the wall above the window or along the top or bottom of the frame, this usually means there is a leak inside the walls.