![]() When firmly in place, flashing tape effectively prevents water from reaching the wood of the rough opening. Flashing tape: This self-stick membrane comes in 4-inch and 6-inch rolls and is cut to fit along the inside edge of the rough opening (the frame constructed in the wall to hold the window).Drip cap: Available in Z-shaped sheet metal strips, drip cap is designed to fit over the top of a window, much like a small canopy, to shed water outward and keep it from seeping behind the window.Vapor barriers are also frequently used for flashing windows at the time of their installation. ![]() The three main types of window flashing are drip cap, flashing tape, and molded vinyl, and each type is meant for different parts of a window. Several types of flashing can be installed in a single window. Each successive layer overlaps the layer below to direct the flow of water down and away. ![]() Flashing-whether it’s on a window, roof, or chimney-is designed to be installed in a layered sequence, similar to the way shingles are layered on a roof. While a home’s siding serves as its main source of protection against the elements, windows and other penetrations through the siding require additional waterproofing. Window flashing protects the window-and the house-from water damage. If you’re concerned about your home’s windows or simply curious about window flashing, read on to learn the basics about this key component to keeping your home watertight. Over time, even a tiny gap around a window that allows water to enter can result in mold growth, wood rot, and structural damage that can require costly repairs.
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