Flashing is usually aluminum or galvanized steel that’s used over joints in a roof and wall construction to prevent water seeping in and causing damage. Depending on the style of your home’s roof, you probably have it in the valleys, around the chimney and pipes, and around any dormer windows or skylights. Most damage shows up either in flashing that’s deteriorating due to weathering and oxidizing, or in flashing that has come loose. If your flashing needs repairs, consider giving

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