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roof vents and other protrusions to prevent leaks. Look for cracks or gaps that could allow water to seep in. Repair and cracks with roofing caulk. There are several flat roofing systems in common ...

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machine screws. Measure out a square slightly larger than the base of the vent cap, the part that sits flat on the roof. Use a flat pry bar (sometimes called a Wonder bar) to gently pry up the ...