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I think it depends on where you live. I live where we get a ton of rain and it blows sideways. When the metal roofing expands and contracts, it causes the head of the screw to move, thus the neoprene washer moves. It often gets “tweaked” from the movement causing one side of the washer to curl up. This allows wind blown rain to penetrate the roofing system....


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I work for a metal roofing company, and this is a big area of concern for a lot of homeowners. Here's what I can say: based on experience and facts. 8-10 years ago, the fasteners on exposed metal roofing were terrible. They failed CONSISTENTLY. There were very few competing fastener companies and rubber washers cracked and leaked like crazy. And when your ...


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