Why roof tiles exist. I understand why we don’t have flat roofs, but why do we have hundreds of tiles that sort of overlap each other and can be pulled or blown off easily?
Why aren’t roofs like a giant tent, still A shaped but each side is just a big sheet of whatever weatherproof material we got?
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In addition to what others have said, there the issue of fastening it to the roof. With tiles or shingles, you can nail them down on the top half, and then cover up the nail heads with the tile/shingle above it. With one big sheet, you have nothing to cover the nails. Now either you need to use some other method like an adhesive (can get more complicated making sure it’s right) or cover nail holes with something like caulking (you’ll use *a lot* of caulking, and it tend to break down and need redone sooner than other materials).
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