Shingles vs bitumen shingles
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In America, they don't use shingles like in Europe, but bitumen shingles. That's why I wondered why they don't use them in Europe?
They are cheaper and lighter, but they don't last as long (25-35 years). How long does a "classic" roof last? Also, bitumen shingles are supposed to be quieter when it rains.
I wonder if photovoltaic elements could be attached to them? Perhaps that would increase the longevity of the protection?
Answers
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I have bitumen shingles on my garden house. All are waterproof.
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Using bitumen shingles you have to re-cover the roof after 25 years. Tile lasts until you like it or you die.
Bitumen shingles only look good up to a certain point.
So for a garden shed it's fine, but for a new house you can certainly imagine something prettier, can't you?