Shingles need to be replaced every 10-30 year depending on wear and their type. It just seems so uneconomical and such a pain.
I get that metal conducts heat more easily, but couldn’t you just let a thin layer of moss grow on your metal roof and call it a day? Even if they dry out in the summer, I doubt metal + thin layer of dirt would conduct heat more than black shingles
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Cost.
You are looking into a long lasting metal plate, that needs no paint (erosion will kill the paint and give it an awful rusty look. Adding the cost of repaint). So you are left with: aluminum, copper, stainless steel. Not cheap at all.
However, in places with a lot of snow, they are common and very appreciated. It’s really waterproof, meaning you can have a wet snow layer on it for 6 months without a single drop entering and rotting your insulation and structure.
It’s just that most places don’t get wet that often, so some crappy shingles would do the job and cost way less.
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