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
In: 15
Many are. Here in SoCal I’ve got a concrete shingle roof, with roughly 1″ thick concrete shingles. Lifespan of about a century, though some do break due to thermal expansion now and then. Very low maintenance, good in fire areas. Can get mossy in damper areas, but even without that they’re pretty slow to heat up and cool down so they add a lot of [thermal mass](https://en.wikipedia.org/wiki/Thermal_mass).
The downside is it’s a heavy roof, so you need to be able to carry a higher dead load. But if the home was designed for that it’s not a big deal. They’re more expensive to build than shingle, but cheaper over time.
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