Yes. One big advantage to metal roofing is its light weight, which means metal roofing can be installed over an existing shingle roof. However, there are some things that you will want to check out before doing it this way. For one, you will need to check with your local building department and ask if this is an approved installation method.
They have great energy savings. They reflect the heat away to make your attic space cooler, reduce your energy use in the summertime.
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