How can you tell if the siding has asbestos in it. I have approx 35yr old home. The siding seems to be some type of cement board and backed with some sort of fibre type material. Looks look it could be wood fibre (backside of siding). Siding is approx 1/2" thick. Approx 1/4" cement board like over 1/4" fibre board.
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