This house was built in 1981 and has a type of fiberboard siding with a stucco smear coat. The siding is said to be original and I was surprised it wasn’t water damaged more than it was. Most of the fiberboard I’ve seen just falls apart in the damaged areas. I’m wondering if this is a specific type of board made for taking the stucco coat. The damaged areas had about 14% moisture and was still holding together.