There's a room in my house that has walls made of a material that I've always thought was weird. It's not like normal drywall. Recently, I pulled up the base boards I got a better look at the bottom of the walls that had previously been covered by the base boards. I started wondering...How do I know if the walls are made of a safe material? I started thinking about it and am wondering if they could be made with asbestos.
The material is like an insulted board, made of some brown or black fibrous material, with a thin, wooden outer shell (like paper on drywall). It could be totally safe, I just don't know.
Is this a common type of wall board in older houses? Is it safe? I can't seem to find any resources to help me identify the kind/brand of wall board and whether or not it is safe. Can you provide some resources that will help me determine if this wall board is safe?