I have siding that looks VERY similar. But it's not wood as some of it has fallen off and I can see it is some type of other material. House was built in the 1950's, siding may be from the 60's or 70's. A few people say it is asbestos siding. Are they correct? Also, what type of siding can I use to patch the missing siding? I don't want to reside the whole house!