Sorry about that. OK, there is some house siding that is made of concrete, though it looks and feels and cuts like wood or other kinds of siding. It is long-lasting and so forth. But I don't know the name of it.
I was wondering, if I took a plank of that stuff, cut it in, say, foot long "shingles" and nailed it to the roof like cedar shingles, would that do the job, would it look good, etc.