Quote Originally Posted by GitDaGrease View Post
I have never personally used it but I have looked at it. I would not go with anything under 3/8 of an inch thick. The hardy backer is really good stuff for putting on walls. Just be sure that if you cut it or any other type of crete board with a power saw to be sure and wear a mask man, the dust that you will generate is not a good thing to inhale.
I would also recommend having someone there holding a shopvac wand to suck up as much dust as possible while sawing any of these materials.