Im gutting and remodeling my 5x7 full bathroom this weekend. One lingering question pertains to the sheet rock methods. I've seen DuraRock used on many jobsites, but dont quite know the requirements. Since its such a small bathroom, am I safer just using DuraRock for the entire room, ceiling included? The bath will have a surround as well, do i need to put any special sheetrock behind that? I realize that i need some sort of rock behind the surround to increase durability/stregnth. Thanks ahead of time!