Bed-Roc is a manufacturer of cement backer board that will not rot in high moisture conditions such as behind tile in tub and shower surrounds. Tested and approved for interior and exterior use as well as use in fire rated wall assemblies. Comes with a one hour fire rating and is classified as a non combustible material. Since 1987, has been supplying Super-Panel, a first-quality backer board, to the construction and renovation industry throughout Western Canada. more... See more text