We are pleased to announce that AQUAPANEL® Cement Board Rooftop 6mm and AQUAPANEL® Cement Board Rooftop 12.5mm are now FM approved as a cover board with mechanically attached membranes (class 4470 - Single-Ply, Polymer-Modified Bitumen Sheet, Built-Up Roof (BUR) for Use in Class 1 and Noncombustible Roof Deck Construction). The approval identification is PR461397.