This 240" x 100' roll super six 6mil clear poly film is for use in applications where large areas require a C.G.S.B. 6 mil vapour barrier (i.e. slab on grade and roofing projects). Its wider width allows for vapour barrier to be applied without multiple joints being required and "W" fold (4 fold) requires less time and labour to completely unfold the entire roll during application. Covers 2000 sq. ft.