Bitumen Roll is a polymer modified bituminous waterproofing membrane, manufactured from a mixture of Bitumen and Polymers, which are blended together to obtain good waterproofing properties.  Bitumen Roll is unfolded on the site and laid firmly on surface with tar-based adhesives using blowtorches. A layer of bituminous water proof membrane is laid over the structural roof which acts as a shield against the seepage of water onto the roof.