TORCH DOWN RUBBER ROOF Installation over Tar and Gravel explained

Explaining the advantages of a Two Ply Torch Down Rubber roof. This is the best roofing system and can be installed over Tar and Gravel and any other roof. Most roofing systems are a single-ply roofing system. TPO, EPDM and Modified Bitumen Torch Down are all single-ply membranes. Of the three different roofing membranes, Modified Bitumen Torch Down is still the best. To increase the life span of a single-ply torch-down, you have to add an additional layer. That would be the Modified Bitumen self-adhering base. When this base and the cap sheet are fused together, then you have a roof that most likely will never ever have to be replaced.