Torch-on membrane is a roofing material commonly used on buildings with a low sloped or flat roof pitch. The material has a non-woven reinforced polyester reinforcing mat which is coated and impregnated with SBS modified bitumen. The finished cap sheets surface is embedded with ceramic mineral granules to provide U.V. protection. Commercial Torch-on Re-roofing generally has a more installation components involved versus residential torch-on re-roofing. For example, commercial buildings usually need to be insulated on top of the roof with installing a vapor barrier underneath. Torch-on SBS membranes are installed using a controlled flame from a torch supplied by propane. Torch-on is generally installed with 2 ply’s. A fireproofing membrane or protection board is installed first then the two ply’s of torch-on can be installed. The first ply of torch-on is smooth on both sides while the second ply’s topside has embedded ceramic mineral granules to provide U.V. protection.
Torch-on SBS roof membranes are very durable and have low maintenance. Finished torch-on has a complete water tight seal and when installed correctly can actually hold water without any issues. Modifications to torch-on such as installing a new skylight are easily done.