Roof Torch-on is a type of roofing system that involves the use of a modified bitumen membrane that is applied to the roof using a propane torch. It is typically used for flat or low-slope roofs and provides a durable, long-lasting waterproofing barrier.During the installation process, the Roof Torch-on membrane is unrolled onto the roof and then heated with a propane torch to activate the adhesive on the underside of the membrane. As the membrane is heated, it bonds tightly to the roof surface, creating a seamless, waterproof barrier. The seams between the individual sheets of membrane are also heated and fused together using the torch, creating a strong and durable bond.Roof Torch-on is a popular choice for flat or low-slope roofs because it is relatively easy to install, provides good resistance to weathering and UV radiation, and can last for many years with proper maintenance. However, it is important to hire a professional roofing contractor who is experienced in the installation of torch-on roofing membranes to ensure that the installation is done correctly and safely.