Torch down roofing is a type of roofing that consists of levels of modified bitumen adhered to layers of fiberglass, designed for low-angle and flat roofs.
The product gets its name from the method of installation. The part of the material in contact with the sheathing underneath is melted with a torch in order to seal the material. This helps to provide a secure hold and creates a waterproof seal that can prevent unwanted leaks.
This roof prevents moisture build-up and it requires very little maintenance. If installed correctly, torch down roofing can last a very long time. Two-layer systems tend to last around 15 years while three-layer torch down roofing can last 20 years or longer.