You can protect torch down roofs by coating them to protect from ultraviolet rays, and you will need to reseal it every few years. Other than that, there’s not much that needs to be done to maintain the roof aside from clearing off debris regularly and patching any holes that develop.

Torch down roofing is so named because it requires an open-flame propane torch. In this installation method, sheets of modified bitumen are rolled out onto the roof, and a roofing professional uses a hand-held propane torch to heat the material and adhere it to the surface.

How long will a torch down the roof last?

Sheets are “torched down” so they adhere to the roof and seams are joined. These are well suited to most climates, though heavy rain and snowfall can compromise the life expectancy of torch-down roofing systems. On average, these roofs last 15-20 years and represent a great value for most buildings with flat roofs.