Modern Torch-On Felt Roof
Torch on felt roofing describes the method of application and are a big improvement on the older pour and roll system. Great strides continue to be made in bitumen and modified bitumen technology such as SBS or APP, resulting in much better resistance to UV damage and cracking. This type of felt roof comes on rolls and is laid with the aid of a very large blow torch that heats and melts the rear of the felt, melting it onto the roof structure below. Typically, it’s applied as a 3 layer system usually consisting of a perforated underlay, a 2mm underlay layer, then thick 4-5mm felt.