Torch down roofing is a commonly used roofing method for large flat or low-sloped surfaces.  Torch down roofing is economical and more commonly used on large commercial and warehouse properties with large low-sloped roof surfaces.  It is called torch down because it requires an open flame during installation.  It is basically a multi-layered roofing membrane system which is sealed through application of heat and flame.  Torch down roofing is a multi-layered roofing system.  There is typically an underlayment layer which is applied first to the roof surface itself and another layer called overlayment is applied on top.  These layers are made of asphalt material called bitumen.  The bitumen is mixed with rubber and plastic material to obtain flexibility and durability.  As torch is applied to the layers, temperature is raised, and this causes fusion of the layers to create a tight waterproof barrier.  The plastic and rubber compounds of membranes provide elasticity and crack-resistance for the roof.  This means the laid-down layers can expand and shrink without cracking during hot and cold seasons and provide years of water-tight barrier against hot sunny months of the summer as well as cold and rainy months of winter. Torch down roofing typically requires regular maintenance every few years through application of additional sealants and reflective coating to extend its useful life. An advantage of torch down roofing is that add layers can

be applied over the years without need for removal of previous layers and this creates a multi-layer of protection.