APP roofing membranes roofing membranes. APP membranes are applied using a torch. The back of the sheet contains additional asphalt, which, when heated, bonds to the substrate. This method is particularly great for residential homes as it uses membranes and hot bitumen. APP polymer-modified bitumen membranes are torch-applied.
Generally, APP roofing membranes impart a "plasticized" quality to asphalt, while SBS roofing membranes add a "rubberized" quality to the material. SBS polymer-modified bitumen membranes are often self-adhering, meaning they come equipped with an adhesive backing.
APP roofing membranes, known as APP-modified bitumen, are a popular choice for flat roofing systems. Contractors typically apply these membranes to asphalt using a torch, a process reminiscent of mopping, as the contractor spreads the membrane across all sections of the roof. After application, you can opt for a smooth surface or choose to add granules. APP membranes have increased effectiveness because the back of each sheet contains extra asphalt that, when heated, bonds securely to the substrate. This method proves especially advantageous for smaller, more intricate roofs, as torch-application of an APP membrane requires less space and equipment compared to the use of hot bitumen. APP polymer-modified bitumen membranes are commonly heat-welded or torch-applied.
Polyglass' SBS (Styrene-Butadiene-Styrene) modified asphalt roofing membranes are reinforced with polyester and/or fiberglass mat, providing superior flexibility, excellent tensile strength, and dimensional stability. These SBS modified bitumen membranes are designed to be integral components of multi-ply flat roofing systems.