Modified Bitumen Roll Roofing

Smooth surface can be used as a cap or interplay membrane ideal for new roofs and repairs of built up or sbs modified bitumen systems meets astm d6222 type i grade g.

Modified bitumen roll roofing.

It resembles regular asphalt roll roofing but is more durable and much more resistant to drying out. Modified bitumen mb roofing is an asphalt based roofing system similar to built up roofing bur designed for structures with low slope roofs. Modified bitumen costs more than asphalt roll roofing but the increased longevity more than justifies the additional price. Gaf liberty 3 ft.

Modified bitumen roofing membranes appeared first in europe in the mid 60s and since have been used in the us and canada since the mid 70s. Modified bitumen roofing was designed for use on buildings that have a low slope or flat roof. Roll roofing and modified bitumen are both suitable for low slope roofs. For that reason future roofs are likely to employ hot air welding cold press adhesives and roll membranes with self sticking edges.

Modified bitumen is approved for flat roofs with minimal slope but roll roofing is not viable below a 2 12 pitch two inches of rise for each twelve inches of horizontal run with exposed nails or a maybe little lower with concealed nail installation. The mat is coated with durable app modified bitumen and is designed for torch down application by professional roofing contractors. Today modified bitumen mb is king with cap membranes torched on to fuse them to fiberglass reinforced interplies or base coats. Advantages there are a wide range of methods available for installing modified bitumen roofing from using a hot torch to using a sealant backed peel and stick rolls.