The membrane is made of a polyester mat impregnated with asphalt bitumen that is modified with a rubberized polymer.
Modified bitumen roll roofing.
Gaf liberty 3 ft.
Roll roofing and modified bitumen are both suitable for low slope roofs.
It resembles regular asphalt roll roofing but is more durable and much more resistant to drying out.
Modified bitumen roofing was designed for use on buildings that have a low slope or flat roof.
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.
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 mb roofing is an asphalt based roofing system similar to built up roofing bur designed for structures with low slope roofs.
Get free shipping on qualified sbs modified bitumen roll roofing or buy online pick up in store today in the building materials department.
Today modified bitumen mb is king with cap membranes torched on to fuse them to fiberglass reinforced interplies or base coats.
Modified bitumen costs more than asphalt roll roofing but the increased longevity more than justifies the additional price.
The mat is coated with durable app modified bitumen and is designed for torch down application by professional roofing contractors.
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.