Membrane roofing refers to a number of different roofing materials.
Organic membrane roof.
Anything on the roof that works to create a low spot where water will puddle is death on a stick for a flat roof no matter what the roofing membrane is.
Membrane roofing for flat roofs.
Roofing felt types available.
Historically the most common type was a tar and pitch membrane but newer synthetic materials are quickly taking over.
Designed to repair roof leaks and add strength.
For a flat roof these newer synthetic membranes offer a great leak proof option.
Asphalt cotton membrane unrolls easily for wrinkle free smooth application and has an elastic interlocking system for a firm mechanical bond between coatings.
To repair leaks and add strength to your roof this 4 in.
Guide lines have been placed on the top surface for easy alignment of asphalt shingles.
Organic roofing materials this saturated felt is a uniform flexible felt of organic fibers impregnated with an asphalt saturant.
A wide variety of organic roofing material options are available to you such as astm aisi.