CertainTeed 
manufactures membrane roofing for low slope roof applications of any size or type. These premium quality materials include a variety of APP and SBS Modified Bitumen and BUR (built-up roofing) materials and application methods include hot asphalt, cold adhesive, torch or self adhered.
GAF
Founded in 1886, GAF is the largest roofing manufacturer in North America. GAF offers a variety of built-up roofing options including GAFGLAS® metric BUR, which helps to reduce installation costs while tackling the most demanding roof applications; fire barriers; and Metalastic®, M-Weld®, and Lexsuco® accessories to speed installation and improve finished quality.
Henry Company 
Henry cold applied built-up roofs include a Monolithic® surface, a unique process that combines asphalt emulsion with chopped fiberglass for a tough, long lasting and sustainable roof. System is available with heavy-duty glass or polyester plies. Can be finished with aluminum, a white Cool Roof, granules or gravel.
TAMKO Building Products
TAMKO® offers a variety of fiberglass, organic and SBS-modified base sheets for use in built-up roofing applications. All are designed for flexibility, tensile strength and high performance under demanding weather conditions. They also allow for easy application.
4specs Discussion Forum - Great place to ask questions about specifications, products and technical data. Free - no registration required to read or post (subject to moderation).
See also:
07 2200 - Roof and Deck Insulation
07 5200 - Modified Bituminous Membrane Roofing
07 5300 - Single Ply Roofing (Elastomeric and Thermoplastics)
22 1435 - Roof Drains
CertainTeed
manufactures membrane roofing for low slope roof applications of any size or type. These premium quality materials include a variety of APP and SBS Modified Bitumen and BUR (built-up roofing) materials and application methods include hot asphalt, cold adhesive, torch or self adhered.
GAF
Founded in 1886, GAF is the largest roofing manufacturer in North America. GAF offers a variety of built-up roofing options including GAFGLAS® metric BUR, which helps to reduce installation costs while tackling the most demanding roof applications; fire barriers; and Metalastic®, M-Weld®, and Lexsuco® accessories to speed installation and improve finished quality.
Henry Company
Henry cold applied built-up roofs include a Monolithic® surface, a unique process that combines asphalt emulsion with chopped fiberglass for a tough, long lasting and sustainable roof. System is available with heavy-duty glass or polyester plies. Can be finished with aluminum, a white Cool Roof, granules or gravel.
TAMKO Building Products
TAMKO® offers a variety of fiberglass, organic and SBS-modified base sheets for use in built-up roofing applications. All are designed for flexibility, tensile strength and high performance under demanding weather conditions. They also allow for easy application.
Related Associations and Reference Organizations