Built-Up & Single-Ply Roofing Manufacturers:
Carlisle Syntec
Firestone Building Products
Johns Manville
GenFlex
Duro-Last
FiberTite
Soprema
Metal Roofing, Shingle & Slate Roofing Manufacturers:
ATAS International
Englert
Firestone Metal Products
Pac-Clad
Merchant & Evans
CertainTeed (SELECT ShingleMaster)
GAF
Vermont Structural Slate