Built-Up & Single-Ply Roofing Manufacturers:

Carlisle Syntec
Elevate
Johns Manville
Sika Sarnafil

Metal Roofing, Shingle & Slate Roofing Manufacturers:

ATAS International
Englert
Elevate Metal Products
Pac-Clad
CertainTeed (SELECT ShingleMaster)
GAF
Vermont Structural Slate