Membrane manufacturers Manufacturers, wholly owned subsidiaries and dedicated distributors of single ply membranes.
 
Associates Manufacturers of ancillary components in the roofing system such as thermal and acoustic insulation, vapour control layers, decking, lightning protection, drainage, plant and safety equipment.
 
Affiliates Professional bodies, partner trade associations and suppliers of raw materials and process goods to the industry.  
 
Contractors Roofing contractors licensed or approved to receive and install the products of one or more of the membrane manufacturers.
 
Trained installers Individuals who hold a current certificate of training in the installation of the products of one or more of the membrane manufacturers.