RCI, Inc.  -  an international nonprofit association of professionals who specialize in roofing, waterproofing, and exterior wall specification and design.  From sprayed polyurethane foam to cedar shakes, from parking garages to air barriers, RCI has a member expert for every type of roof, exterior wall, or waterproofing issue in the world today.   

RCI Technical Articles Library - Your library to all "Interface" articles.

NRCA - National Roofing Contractors Association

MRCA - Midwest Roofing Contractors Association

SPRI - An association representing Single-Ply Roofing Industry

AIA - American Institute of Architects

ASCE - American Society of Civil Engineers

ASTM - American Society for Testing & Materials

CRSMCA - Carolinas Roofing and Sheet Metal Contractors Assoc.

FMRC - Factory Mutual Engineering & Research

PIMA - Polyisocyanurate Insulation Manufacturers Assocation

ARMA - Asphalt Roofing Manufacturers Association