http://www.rci-online.org   -   Roof Consultants Institute

http://www.exterior-design-inst.com   -   Exterior Design Institute

http://www.asce.org   -   American Society of Civil Engineers

http://www.nspe.org   -   National Society of Professional Engineers

http://www.aiaonline.com   -   American Institute of Architects

http://www.sbcci.org   -   Standard Building Code

http://www.nfpa.org   -   National Fire Protection Association

http://www.factorymutual.com   -   Commercial and Industrial Insurance

http://www.ul.com   -   Underwriter Laboratories