http://www.arcaonline.ca
The Alberta Roofing Contractors Association (ARCA) is an industry association

http://www.roofingcanada.com/html/index.html
CRCA is the national voice of the Roofing Industry in Canada.

http://www.aaa.ab.ca/
The Alberta Association of Architects

http://www.arcat.com/
Building Product Information for the Architectural and Spec Writing Communities

http://www.csc-dcc.ca/
Construction Specifications Canada

http://www.pwgsc.gc.ca/cgsb/catalogue/serie/037_serie-e.html
Canadian Roofing and Waterproofing Materials Specifications