Canadian Standardization Association (CSA Group)
www.csagroup.org
Canadian Roofing Contractors Association (CRCA)
www.roofingcanada.com
Canadian Roofing Contractors Association (CRCA) Technical Bulletins
www.roofingcanada.com/technical.html
National Roofing Contractors Association (NRCA) (U.S.)
www.nrca.net
NRCA Wind Design Guide
www.roofwinddesigner.com
IIBEC (International Institute of Building Enclosure Consultants)
www.southernontario.iibec.org
