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BOCA Evaluation Services Inc. www.bocai.org Canadian Construction Materials Centre (CCMC)-National Research Council (NRC) www.nrc.ca/ccmc The Vinyl Council of Canada www.plastics.ca/vinyl Canadian Portland Cement Association (CPCA) www.cpca.ca Canadian Standards Association (CSA) www.csa-international.org Habitat for Humanity International www.habitat.org ICBO Evaluation Service (ICBO ES) www.icbo.org The Pennsylvania Housing Research Center www.psu.edu The Vinyl Institute www.vinylbydesign.com Canadian Commercial Corporation www.ccc.ca Portland Cement Association www.portcement.org Cement Association of Canada www.cement.ca Industry Canada www.ic.gc.ca