CSSBI Announces Spring 2013 Television Advertising Campaign to Promote Residential Steel Roofs Cambridge, ON April 19, 2013 – Member companies of the Canadian Sheet Steel Building Institute (CSSBI) are jointly funding a 4-week national television advertising campaign to promote residential steel roofing products across Canada. The campaign, which will air exclusively on HGTV (Home & Garden Television), begins Monday, April 22ndand runs for four consecutive weeks, ending Sunday, May 19th.