The Canadian Asphalt Shingle Manufacturers’ Association (CASMA) was established in 1989 with a mandate to serve and promote the best interests of all stakeholders in the residential roofing industry.

As well as being an advocate for the industry it represents,  CASMA, through its website, has the mission to provide public and free information about its products for the benefit of the end-user.

Why Choose Asphalt Shingles?


CANADIAN ASPHALT SHINGLE MANUFACTURERS' ASSOCIATION (CASMA) is a corporation which was created on July 24, 1989 pursuant to the Canadian Corporation Act and continued under section 211 of the Canadian "not-for-profit" Corporation Act on October 12, 2012.

The mission of CASMA is to serve and promote in every legitimate way the interests of the Canadian manufacturers of asphalt shingles.

Over more than a quarter century, CASMA and its member manufacturers have played a vital role in the roofing industry’s evolution and success.  They have witnessed dramatic changes in the competitive landscape, in the way shingles are sold, in manufacturing technologies and in the evolution of shingle design.

Together, CASMA and its member manufacturers have overcome many challenges on behalf of homeowners, suppliers, distributors and employees.

Members of CASMA

Associate Members