Welcome to


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.

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.

CASMA's           Mission

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.

» Read CASMA's Objectives

About CASMA's Website

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.

» Consult our Technical Bulletins

» View our Additional Resources

About Asphalt Shingles

Asphalt shingles have been the first line of defence for the Canadian homeowners for over 100 years.

The product has a proven track record of excellence and affordability combined with high aesthetic qualities and suitability for all Canadian climates: from Victoria to St John's and from Southern Ontario to the Yukon.

» The History of Asphalt Shingles

» The Merits of Asphalt Shingles

» View our Roof Photo Gallery 

© Copyright 1989 - Canadian Asphalt Shingle Manufacturers' Association. All Rights Reserved.