Stone Roofing Association Information on the geological history and use of sandstone and limestone roofing in the UK. Of interest to architects, conservation professionals, and roofers.
United Union of Roofers, Waterproofers and Allied Workers The United Union of Roofers, Waterproofers and Allied Workers, based in Washington, D.C., has 22,000 members participating in 11 regional district councils across the country.
