New York City District Council of Carpenters - Provides information on local unions, benefits, organizing, political agenda, and general news. - http://www.nycdistrictcouncil.com/
The Roofers Union - United Union of Roofers, Waterproofers and Allied Workers Union. Founded in 1903 and based in Washington, D.C., the union has 22,000 members participating in 10 regional district councils across the US. - http://www.unionroofers.com/