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Interlock Industries, Inc. is a proud member of the Western States Roofing Contractors Association (WSRCA).
 The Western States Roofing Contractors Association (WSRCA) is a trade association serving the roofing industry of the Western United States. Founded in 1974, WSRCA also hosts the annual Western Roofing Expo. The WSRCA supports the roofing industry and its members by providing access to trade publications, legal and technical advice and other services. The WSRCA is based in Mountain View, California. Many of the roofing industry's largest manufacturers and suppliers are currently members.
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