Dave Gray of GCC of America and recent NRMCA Promoter of the Year has released this new promotional video that documents the construction of a 26,000 square foot 3-inch concrete overlay over an existing asphalt parking lot in Thornton, CO. The parking lot was constructed by Leonard Velasquez of SLV Quality Concrete. Gray worked with NRMCA Vice President, Local Paving, Don Clem, PE., Velasquez, and the City of Thornton on the design of the concrete overlay. Includes some great tips for contractors.