Diamond Masonry & Basement Waterproofing, founded in 2006, is a locally owned and operated business based in Merrick, New York, serving the surrounding areas. With over 17 years of experience, they specialize in basement waterproofing, concrete services, and pressure relief systems. Their skilled craftsmen are known for their punctuality, professionalism, and commitment to customer satisfaction. They are fully licensed and insured in both Nassau and Suffolk County. Whether you need help with leaks, floods, or stonework, Diamond Masonry is the reliable company to call.