A Trusted Foundation and Waterproofing expert since 2000 Tri-State Waterproofing is a family-owned business with 25 years of experience protecting homes and businesses across Georgia, South Carolina, and North Carolina. A BBB Accredited Business with an A+ rating and a HomeAdvisor-screened and approved company, specializing in keeping property safe and dry with professional basement waterproofing, foundation repair, crawl space repair, concrete correction, commercial, and new construction waterproofing services.