Looking for basement repair in Chatham, ON or nearby? Advanced Basement Systems provides basement waterproofing , crawl space repair, radon mitigation, foundation repair, and attic insulation to homeowners in Southwestern Ontario. We have served Ontario since 2003 and offer custom solutions, designed to repair and upgrade your basement, crawl space, foundation, or other below-grade space, creating a dry, healthy home. You can expect the highest quality work and customer service. Our expertly trained and courteous technicians only install permanent, warrantied basement repair and foundation solutions. You can also count on us to reduce hazardous radon levels and improve home comfort and energy efficiency with attic insulation upgrades. We serve homeowners and businesses in Windsor , London , Sarnia , and the surrounding area.