ACM solves Long Island’s basement waterproofing problems the right way, the first time! For our years of reliable service to homeowners and businesses in Long Island, we have been recognized and awarded. From Angi to BBB to HomeAdvisor to multiple Best of Long Island awards, over and over, the quality of our work and our focus on top-notch customer service is the reason why we are Long Island’s top choice for basement waterproofing, foundation repair, and crawl space waterproofing.