Because your home is your largest investment, you're not going to hire just any company to tend to your foundation issues. For a tried-and-true professional, hire Key Waterproofing Construction in Holbrook, MA. We are a waterproofing contractor who has handled countless residential foundation jobs. Established in 2014, our waterproofing company provides effective and affordable solutions you can trust. We offer a full suite of services including waterproofing foundation, waterproofing basement, concrete floor coating and sump pump installation.