If you have a crack in your foundation, need foundation walls waterproofed, or have any other foundation repair needs, you've come to the right place. The Foundation Guys have been serving Ontario since 1978, specializing in basement systems and crawl spaces. The Foundation Guys are owned and operated by the father and son team of Dana and Jerry Sirois, both of whom have decades of experience in the foundation and masonry industries. The foundation is the most important part of your home, and when you call us you can trust that you're getting expert professional services.