Hummingbird Basement Waterproofing is a locally owned family business serving Brampton, Mississauga, Oakville and GTA area. After 30 years of basement waterproofing experience, we are proud of our reputation for doing the job right the first time. We stand behind every project with our 25-year guarantee. Of course, estimates are always free. Every customer is important to us. We do not sub-contract out work.