Interior basement waterproofing in Southern Ontario: perimeter drain, weeping tile, and sump. When you cannot excavate, this is the system that works. (905) 929-0441.
Interior waterproofing is a perimeter channel in the slab, new weeping tile, and a sump that actually discharges away from the house. It is the right call on tight lots, finished landscaping, or when exterior excavation would wreck more than it saves.
It is not magic paint. If the wall is structurally failing, we say so and talk stabilization first. If you can excavate, we will tell you when exterior is the better 40-year answer.