Commercial waterproofing for parking garages, decks and foundations

It depends on the slab, the traffic and how long each zone can close. Thin polyurethane traffic coatings, 1.5 to 3 mm thick, bond to the concrete and add little weight. Hot rubberized asphalt under an asphalt or concrete topping is thicker and heavier, but the topping shields it from wear and snowplows. Fast-curing methacrylates go down in hours at ramps and turns. For new garages, CSA S413 sets requirements for these systems. Our engineers check load and clearance before recommending one.

Usually, yes. We work in zones: one area is closed, prepared, coated and cured while cars use the rest, with traffic rerouted and notices posted before each move. In Toronto, clearly audible construction noise is allowed 7 a.m. to 7 p.m. on weekdays and 9 a.m. to 7 p.m. on Saturdays, but not on Sundays or statutory holidays without an exemption permit. We plan the zones, notices and noisy work with property management before we start.

Ontario condominiums must update their reserve fund study at least every three years, and each study plans major repair and replacement over at least 30 years. Garage and deck membranes, joints and slab repairs are usually part of that plan, and the Condominium Authority of Ontario flags suspended slabs that support parking, driveways or landscaping as a risk to plan for. We price the work in phases, so your board can match it to the study’s funding plan.

Often, yes. Cracks and joints that are leaking get polyurethane injection, and dry, dormant cracks that need a structural bond get epoxy. Walls and pit floors can then be coated with crystalline waterproofing. In an elevator pit, the elevator contractor shuts the car down and removes covers first. An outside membrane still works best because it keeps water out of the concrete, so we use one wherever we can, including blindside membranes fixed to the shoring before a lot-line wall is poured.

It depends on the scope. Ontario’s Building Code Act counts material alteration or repair as construction, which needs a permit. Toronto lists basement waterproofing repairs and re-roofing without structural work as jobs that don’t, while structural or material alterations and new green roofs do. A like-for-like membrane may not need one; structural concrete repairs usually do. Your municipality makes the final call. When a permit is needed, our engineers prepare the drawings and application.