Frequently Asked Questions

Interior basement waterproofing usually runs $70-$150 per linear foot. Exterior foundation waterproofing usually runs $150-$350 per linear foot. Crack injection starts at $650, sump pump installs often run $1,800-$4,500, and elevator pit waterproofing commonly runs $4,000-$15,000. Access, depth, occupied areas, drainage, phasing, and restoration all affect the final number.

Two quotes can describe very different scopes. One may include excavation, membrane, drainage board, weeping tile, gravel, traffic control, and restoration; another may only include a surface coating. We itemize the quote so boards and owners can see what is included and what is not.

Scheduled quote responses are free, and we respond within one business hour during regular hours. Emergency leak call-outs are different because a crew is dispatched right away; those usually run $350-$900 and are quoted before dispatch.

Not always, but it deserves scrutiny. A lower quote may be fine if access is simple and the scope is smaller. It becomes risky when it leaves out drainage, surface preparation, concrete repair, phasing, restoration, or warranty terms. Compare scopes, not just totals.

Exterior waterproofing is usually the most complete fix when the foundation wall is accessible because it stops water before it enters. Interior waterproofing is often the practical choice when excavation is blocked by a neighbouring wall, sidewalk, utilities, landscaping, or when water is mainly entering at the floor-wall joint.

A properly designed interior drainage system is a real fix for many seepage problems. It controls water by collecting it behind a membrane or at the floor-wall joint and moving it to a sump. It is not the same as repairing the outside face of the wall, so the leak source matters.

Exterior work is worth it when the wall is accessible, the leak source is outside, and the building needs a long-term repair at the source. It is especially sensible when old coatings, cracks, and failed drainage are all present along the same wall.

Yes, when both options are realistic. We explain cost, disruption, restoration, warranty language, and expected performance for each so owners are not forced into a single recommendation without context.

It starts with diagnosis: where water enters, where it travels, and what access is realistic. From there, we compare exterior membrane, interior drainage, crack injection, garage coating, pit repair, drainage, or sealant work, then provide a written scope with cost drivers, phasing, and documentation.

Eligible waterproofing scopes include written transferable 25-year warranty language. The exact warranty depends on the assembly, drainage path, access conditions, and whether the recommended scope was completed. We put the terms in writing before work starts.

They should not. Waterproofing can be dusty, muddy, and disruptive, but that is not an excuse for sloppy work. Our clean-site guarantee covers protected access routes, contained debris, daily cleanup, and a broom-clean work area at the end of the job.

It is worth it when water entry is recurring, damaging finishes, creating odour or mold risk, affecting tenants, or threatening mechanical, storage, amenity, or commercial lower-level space. It is not worth overbuying a major excavation when a localized injection or drainage repair will solve the real issue. The diagnosis matters.

Be cautious with pressure tactics, one-day-only discounts, vague lifetime warranties, and quotes that do not explain drainage or access. Ask for photos, scope details, product type, warranty terms, insurance, and what happens if hidden conditions are found.

Start with documentation: leak locations, photos, coating condition, concrete damage, drain and expansion joint conditions, repair options, phasing, and budget range. We provide plain scope notes so boards can separate emergency repairs from reserve-fund or special-assessment work.

Parking garage membrane and traffic coating work commonly runs $12-$35 per square foot. Concrete repair, crack routing, expansion joints, ramps, line painting, traffic control, and cure time all affect the final project cost.

Usually, yes. Garage programs are commonly phased by level, bay, drive aisle, or traffic zone. The phasing plan needs to account for fire routes, cure times, line painting, resident notices, and accessible parking.

Yes. We provide written scopes, photos, warranty language, insurance documentation, phased schedules, and plain-English notes that can be shared with boards, owners, engineers, and insurers.

Yes. We can document visible leak paths, membrane condition, concrete damage, drain and joint concerns, repair options, cost ranges, and phasing notes so management has practical information before the meeting.

Emergency leak response is available 24/7. Across much of Toronto and the GTA, the target arrival is 1-2 hours depending on weather, traffic, call volume, and site access.

Emergency leak response call-outs usually run $350-$900. We quote the call-out before dispatch. The visit focuses on control, safety, documentation, and whether a same-visit repair is realistic.

Sometimes. Active foundation cracks can often be injected quickly if accessible. Larger exterior foundation leaks, garage membrane failures, drainage problems, and elevator pit issues usually need a follow-up scope after the immediate water entry is controlled.

Keep people away from water near electrical or mechanical equipment, move stored goods if safe, document visible damage, and do not open walls or dig unless instructed. If water is near life-safety systems, building operations and emergency services may need to be involved.

We work across Toronto and the GTA, including Mississauga, Brampton, Vaughan, Markham, Richmond Hill, Oakville, Burlington, Etobicoke, Scarborough, North York, Pickering, Ajax, Whitby, Oshawa, Newmarket, Aurora, Milton, Caledon, and Halton Hills.

Yes. Commercial and multi-unit work is our core focus: condo corporations, property managers, GCs, facility managers, plazas, offices, schools, industrial sites, and institutional buildings. We still serve managed multi-unit basement waterproofing and foundation waterproofing searches when the building and scope fit that commercial focus.

Transparent published pricing, transferable 25-year warranty language on eligible scopes, a clean-site guarantee, condo-board and property-management documentation, and 24/7 leak response. The goal is to make the scope understandable before work starts.

Call 1 (888) 702-2022 or email info@commercialwaterproofing.ca. Our office is at 9000 Keele St, Unit 5D, Vaughan, ON L4K 0B3.