Google
“We had water entering a garage stairwell after every thaw. CWC documented the leak path, separated the membrane repair from the concrete work, and gave us a board-ready scope without drama.”
Commercial + Multi-Unit Waterproofing Across Toronto & the GTA
Commercial Waterproofing in Toronto for Foundations, Garages & 24/7 Leaks
When water starts entering a managed building — through the foundation wall, a garage deck, a cracked pit, or a failed sealant joint — the question is not just how to stop it, but how to explain the fix to a board, coordinate around tenants, and make sure it does not come back. That is exactly the kind of work we do.
- Transparent pricing table
- 24/7 leak response
- Board-ready scope notes
- Clean-site guarantee
Request a Free Waterproofing Quote
We respond within one business hour. Emergency leaks are dispatched 24/7.
Licensed
Licensed Waterproofing Crews
WSIB
WSIB Covered Crews
1-Hour
Leak Response Time
24/7
Emergency Service
Commercial Waterproofing That Starts with a Real Diagnosis
If your building has a recurring leak, the first thing that matters is where water is actually entering — not just where it shows up on the ceiling or floor. We trace the path, then explain whether the right repair is exterior foundation membrane, interior drainage, parking garage coating, crack injection, sump work, or 24/7 emergency response.
Most of our clients are managing or overseeing commercial and multi-unit buildings: condo boards, property managers, facility managers, GCs, plazas, offices, and mixed-use sites. That changes how waterproofing needs to be planned — around tenants, parking access, board approvals, insurance certificates, and timelines that are not always flexible.
We try to make that part straightforward: published pricing ranges so there are no surprises, written warranty language on eligible scopes, clear phasing plans, and someone available around the clock when a leak is actively getting worse.
Commercial Waterproofing Services
Water problems in managed buildings tend to fall into a few familiar patterns. The services below are organized around those patterns: foundations, basements, garages, drainage, leak repair, and envelope water entry.
Foundation Waterproofing
When water is entering through the foundation wall and the outside face is accessible, exterior membrane work is usually the most complete long-term repair. We also handle blindside systems for zero-lot-line builds and below-grade repairs where access is limited.
Interior Basement & Drainage
When excavation is blocked or the leak is mainly entering at the floor-wall joint, interior drainage is often the practical choice. We install drainage channels, weeping tile, sump basins, battery backup, and proper discharge paths for occupied GTA buildings.
Garage, Podium & Envelope
Parking garage decks, podium roofs, balconies, and terrace surfaces all face water, salt, and freeze-thaw cycles that break down concrete over time. We install and restore traffic coatings, podium membranes, and envelope sealants to protect the structure and the spaces below.
Leak Repair & Emergency
When a crack is actively leaking, a pit is flooding, or you need someone on-site within hours, this is the right starting point. We handle crack injection, elevator pit waterproofing, concrete restoration, and 24/7 emergency dispatch with a clear plan for the permanent repair.
All Waterproofing Services
Foundation Waterproofing
Exterior Foundation Waterproofing
Excavation, membrane, drainage board, and weeping tile work for leaking foundations where the long-term fix needs to happen from the outside.
Blindside Below-Grade Waterproofing
Pre-applied and blindside waterproofing systems for zero-lot-line foundations, shoring walls, and below-grade commercial construction.
Interior Basement Systems
Leak & Concrete Repair
Elevator Pit Waterproofing
Leak investigation, injection, coatings, and pit waterproofing coordinated around elevator service, safety requirements, and building operations.
Foundation Crack Injection
Polyurethane and epoxy crack injection for active foundation leaks, structural cracks, and localized below-grade water entry.
Concrete Restoration & Structural Repair
Crack repair, spall repair, delamination removal, corrosion mitigation, and substrate restoration before waterproofing systems are installed.
Drainage & Sump Systems
24/7 Emergency Leaks
Building Envelope
Balcony & Terrace Waterproofing
Waterproofing membranes, coatings, drain detailing, and concrete repair for balconies, terraces, and occupied podium spaces.
Building Envelope Caulking & Sealants
Sealant replacement, joint preparation, leak investigation, and envelope maintenance for commercial and multi-unit buildings.
Waterproofing by Property Type
A recurring basement leak in a condo building, a leaking garage deck in a plaza, and an active pit flood in a commercial property all need a different approach. Here is how we handle each type.
Condo Boards & Multi-Unit
When a condo board needs to approve a waterproofing repair, the documentation matters as much as the work itself. We provide photos, options, written cost ranges, phasing notes, and warranty language that help boards explain the decision to owners clearly.
Property Managers
If you are managing multiple properties across the GTA, you need a waterproofing contractor who can move quickly, work around tenants, carry proper insurance, and keep paperwork organized. That is the kind of support we are built to provide.
General Contractors
Below-grade waterproofing on a new build has to be right before the work is buried. We coordinate with site teams on drawings, inspection timing, and construction sequencing so the system performs once it is covered and inaccessible.
Facility Managers
When water reaches a mechanical room, elevator pit, or loading corridor, the building cannot wait days for a repair. We prioritize critical areas, separate emergency control from the permanent fix, and document conditions so you have a clear record for insurers and facility records.
How It Works
What to Expect from a Commercial Waterproofing Project
Every job follows the same four steps — from diagnosing where water is entering to leaving you with the documentation your property team can actually use.
01
Diagnose
We trace where water is entering before recommending a system. That means looking at the foundation wall, slab joints, garage membrane, drains, sump, grading, and any access limits. Photos and notes from this visit are shared so your property team knows exactly what is failing — not just where the stain is.
Before & After
From Active Leak to Protected Foundation
Drag the slider to see what changes when a leaking below-grade wall gets a proper repair. The difference is not just cosmetic — the right system controls water at the source, protects the concrete, and gives your building a warranty that means something when the next heavy rain arrives.
View waterproofing project types →
Toronto foundation leak - water entry to waterproofed wall
Drag the slider to compare
Commercial Waterproofing Costs in Toronto
One of the first things property managers and boards want to know is what the work will cost. These ranges give you a starting point for budgeting before the site visit, with notes on what moves the number up or down.
| Service | Typical Range | Notes |
|---|---|---|
| Interior basement waterproofing | $70-$150/lin ft | Interior drainage, wall membrane, sump tie-in, and slab restoration |
| Exterior foundation waterproofing | $150-$350/lin ft | Excavation, wall repair, membrane, drainage board, and backfill |
| Foundation crack injection | From $650 | Polyurethane or epoxy injection; access and crack activity affect the final price |
| Parking garage membrane / traffic coating | $12-$35/sq ft | Surface prep, crack repair, coating system, cure time, and phasing affect cost |
| Emergency leak response call-out | $350-$900 | Quoted before dispatch; active leaks and critical areas are prioritized 24/7 |
| Weeping tile / interior drainage | $80-$160/lin ft | Drainage channel or weeping tile tied to a sump or approved discharge route |
| Sump pump install | $1,800-$4,500 | Basin, pump, check valve, discharge route, alarm, and backup options |
| Elevator pit waterproofing | $4,000-$15,000 | Leak injection, coatings, concrete repair, and elevator contractor coordination |
What changes the price: excavation depth, utilities, hardscape removal, membrane type, surface preparation, concrete repair, drains, sump capacity, elevator or garage shutdowns, after-hours work, and restoration.
Why published ranges matter: two waterproofing quotes can look similar while describing very different scopes. We itemize membrane, drainage, repair, access, and restoration so boards and owners can see what is included — and what is not — before approving anything.
These ranges reflect typical GTA waterproofing work. Call 1 (888) 702-2022 for emergency leak pricing before dispatch.
Warranty, Documentation & Building Protection
The materials and the installation both matter — but so does what you are left with afterward. Scope notes, warranty terms, and a clean site are part of how we do the work, not extras.
Transferable 25-Year Language
Eligible waterproofing scopes include written warranty terms where assembly, drainage, and access conditions allow it.
Clean-Site Guarantee
Crews protect access routes, contain debris, manage soil and dust, and leave work areas broom-clean at the end of each day.
Board-Ready Scope Notes
Photos, options, phasing notes, and plain-English recommendations help condos explain reserve work and special assessments.
Critical Area Response
Active leaks near elevators, electrical rooms, mechanical spaces, storage, and tenant areas are prioritized for 24/7 triage.
Waterproofing scopes are aligned with building conditions, manufacturer requirements, Ontario construction expectations, and the practical needs of occupied commercial and multi-unit sites.
Choosing the Right Waterproofing System
Not every leak requires excavation, and not every coating addresses a drainage problem. This table helps property teams understand which system fits the situation before the site review.
| System | Best For | Key Strength | Note |
|---|---|---|---|
| Exterior foundation membrane | Accessible foundation walls, chronic basement leaks, long-term repairs | Stops water at the outside face and relieves pressure with drainage board | Best when excavation is practical and the wall condition needs a full reset |
| Interior drainage / weeping tile | Finished basements, blocked exterior access, floor-wall seepage | Collects water behind membrane or below slab and moves it to a sump | Often the practical option for occupied Toronto and GTA buildings |
| Parking garage traffic coating | Condo garages, podium decks, ramps, drive aisles, pedestrian decks | Protects concrete from water, chlorides, and freeze-thaw damage | Surface preparation and phasing decide whether the coating lasts |
| Crack injection (epoxy/polyurethane) | Localized active cracks, structural cracks, elevator pits, joints | Polyurethane controls water; epoxy bonds structural cracks | Fastest focused repair when the leak path is accessible and isolated |
| Blindside / below-grade | Zero-lot-line builds, shoring walls, additions, property-line foundations | Waterproofing is installed before concrete where future access is impossible | Requires careful detailing before the work is buried permanently |
| Cementitious / crystalline waterproofing | Elevator pits, concrete tanks, interior negative-side surfaces | Bonds to concrete and resists seepage where membrane access is limited | Useful for pits and concrete repairs when paired with proper joint treatment |
24/7 Emergency Leak Response
Water Entering Now? Here Is What to Do.
Active water entry in a managed building moves quickly — into finishes, stored goods, mechanical rooms, elevator pits, and tenant spaces. Our emergency line dispatches a crew for temporary control, leak-path diagnosis, documentation, and a permanent repair plan. We serve Toronto and the GTA around the clock.
- ✓ Typical 1-2 hour GTA target arrival, depending on weather and access
- ✓ Temporary diversion, containment, or injection where same-visit repair is realistic
- ✓ Photos and notes for owners, boards, insurers, or facility records
- ✓ Follow-up scope for foundation, drainage, garage, pit, or envelope repair
What Happens When You Call
- 1. Triage - We confirm the active leak, risk area, site access, and whether electrical, elevator, or mechanical systems are involved.
- 2. Dispatch - A crew is sent with emergency leak-control materials matched to the likely condition.
- 3. Control - We contain, divert, inject, or stabilize what can be handled during the emergency visit.
- 4. Repair Plan - You receive next steps for the permanent waterproofing scope once the immediate risk is controlled.
Recent Waterproofing Work Across the GTA
Foundation membranes, parking garage coatings, elevator pit repairs, interior drainage, and crack injection for commercial and multi-unit buildings across Toronto and the surrounding area.
GarageToronto
Condo Parking Garage Membrane Renewal
A downtown condo garage had slab leaks, salt staining, and owner concern about assessment costs. The scope included crack routing, localized concrete repair, traffic coating replacement, drain detailing, and phased parking closures so the board had a practical plan.
FoundationMississauga
Exterior Foundation Excavation & Membrane
A commercial lower level beside a paved service lane leaked after heavy rain. Crews excavated to footing, repaired wall defects, installed membrane and drainage board, reviewed weeping tile, and restored the access lane with clean staging.
RepairVaughan
Elevator Pit Leak Repair
Water was collecting in a commercial elevator pit after storms. The repair was coordinated with the elevator contractor and included active leak injection, joint treatment, cementitious waterproofing, and photo notes for the property file.
Client Reviews
What Building Teams Say About the Work
Notes from GTA waterproofing jobs — garage coatings, foundation membranes, drainage fixes, crack injection, and emergency water control.
5.0
Rated by GTA property teams
Google
“We had water entering a garage stairwell after every thaw. CWC documented the leak path, separated the membrane repair from the concrete work, and gave us a board-ready scope without drama.”
Have a project coming up? Call 1 (888) 702-2022 or send photos for a free leak assessment.
Why Property Teams Choose CWC
Commercial + Multi-Unit Focus
CWC is built for condo boards, PMs, GCs, and facility managers who need scopes that survive owner questions, tenant disruption, and capital planning.
Transparent Pricing
Published ranges and itemized quotes make it easier to compare exterior membrane, interior drainage, crack injection, sump, garage, and pit waterproofing scopes.
Condo Assessment Support
Garage, balcony, and foundation projects often need board approval. We provide photos, priority notes, phasing options, and plain-English explanations.
Transferable Warranty Language
Eligible scopes include written warranty terms tied to the actual assembly, drainage path, and completed recommendations.
Clean-Site Execution
Waterproofing can be muddy, dusty, and disruptive. Our crews protect access routes, control debris, and clean daily so occupied properties keep operating.
24/7 Leak Response
When water is entering now, we dispatch for emergency control, documentation, and a permanent repair path instead of leaving the building to improvise.
Credentials You Can Verify
- • Commercial general liability insurance
- • WSIB coverage on every crew member
- • Waterproofing and concrete repair crews
- • Working-at-heights planning for elevated access
- • Written warranty terms on eligible scopes
- • Certificates of insurance available on request
Service Areas
Serving Commercial Properties Across the GTA
Foundation waterproofing, garage membranes, crack injection, drainage, and emergency leak response across Toronto, Vaughan, Mississauga, Markham, Brampton, Oakville, Durham, and nearby areas.
Toronto & the Greater Toronto Area
Coverage from Burlington to Oshawa along Lake Ontario, and north through York Region — click a city on the map or pick from the list. No travel charges inside our standard GTA coverage area.
BurlingtonOakvilleMiltonMississaugaBramptonTorontoVaughanRichmond HillMarkhamAuroraNewmarketPickeringAjaxWhitbyOshawa
View all service areas →Start Your Toronto Waterproofing Scope Today
Tell us what is leaking, where it shows up, and who needs the scope. We will help you choose the right system, document the options, and quote the work clearly.
CWC Commercial Waterproofing — Frequently Asked Questions
How much does basement waterproofing cost in Toronto?+
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.
Interior vs exterior waterproofing — which do I need?+
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.
Is the waterproofing warranty transferable?+
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.
Will waterproofing crews leave a mess?+
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.
How should a condo board handle parking garage leaks before a special assessment?+
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.
How fast can you come for an emergency leak?+
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.
Is basement waterproofing worth it?+
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.
How do I avoid a waterproofing scam?+
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.
Do you only do commercial waterproofing?+
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.
What makes CWC different from a typical waterproofing contractor?+
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.
How do I contact CWC Commercial Waterproofing?+
Call 1 (888) 702-2022 or email info@commercialwaterproofing.ca. Our office is at 9000 Keele St, Unit 5D, Vaughan, ON L4K 0B3.
Looking for more detail? See all FAQs.
Ready for a CWC Commercial Waterproofing Quote?
Free, no-pressure estimates across Toronto and the GTA. Emergency leak crews are available 24/7.