Real Mississauga basements. Real leaks. Permanent fixes, backed by a 25-year warranty.
We’re not a call centre in another city. DrainCom is a licensed and insured waterproofing company in Mississauga, and our shop is right here on Kamato Road. When you call, you talk to the same local crew that shows up at your door.
For over 20 years, we’ve handled the basement waterproofing Mississauga homes need most: leaky foundation walls, failed weeping tile, high water tables and flooded floors. Every job starts with a free inspection. We use infrared moisture detection and drain cameras to find the real source before we quote a dollar.
Water gets into Mississauga basements in a dozen different ways. Clay soil, tired weeping tile, a cracked wall, a window well that won’t drain. From Port Credit to Meadowvale, Mississauga basement waterproofing is what we do every day, and we match the fix to the source, not just the symptom. Here are the basement waterproofing services Mississauga homeowners call us for most.
BASEMENT WATERPROOFING MISSISSAUGA: FULL SERVICE RANGE
Stop water from entering your basement using interior drainage systems and sump pump connections.
Full foundation protection from the outside with excavation, sealing, and drainage systems.
Emergency response and permanent solutions for active leaks, flooding, and water damage.
A leaking basement wall rarely fixes itself, it gets worse every freeze-thaw season. We locate the exact entry point, inject polyurethane or epoxy to seal it permanently, and stop the water damage before it reaches your structure.
Seal foundation cracks and prevent future water intrusion with permanent solutions.
Restore or install proper drainage around your foundation to redirect groundwater safely away.
We assess your flood risk, install the right combination of sump pump, backwater valve, and drainage systems, then help you qualify for up to $10,500 in Peel Region rebates. Already flooded? We clean up and fix the source.
When Mississauga’s seasonal water table rises after snowmelt or heavy rain, standard exterior waterproofing isn’t enough. We install interior drainage systems under your concrete slab, with weeping tile and Delta MS membrane, to intercept groundwater before it surfaces.
A backwater valve snaps shut when Mississauga’s combined sewers surge during storms, blocking raw sewage from flooding your floor drain. City rebates of up to $750 are available. We handle the installation, inspection, and rebate paperwork.
A window well that isn’t draining properly is a direct path for water into your basement. We excavate, reconnect the drain to your foundation’s weeping tile system, and backfill with clear gravel, so water drains down and away, not through your window frame.
Our full floor package covers demolition, weeping tile installation, Delta MS waterproofing membrane, optional sump pump and backwater valve, new rough-ins, and a clean poured slab. One contractor for everything, saving you up to 60% versus hiring separate trades.
We’ve repaired or waterproofed more than 20,000 GTA homes over the past 20 years. That’s over 300,000 linear feet of basement wall sealed and more than 700,000 feet of membrane and weeping tile pipe installed. Add a 25-year transferable warranty, and you can see why so many Mississauga families call us first.
Every basement waterproofing job starts the same way: a thorough inspection to find where water is actually getting in. And it’s free. Here are the 12 entry points we check in every home.
Spot water at any of these points? Let's find the source before it spreads.
Book My Free InspectionWe’ll inspect your basement and recommend the right waterproofing fix. No guesswork, no pressure.
Water damage rarely happens overnight. It builds slowly, season after season. If you notice any of these signs, your Mississauga home may already be taking on water.
That chalky white residue is efflorescence, free lime leaching out as moisture pushes through your concrete. It’s your foundation telling you water is already getting in. Ignore it and the concrete weakens over time.
A musty odour is mould and fungus spores in the air. You may not see water, but damp conditions are already breeding health hazards, especially risky for anyone with asthma or allergies. Don’t mask it. Fix it.
Hairline cracks in poured concrete or block walls are not cosmetic. Ontario’s freeze-thaw cycles force water into those cracks each winter, and every freeze makes them wider. A small crack repair now costs a fraction of what a flooded basement does later.
Dark patches or tide marks on basement walls and floors after heavy rain or spring thaw are signs of active water seepage. Hydrostatic pressure from saturated soil is pushing moisture through the wall-to-floor joint, one of the most common entry points we see across Mississauga.
Your sump pump running non-stop, especially when it hasn’t rained recently, signals a high water table beneath your home. That’s the groundwater from Mississauga’s Credit River and Cooksville Creek drainage patterns pushing up under your slab.
Mould can begin growing in a damp basement within 24 to 48 hours. Once it spreads into drywall, insulation, and floor joists, you’re looking at a remediation project, not just a waterproofing job. Catching it early is everything.
Quick answer: most residential basement waterproofing in Mississauga runs $100 to $400 per linear foot. That's a wide range, and here's why. Interior and exterior waterproofing are completely different jobs, with different steps and different prices.
Soil matters too. Much of Mississauga sits on dense clay, while other pockets have sandy fill with buried rock that makes digging with a backhoe slow and hard. Depth, access and the condition of your wall all play a part.
| Type of job | Avg. min | Avg. max |
|---|---|---|
| Interior waterproofing | $100per linear foot | $300per linear foot |
| Exterior waterproofing | $150per linear foot | $400per linear foot |
| Foundation crack repair | $1,800per crack, up to 4 ft wide and 5 ft deep | $3,200per crack, up to 5 ft wide and 9 ft deep |
| Window well repair (regular) | $2,000up to 48" wide, 4 ft deep | $3,800up to 60" wide, 9 ft deep |
| Type of job | Min | Max |
|---|---|---|
| Sump pump and tank | $2,300 | $3,500 |
| Sump pump only | $900 | $1,500 |
| Sump pump battery backup | $1,480 | $1,700 |
| Backwater valve, inside | $2,200 | $3,200 |
| Backwater valve, outside | $2,400 | $3,700 |
* Approximate prices for information only. Your final cost depends on access to the dig area, excavation depth, foundation type, total length (longer runs often cost less per foot), soil conditions and the state of the wall. You get a written quote after a free inspection, and many homeowners qualify for City of Mississauga rebates of up to $7,500.
The same six steps on all our waterproofing services. No guesswork. No surprises. Just dependable service that comes to your door.
Most Mississauga homeowners don’t know the City will help pay for flood protection. Here’s what’s available right now, and how we make claiming it painless.
Up to $7,500 per home for eligible flood protection, including a sump pump, weeping tile capping and downspout disconnection.
Up to $6,000 toward an eligible sump pump installation. The City must pre-approve the work before we install.
60% of the invoiced cost, up to $1,500, for a backwater valve on your sanitary sewer line. A permit and inspection are required.
Up to $3,000 (50% of costs) for flood-resistant upgrades if your home flooded on or after July 8, 2013.
We hold a valid City of Mississauga business licence, and all work is done by licensed tradespeople, as the rebate programs require. We help with permits, inspection paperwork and the rebate forms for our work at no extra cost.
Call before any work starts and we’ll confirm which rebates fit your property. See full rebate details.
Confirm Your Rebate Eligibility →
Twenty-plus years of showing up, doing honest work and leaving homeowners happy. Not a one-time score. A track record you can check review by review.
Over 20,000 GTA homes waterproofed and more than 300,000 linear feet of foundation wall sealed. We've seen every kind of leak, and fixed it.
Our warranty stays with the house when you sell. The new owners are covered too. That's how much we trust every waterproofing system we install.
Excavation, membrane, weeping tile, sump pump and backwater valve, all under one roof. You deal with one basement waterproofing contractor Mississauga families recommend to their neighbours, not a string of separate trades.
Emergency response is available. Our trucks carry the tools and parts for most waterproofing jobs, so we can often fix the problem on the first visit.
Every job starts with a clear, itemized estimate. No hidden fees, no pressure. We treat your home the way we'd want ours treated.
Real Mississauga homes. Real problems. Permanent fixes, with warranties.
Problem: 3 active foundation cracks; water entry after every rainfall on a pre-1980 brick home.Service: Exterior waterproofing + weeping tile replacement + hydraulic cement crack injection.Outcome: Zero leaks since repair. 25-year warranty issued.
Problem: Sewer backup into basement during 2024 storm events; combined sewer system overwhelmed.Service: Interior waterproofing + sump pump + backwater valve installation.Outcome: Full flood protection installed. Homeowner claimed $3,400 Peel Region rebate.
Problem: Clay soil saturation causing water pooling along entire foundation perimeter after rain.Service: Foundation crack repair (polyurethane injection) + French drain system installation.Outcome: Drainage redirected. Foundation permanently sealed.
Problem: 80% blocked clay tile drain with severe tree root intrusion; complete drainage failure.Service: CCTV camera inspection + trenchless pipe replacement (60 ft).Outcome: Drain replaced in 2 days. No yard excavation. Post-camera confirmed fully clear.
Business Hour:
Monday to Friday: 8 a.m. to 9 p.m.
Saturday and Sunday: 9 a.m. to 2 p.m.
Real questions from Mississauga homeowners. Straight answers.
Basement waterproofing stops water from getting through your foundation walls and floor. Depending on the home, that can mean sealing the outside of the wall with a membrane, installing or replacing weeping tile, injecting cracks with polyurethane or epoxy, or adding an interior drainage system that carries water to a sump pump. The goal is simple: take the pressure off the wall and give the water somewhere else to go. Our free inspection tells you which approach your basement needs.
Interior waterproofing usually runs $100 to $300 per linear foot. Exterior waterproofing ranges from $150 to $400 per linear foot, depending on dig depth, soil and access. Foundation crack repair starts around $1,800 per crack, and a sump pump with a new tank runs $2,300 to $3,500. These are ballpark numbers. We give you a written quote after a free inspection, and many Mississauga homeowners qualify for City rebates of up to $7,500.
Exterior waterproofing stops water before it reaches your foundation wall. We dig down to the footing, clean and seal the wall with hydraulic cement and a waterproofing membrane, and install or replace the weeping tile. It's the most complete fix, but it needs excavation. Interior waterproofing manages water that has already come through the wall. We redirect it through a Delta MS membrane and perimeter weeping tile to a sump pump. It's less invasive and often more affordable. The right choice depends on your foundation, its depth and where the leak starts.
Choosing a basement waterproofer comes down to four things: a licence and insurance, a long local track record, a written warranty and real reviews. Ask who will actually do the work and whether the warranty transfers when you sell. DrainCom has been a waterproofing company in Mississauga for over 20 years, holds a 9.9/10 on HomeStars from 820+ reviews, and backs its work with a 25-year transferable warranty.
Call as soon as you see water, white powder on the walls, a crack that's growing or a musty smell that won't go away. Small leaks get bigger with every freeze and thaw. When you hire a basement waterproofing contractor, Mississauga rebate rules also matter: the City requires licensed trades and pre-approval before work starts, so bring us in early. We inspect for free, explain what we find and give you a written quote with no pressure to sign.
Yes. We're based in Mississauga, so we're never far away. Our crews work in every neighbourhood, including Port Credit, Streetsville, Meadowvale, Erin Mills, Churchill Meadows, Cooksville, Clarkson, Lorne Park, Malton and Mississauga Valleys. We also serve Toronto, Brampton, Oakville and the rest of the GTA, and emergency calls get priority.
Some flood protection work qualifies. The City of Mississauga Basement Flooding Prevention Rebate pays up to $7,500, including up to $6,000 for a sump pump. Peel Region covers 60% of a sanitary backwater valve, up to $1,500. Work must be pre-approved and done by a licensed contractor. Sump pumps tied into an interior waterproofing system aren't eligible under the City program, so call us before work starts and we'll tell you what applies to your home.
Yes. Most of our waterproofing work comes with a 25-year transferable warranty covering labour and materials. It moves to the new owner if you sell, which is a real selling point in Mississauga's busy housing market. We stand behind our work because we've spent over 20 years doing it right the first time.
Interior waterproofing usually takes one to two days. Exterior waterproofing takes three to five days, depending on how deep we dig. Crack injections take a few hours per crack. You'll see the timeline in your written quote, we show up when we say we will, and we clean up completely before we leave.
A sump pump that runs constantly, even in dry weather, usually points to a high water table or a weeping tile problem. Mississauga homes near the Credit River, Cooksville Creek and Etobicoke Creek see this a lot. We check the pit, the pump and the weeping tile, then recommend the fix, whether that's a bigger pump, a battery backup or an interior drainage system under the slab.
Yes. DrainCom is fully licensed and insured for basement waterproofing, foundation repair and plumbing work in Ontario, with WSIB coverage for our crews. All work meets the Ontario Building Code. We've served Mississauga and the GTA for over 20 years and hold a 9.9/10 rating on HomeStars from 820+ verified reviews.
Often you need both skills on the same job. Sump pumps, backwater valves and weeping tile connections tie into your plumbing and usually need a permit and a licensed plumber. Membranes, crack repair and excavation are waterproofing work. DrainCom has licensed plumbers and waterproofing crews under one roof, so you get a basement waterproofing plumber and a waterproofing specialist from the same company, with one warranty.
Waterproofing keeps water out of your walls. Your drains carry it away. When a drain or sewer line fails, even a dry basement can flood, so our drain team handles that side too.
Leaky wall, wet floor, or a crack you’ve been watching for years? We’ll come to your home, find the source and give you a straight written quote. No pressure. No runaround.
Just honest advice from the waterproofing company Mississauga families have trusted for over 20 years, backed by a 25-year transferable warranty on every job.
Waterproofing basement Mississauga homes for 20+ years. Free inspection. Written quote. 25-year warranty. Emergency service available.
905-238-6800