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Interior Basement Waterproofing Company in Mississauga

Mississauga's trusted interior basement waterproofing specialists. We stop water intrusion with proven interior drainage systems, sump pumps, and waterproofing solutions backed by a 25-year transferable warranty.

Call 905-238-6800
Request Your Free Inspection
  • Confidential
  • Takes 5 seconds
  • No obligation

Why Homeowners Pick Our Waterproofing Company

DrainCom is the

No. 1 Rated

choice for licensed and insured basement waterproofing services in Mississauga, Canada.

Interior leaks are sneaky. The water doesn’t pour in – it seeps up through the floor-wall joint and weeps through the block until one day your finished basement smells like a damp cellar. We deal with that pressure the smart way: catch the water under the slab, route it to a sump pump, and send it out before it ever reaches your living space.

We’ve done this a lot. More than 20,000 homes waterproofed, 300,000-plus linear feet of basement walls sealed, and a 5 on HomeStars from over 800+ reviews to show for it. Your basement problem isn’t a new one to us.

Call us at 905-238-6800

for a free drain inspection and quote, or fill out the request form at the top of this page.

What Homeowners Say About DrainCom

Interior Waterproofing Services Built Around Your Basement

Exterior basement waterproofing services including excavation, membrane application, and drainage system installation

Interior Drainage System Installation

Many Mississauga homes sit on clay-rich soil that traps water and builds hydrostatic pressure under your floor. An interior drainage system catches that water and routes it to your sump pump before it pools.

Delta MS Drainage Membrane

Older foundation walls let moisture creep through over time. We install a Delta MS membrane against the wall to create an air gap, directing moisture into the drainage system instead of your finished space.

Sump Pump Installation and Repair

Heavy rain and melting snow push Mississauga groundwater up fast. Without a working sump pump, that water floods your basement. We install and repair sump pumps in mississauga that clear it before damage hits, plus battery backups.

Backwater Valve Installation

Backwater valve installation in Mississauga is your defense when a big storm overloads the city sewer lines and pushes wastewater back up through your basement drains. Trust us, that’s a mess you never want – a backwater valve blocks reverse flow before it reaches your home.

Interior Foundation Crack Repair

Mississauga’s freeze-thaw cycles are hard on concrete. Small cracks widen every winter, and even a hairline crack is a doorway for water. We seal interior foundation cracks to shut off the leak at its start.

Weeping Tile Repair and Replacement

Plenty of older Mississauga homes have weeping tile that’s clogged, crushed, or worn out. When it stops draining, water piles up around your foundation and pressure builds. Our weeping tile repair and replacement in Mississauga restores proper drainage and protects your foundation.

French Drain System Installation

Some properties have poor grading or collect surface water every time it rains. A French drain captures that water and carries it away from your foundation, so less saturation forces its way inside.

Window Well Repair and Drainage

A blocked window well fills like a bathtub in a downpour, and water seeps through the frame into your finished basement. We repair the window well and fix the drainage in Mississauga so water drains down and out.

Turn Your Dry Basement Into Something More

A dry basement gives you back square footage you’re probably not using right now. Here’s what our customers do with it once the water problem is gone for good:

  • Home office — a quiet workspace with no worry about damp carpet or that musty smell.
  • Home gym — keep your equipment safe and rust-free in a clean, dry room.
  • Family room — movie nights, game nights, somewhere to spread out.
  • Kids' playroom — a safe, dry floor for the little ones.
  • Rental income — a dry basement is step one toward a legal basement apartment where your municipality allows it.
  • Safe storage — protect furniture, photos, and seasonal gear from moisture and mould.
How to Fix a Leaky Basement Wall from The Inside Advice for Toronto Area Homeowners

Basement lowering and underpinning can add even more headroom and value. Ask us if that’s on your radar.

Interior Basement Waterproofing Cost in Mississauga: No Surprises

Interior waterproofing across the GTA usually runs from $100 to $240 per linear foot. That’s a wide range, and it comes down to a handful of things about your specific home:

  • Perimeter length and how deep we need to excavate
  • Foundation type: poured concrete, concrete block, or stone
  • The condition of your existing drainage pipes and weeping tile connections
  • Whether the job includes a sump pump or backwater valve
ServiceApproximate Cost (CAD)
Interior Waterproofing$100 – $240 per linear foot
Sump Pump + Tank$2,200 – $3,500
Sump Pump (Unit Only)$900 – $1,200
Sump Pump Battery Backup$1,280 – $1,600+
Backwater Valve (Inside Installation)$2,200 – $2,700
Foundation Crack Repair$1,800 – $3,700
Window Well Repair (Regular)$1,900 – $3,500

 

These are ballpark figures. You get a detailed written quote after your free on-site inspection, and the price we quote is the price you pay. No surprise change orders once the work begins.

💰 City Rebate Alert: Sump pump and backwater valve installations may qualify for basement flood prevention rebates through the Peel Region program. Eligible Mississauga homeowners can claim available rebates, and we handle the paperwork and inspection assistance for you. Rebate amounts and eligibility change, so we confirm what’s current before you commit.

What Factors affect the Cost of Interior Basement Waterproofing Services?

Exterior basement waterproofing services including excavation, membrane application, and drainage system installation

Size of Your Basement

Larger basements require more materials and labour, which increases the overall project cost.

Length of the Waterproofing System

Interior waterproofing is typically priced by the linear foot. A longer basement perimeter requires a larger drainage system.

Foundation Type

Poured concrete, concrete block, and stone foundations each require different waterproofing methods and repair techniques.

Water Damage Severity

Minor water seepage is usually less expensive to repair than basements with ongoing leaks, mould, or structural damage.

Existing Drainage System

Older or damaged weeping tiles and drainage pipes may need repair or replacement before a new waterproofing system can be installed.

Additional Waterproofing Services

Adding a sump pump, backwater valve, foundation crack repair, or window well drainage will affect the total cost of your Mississauga waterproofing project.

The Real Reasons Mississauga Basements Get Wet

Mississauga sits on heavy Peel clay, with pockets of clay and shale near the Credit River and a high water table close to the Lake Ontario shoreline. Add our climate and a lot of aging infrastructure, and local basements take a beating. These are the usual suspects behind the leaks we see:

  • Peel clay and shale — dense local soil holds water and pushes it hard against your foundation after rain.
  • Lake Ontario water table — homes closer to the shoreline deal with groundwater sitting high beneath the slab.
  • Heavy rainfall — intense storms saturate the ground and overwhelm home drainage fast.
  • Spring snowmelt — melting snow raises groundwater and the risk of seepage right along with it.
  • Freeze-thaw cycles — with frost reaching roughly four feet down, repeated freezing widens foundation cracks winter after winter.
  • Aging weeping tile — older systems across Mississauga clog or collapse and stop draining.
  • Hydrostatic pressure — trapped water pushes on your walls and floor until it finds a gap.
  • Foundation cracks — even small ones let groundwater in over time.

Red Flags That Say It's Time for a Waterproofing Contractor

Small warning signs turn into big repair bills if you leave them. Spot any of these? Time to get your basement looked at.

  • Water seepage where the wall meets the floor, or through cracks after heavy rain.
  • Musty odours that hang around, a sign moisture is trapped behind walls or under the slab.
  • Efflorescence — those white chalky stains on concrete mean water is moving through the wall.
  • Damp basement walls or dark patches that won't dry out.
  • Mould or mildew growth, which drags down your indoor air quality.
  • Peeling paint or bubbling drywall on finished walls.
  • Standing water or puddles after a storm. finished walls.
How to Fix a Leaky Basement Wall from The Inside Advice for Toronto Area Homeowners

Not sure what you’re looking at? Send us a photo or book a free inspection. We’ll give you an honest read.

How We Get Your Basement Dry, Step by Step

Free Inspection

We check your basement for leaks, moisture, cracks, and drainage trouble, and we pin down the source before we recommend anything.

Area Preparation

We cover your floors and belongings and set up the work zone to keep your home clean.

Perimeter Drainage

We remove the concrete along the perimeter and install a new interior drainage system that collects groundwater and carries it to the sump pit.

Delta MS Membrane

We run the membrane along the foundation wall so moisture gets channelled into the drain instead of into your room.

Sump Pump Installation

Water flows to the sump pit, and the pump discharges it well away from your foundation.

Crack Sealing & Concrete Restoration

We seal the cracks, pour the concrete back, and leave your basement clean and ready to use.

Most jobs wrap in one to three days. We show up on time, and we tidy up before we leave.

Confirm Your Rebate Eligibility →

Call 905-238-6800

What Interior Basement Waterproofing Does for Your Home

Interior waterproofing does a lot more than stop a leak. It protects the whole house.

  • Stops Water Intrusion during heavy rain and spring snowmelt..
  • Protects Your Foundation by relieving hydrostatic pressure on the walls..
  • Prevents Mould Growth by keeping moisture under control.
  • Improves Indoor Air Quality by cutting damp odours and humidity.
  • Protects Finished Basements flooring, drywall, furniture, and belongings.
  • Reduces Future Repair Costs by solving the problem before it turns structural.
  • Adds Long-Term Value a dry basement is a real selling point down the road.
basement waterproofing Service Toronto GTA

Mississauga Flood Rebates: We Handle the Paperwork

Toronto basement flooding prevention rebate

Peel Region runs a basement flooding prevention subsidy that helps offset the cost of approved flood protection. Depending on the measures installed, eligible Mississauga homeowners may claim meaningful rebates on sump pump and backwater valve work.

One catch worth knowing: in Ontario, the work has to be done by a licensed contractor for it to qualify. Homeowner DIY jobs are not eligible. We’re licensed, our installs are code-compliant, and we handle the documentation and inspection support so you’re not stuck fighting municipal paperwork on a Saturday.

Rebate programs and dollar amounts change from year to year. We confirm the current Peel and City of Mississauga figures and eligibility during your free inspection.

Mississauga Flood Rebates: We Handle the Paperwork

Mississauga homeowners can access a basement flooding prevention subsidy that helps offset the cost of approved flood protection. Depending on the measures installed, eligible Mississauga homeowners may claim meaningful rebates on sump pump and backwater valve work.

One catch worth knowing: in Ontario, the work has to be done by a licensed contractor for it to qualify. Homeowner DIY jobs are not eligible. We’re licensed, our installs are code-compliant, and we handle the documentation and inspection support so you’re not stuck fighting municipal paperwork on a Saturday.

Rebate programs and dollar amounts change from year to year. We confirm the current Peel and City of Mississauga figures and eligibility during your free inspection.

Why DrainCom Is Mississauga's Go-To Waterproofer

  • 20+ years of waterproofing experience

Draincom have kept Mississauga and GTA basements dry for over two decades, and we’ve solved just about every water problem a home can throw at us.

  • A track record you can check.

More than 20,000 homes waterproofed. Over 300,000 linear feet of basement walls sealed. 700,000 feet of membrane and weeping tile installed. 800+ reviews on HomeStars at a 5/5 rating.

  • 25-year transferable warranty.

 Most of our interior systems come with it, so you get long-term protection, and it carries over if you sell.

  • Licensed and experienced specialists.

Our crew follows proven methods and treats your home like their own, right down to cleaning up after themselves.

Request Your Free Inspection
  • Confidential
  • Takes 5 seconds
  • No obligation

Top Rated Waterproofers just a call away!

Business Hour:
Monday to Friday: 8a.m -9p.m
Saturday and Sunday: 9a.m – 2p.m

Call 905-238-6800

Frequently Asked Questions

It collects the water that gets in around your foundation and directs it into a drainage system connected to a sump pump. The pump moves it away from your home, keeping your basement dry and protected from future damage.

 It depends on your basement size, foundation type, and the system you need. Interior work typically runs $100 to $240 per linear foot. You get a free on-site inspection and a written estimate before any work starts.

Most projects are done in one to three days. Larger basements or jobs with extra repairs can take a bit longer, and we’ll give you a clear timeline after the inspection.

Installed and maintained properly, it gives you long-term protection. We back most interior systems with a 25-year transferable warranty.

Usually, yes. The drainage system needs somewhere to send the water, and the sump pump does that job. We’ll confirm during the inspection whether your home needs one.

It removes the moisture mould needs to grow. If mould is already present, it should be treated separately before or after the waterproofing.

Yes. We remove only the materials we need along the perimeter, install the system, then restore the concrete and leave the space clean.

Interior work manages water after it reaches the foundation by channelling it into a drainage system. Exterior basment waterproofing work in Mississauga stops water before it reaches the foundation at all. The right choice depends on your home and the source of the leak, and we’ll walk you through it.

Fast. We offer 24/7 emergency service, and we work across Mississauga every day, so we can usually get a truck to you quickly, even on short notice.

We do. We’re a licensed basement waterproofing contractor in Mississauga, our installs qualify, and we handle the documentation and inspection assistance so you don’t have to chase the paperwork yourself.

Ready for a Dry Basement? Start Here

Don’t let a small leak grow into a big one. Our team will inspect your basement, find the source, and recommend the right interior waterproofing solution for your home.

You’ll get honest advice, a detailed written estimate, and zero pressure to move forward.

Book Your Free Basement Inspection
Call 905-238-6800

Our Related Services

How to Fix a Leaky Basement Wall from The Inside Advice for Toronto Area Homeowners

These services work hand in hand with interior basement waterproofing. If your free inspection turns up more than one issue, we can handle it all in a single visit:

Our Service Area

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