Keep Your Ottawa Basement Dry, Year After Year
Spring melt, summer storms, sewer backup, cracked foundations. We find what is letting water in and stop it at the source, backed by a 25-year written guarantee.
- Free & no obligation
- Local Ottawa crews
- 25-year guarantee
4.9★Google rating from Ottawa homeowners
2,000+Basements waterproofed in the region
25-YearWritten waterproofing guarantee
7 DaysA week, with 24/7 emergency response
Why Ottawa basements take on water
Ottawa sits between three rivers, the Ottawa, the Rideau and the Jock. When snow melts in spring or a summer storm drops 50mm in an hour, groundwater rises against your foundation and city sewers fill faster than they can drain. The 2017 and 2019 floods hit Cumberland, Constance Bay and Britannia hard, but the quieter problem is everywhere: sewer backup and slow seepage in finished basements across Barrhaven, Kanata and Orleans.
The clay-heavy soil under much of the region holds water tight against the concrete long after the rain stops, so pressure keeps pushing through hairline cracks and old mortar joints. A damp corner today is a flooded rec room next spring. Catching it early is the cheapest fix you will ever make.
One crew for every water problem
From a single foundation crack to a full flooded basement, DGI handles it. Tap a service, then grab your free inspection.
Basement Waterproofing
Interior drainage and sump systems that keep finished basements dry through spring melt.
Get a quote →
Foundation & Exterior
Exterior membranes and crack injection that stop water before it reaches the wall.
Get a quote →
How it works
Three easy steps to a dry basement, with no pressure and no surprise costs.
Free inspection
We come out, find exactly where the water gets in, and explain it in plain language.
Custom fixed quote
A clear plan priced by the linear foot. You know the cost before we start, no hidden fees.
Dry & guaranteed
We do the work clean and fast, then back it with a 25-year written guarantee.
Ottawa homeowners trust DGI
“Our Barrhaven basement leaked every spring. DGI found the cracked foundation, fixed it in two days, and it has been bone dry since. Clear pricing too.”
“Sewer backup scare after a big storm in Orleans. They installed a backwater valve and sump pump and walked me through the city rebate. Professional crew.”
“Got three quotes. DGI was the only one who actually explained the problem instead of just selling. Kanata home, exterior waterproofing, no more damp smell.”
What waterproofing costs in Ottawa
We price most work by the linear foot, so the quote matches your home and budget. No vague estimates, no surprise add-ons. Here is the honest range before your free inspection sets the exact number.
*Prices are approximate and vary with each project. Many Ottawa homeowners offset the cost with the city rebates below.
What your home’s age says about the fix it needs
Older Ottawa core (pre-1970): Centretown, the Glebe, Old Ottawa South and Hintonburg homes often sit on stone or concrete-block foundations. Water sneaks through aging mortar joints. Best fix: exterior waterproofing and crack repair.
Suburban build-out (1970 to 1995): much of Nepean, Gloucester and older Kanata and Orleans. Poured concrete, but the original weeping tile and exterior coating are past their service life. Best fix: exterior waterproofing, crack injection, and an interior drainage system with a sump pump.
Newer neighbourhoods (post-1995): Barrhaven, Stittsville, Kanata Lakes and newer Orleans. Solid poured concrete, so the real risk is urban flooding and sewer backup during heavy storms. Best fix: interior waterproofing, sump pump, and a backwater valve.
Ottawa pays you to flood-proof your home
The City of Ottawa’s Residential Protective Plumbing Program reimburses homeowners who install flood-protection devices. Real money, covering most of the work we do to stop sewer backup and groundwater.
Plus 100% of the building permit fee. The city pays the lesser of the cap or the actual cost. DGI does the install and handles the paperwork so the rebate actually lands.
Local crews across the Ottawa region
Not a call centre three provinces away. Our trucks work Ottawa and the surrounding communities every week, so help is close and the quote is quick.
Our Ottawa team at work
Certified, insured, and on your side
GUARANTEE
IICRC
Certified
WSIB
Insured
4.9★
Google
Upfront
Pricing
Questions Ottawa homeowners ask
Is the inspection really free?
Yes. We come out, assess where the water is getting in, and give you a clear written quote. No charge, no obligation to book the work.
How much does waterproofing cost in Ottawa?
Most jobs are priced by the linear foot. Interior waterproofing usually runs $50 to $200 per linear foot, exterior runs $50 to $300+ depending on depth and access, and a single foundation crack is typically $1,500 to $3,000. Your inspection gives you the exact figure.
Can you help me get the City of Ottawa rebate?
Yes. We install the backwater valve or sump pump that qualifies and walk you through the Residential Protective Plumbing Program paperwork, which can return $1,000 to $3,000 plus your permit fee.
Are you licensed and insured?
We are IICRC certified and fully WSIB covered, so you are protected and the work meets code.
How long does the work take?
Most interior systems and crack repairs are done in one to three days. Larger exterior excavation jobs take longer. We give you a firm timeline with the quote.
Do you guarantee the work?
Yes. Our waterproofing comes with a 25-year written guarantee. If water comes back through the area we treated, so do we.
Which areas do you serve?
Ottawa, Nepean, Kanata, Orleans, Barrhaven, Stittsville, Gloucester, Cumberland and Rockland.
Stop worrying every time it rains
Book your free Ottawa basement inspection today. We will tell you exactly what is going on and what it costs to fix, with no pressure.