Ottawa’s Basement Waterproofing Specialists
Basement Waterproofing in Ottawa
Wet basement? Foundation crack? We stop water at the source: interior drainage, exterior membranes, crack injection and sump systems.
Why Ottawa basements leak and flood
Ottawa sits largely on Champlain Sea “Leda” clay, a sensitive marine soil that swells when wet and shrinks as it dries. Add 30-plus freeze-thaw cycles every winter and you get the cracked foundations and spring seepage we’re called out for week after week.
Whether you own a century home in the Glebe, a 1980s build in Orléans or a new-build in Barrhaven, the water problem is local and so is the fix. As Ottawa’s basement waterproofing specialists, we diagnose the actual water path, not just the symptom, then choose the right repair, from a simple crack injection to a full exterior membrane. New here? Learn the most common causes of basement flooding in Ottawa or how foundation sealing actually works.
- Free, no-pressure inspection with a written diagnosis
- Interior & exterior solutions: we recommend the cost-effective one
- Fixed-price quotes, so there are no surprises
- Serving every Ottawa neighbourhood, 7 days a week
Get Your Free Waterproofing Quote
No-obligation inspection. We respond same day.
What We Do
Our basement waterproofing services
Exterior Foundation Waterproofing
Excavation, foundation cleaning and a full exterior membrane, the gold-standard fix for chronic leaks.
Learn more →Interior Waterproofing & Drainage
Interior perimeter drainage and a sump system that move water away from your foundation for good.
Learn more →Foundation Crack Repair
Polyurethane and epoxy crack injection that seals leaking poured-concrete cracks against water under pressure.
Learn more →Foundation Repair
Crack repair, wall stabilization and drainage for leaking, cracked or settling foundations across Ottawa.
Learn more →Sump Pump Installation & Backup
New sump pits, high-capacity pumps and battery backups so a spring melt never floods your basement.
Learn more →Backwater Valve Installation
A one-way backwater valve that stops a surcharged city sewer from pushing sewage back up into your basement drains.
Learn more →Areas We Serve
Basement waterproofing across Ottawa
Click your neighbourhood for local soil notes, common problems and recent projects nearby.
Basement Waterproofing Kanata
Settlement cracks in newer Bridlewood and Kanata Lakes poured-concrete foundations.
View Kanata →Basement Waterproofing Barrhaven
Hairline and stair-step settlement cracks in 5–15-year-old poured foundations.
View Barrhaven →Basement Waterproofing The Glebe
Damp, musty stone and rubble foundations in pre-1930 homes.
View The Glebe →Basement Waterproofing Hintonburg
Crumbling parging and damp stone foundations in pre-1925 homes.
View Hintonburg →Basement Waterproofing Orléans
Settlement cracks in 1980s–90s Convent Glen and Fallingbrook foundations.
View Orléans →Basement Waterproofing Stittsville
Settlement and hairline cracks in 5–20-year-old poured foundations.
View Stittsville →Basement Waterproofing Nepean
Aging or collapsed clay weeping tile under 1950s–70s City View, Arlington Woods and Bells Corners homes.
View Nepean →FAQ
Basement waterproofing in Ottawa, FAQs
How much does basement waterproofing cost in Ottawa?
It depends on the cause. Sealing a single foundation crack typically runs $400–$900; an interior weeping-tile drainage system is usually $8,000–$15,000; and a full exterior membrane runs about $15,000–$30,000+. You get a fixed quote after a free inspection.
Should I get interior or exterior waterproofing?
Interior drainage with a sump pump is the cost-effective fix for a high water table or seepage where the floor meets the wall and it’s ideal for basements you plan to finish. An exterior membrane is the longest-lasting fix for chronic leaks and older stone foundations. We recommend whichever actually solves your water path, not the most expensive option.
Do you offer free inspections?
Yes. Every quote starts with a free, no-obligation inspection and a written diagnosis, usually available the same day, across Ottawa and the surrounding suburbs.
How long does basement waterproofing take?
It depends on the fix. A crack injection is usually done in a single visit; a full interior or exterior system typically takes one to a few days. We give you a timeline along with your quote.
What are the early signs my basement needs waterproofing?
Watch for a musty smell, white chalky efflorescence on the walls, cracks that weep during rain, peeling paint, damp staining where the floor meets the wall and pooling water after storms or spring melt.
Which Ottawa areas do you serve?
We serve every Ottawa neighbourhood, including Kanata, Barrhaven, the Glebe, Hintonburg and Orléans, seven days a week, with same-day inspections in most areas.
Got water in your basement? Let’s stop it.
Free inspection, honest diagnosis, fixed-price quote. Most repairs are completed in a single day.
Get My Free Quote or call (343) 504-1033