Basement Waterproofing in St. Catharines
DryFort crews serve Port Dalhousie, Western Hill, Merritton and every St. Catharines neighbourhood with exterior and interior waterproofing, crack repair, and true 24/7 flood response.
The Local Picture
St. Catharines grew up around water, and that history is still visible in how the city floods today. Port Dalhousie, at the mouth of Twelve Mile Creek where it meets Lake Ontario, has 19th-century Victorian and Edwardian heritage homes alongside mid-century bungalows — original clay weeping tile in that older housing stock has had well over a century, in some cases, to deteriorate. Merritton, the former town built up along the historic Welland Canal route, has a similar story: older infrastructure serving a neighbourhood that predates most of the city's modern drainage standards.
Western Hill and Glenridge, divided by Twelve Mile Creek itself, deal with a different pressure: creek-adjacent groundwater that rises and falls with the season, putting extra stress on foundations close to the ravine even when the rest of the neighbourhood stays dry.
The City's Flood Alleviation Program (FLAP) has run since 1992 and covers up to 90% of eligible costs, to a maximum of $5,000, for single-detached and semi-detached homes built before 2012 — installing backwater valves, and disconnecting weeping tile from the sanitary sewer to a sump pump system. A free on-site assessment from the City is part of the process, which we help you schedule and prepare for.
Flood Alleviation Program (FLAP)
Up to 90% of eligible costs, to a maximum of $5,000, for single-detached and semi-detached homes built before 2012. Covers backwater valve installation and weeping tile disconnection to a sump pump system. Running since 1992; includes a free City on-site assessment as part of the process.
See the official program page →Services in St. Catharines
Exterior Foundation Waterproofing
From heritage homes in Port Dalhousie to older Merritton properties, we excavate and seal St. Catharines foundations for good.
Interior Basement Waterproofing
On established, tree-lined lots in Western Hill, an interior system fixes the leak without disturbing the landscaping.
24/7 Emergency Flood Response
From the Twelve Mile Creek ravine to the Lake Ontario shoreline, our 24/7 line dispatches across St. Catharines when a basement starts taking on water.
Sump Pump Installation & Repair
We size sump systems for St. Catharines homes near the creek and shoreline, and help you apply for the City's FLAP program.
Foundation Crack Repair
A century-plus of freeze-thaw cycles has been hard on St. Catharines' older foundations — we inject and seal cracks permanently.
Weeping Tile & Drainage Systems
Collapsed clay weeping tile is common in St. Catharines' historic neighbourhoods — we replace it and correct grading around the house.
St. Catharines Rates
Interior systems start at $120/ft ($2,800 minimum). Final price is confirmed at a free on-site visit — or get an instant estimated range online first.
All of St. Catharines
- Port Dalhousie
- Western Hill
- Merritton
- North End
- Fairview
- Glenridge
Basement Waterproofing FAQs — St. Catharines
Does St. Catharines offer a subsidy for basement flooding prevention?
Yes. The Flood Alleviation Program (FLAP) covers up to 90% of eligible costs, to a maximum of $5,000, for single-detached and semi-detached homes built before 2012 — including backwater valve installation and weeping tile disconnection to a sump pump. It's been running since 1992 and includes a free City on-site assessment. We help you prepare for it and apply.
Do I need a permit for exterior waterproofing in St. Catharines?
Backwater valve installation under the FLAP program has its own City assessment and inspection requirements. Broader exterior excavation work can also require a permit depending on scope. Simple interior crack injection generally doesn't. We confirm exactly what your job needs.
How much does basement waterproofing cost in St. Catharines?
Exterior waterproofing starts at $275 per linear foot with a $4,000 minimum job, and includes excavation, membrane, drainage board and new weeping tile. Interior systems start at $120 per linear foot with a $2,800 minimum. The exact price is confirmed at a free on-site visit.
Why do older St. Catharines neighbourhoods like Port Dalhousie and Merritton get wet basements?
Both grew up around the historic Welland Canal and Twelve Mile Creek, and the housing stock in each is old enough that original clay weeping tile has had a long time to deteriorate — in Port Dalhousie's case, over a century in some homes. It's rarely one dramatic failure; it's gradual collapse and clogging that eventually stops keeping water away from the foundation.
Wet basement in St. Catharines? We can fix it.
Get a free, no-obligation quote — or call our 24/7 emergency line right now if water is coming in.