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Concrete Patios in Dunnville
We pour concrete patios in Dunnville and at the lakeshore cottages from Port Maitland to Lowbanks. Dunnville sits at the low end of the Haldimand clay plain, where the water table near the river mouth runs high and the clay drains slowly. So we build each patio on a compacted granular base and slope it about 2 percent away from the house. Union-certified crews, a free written quote, and a lifetime warranty on labour.
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Reviewed June 2026
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Dunnville is where Haldimand County's water leaves. The town sits at the mouth of the Grand River, at the bottom of the county's clay plain. The clay drains slowly, and melt water stays in the ground for weeks each spring.
For a patio, that wet ground matters in two ways. Water that sits under a slab freezes and lifts it. And a patio that slopes the wrong way sends rain and melt at a foundation that is already in damp ground. So a Dunnville patio is a drainage job first and a place to sit second.
The full method, the 32 MPa air-entrained mix, the 100 mm slab, the compacted Granular A base and the control joints, is on our concrete patios page. This page is about what Dunnville's ground and homes change. The site visit and the written quote are free, and the number on the quote is the number you pay unless you change the job.
Wet clay near the river
On the low lots near the river and the marshes along the lower Grand, we look at where the water goes before we set a form: downspouts that empty onto the patio area, a neighbour's grade that sheds onto yours, and how wet the ground stays in spring. We dig out soft ground, build the base in compacted lifts, and slope the slab about 2 percent away from the house.
That slope protects more than the patio. Foundations in Dunnville spend many weeks in damp ground, and a patio that drains toward the house adds to it. If your basement already gets damp in spring, tell us at the visit. We plan the patio so it moves water away from that wall, not toward it.
Older backyards in town
The streets around the dam and the downtown have Dunnville's oldest houses: pre-war frame houses and post-war bungalows. If an older yard already has a cracked or sunken slab where the patio will go, the new patio starts with taking out the old slab and finding what failed under it. Our concrete removal page says what tear-out involves.
Cottage patios by the lake
Outside town, the lakeshore from Port Maitland to Lowbanks and Stromness runs to cottage work, and a patio is a common job. Shore ground sits close to the water table, so a lakeshore patio gets extra base depth and a grade that sheds storm water fast.
A slab near the water stays wetter through more freeze-thaw cycles than the same pour inland. The air-entrained mix, a full cure and a seal at about 28 days are what let the surface last. If the cottage is closed for the season, we can quote from a site visit and book the pour for when access is easy.
Finish and cure
Broom finish gives grip and is the most affordable. Exposed aggregate adds texture. Stamped concrete adds pattern and colour; see our stamped and decorative concrete page if you are weighing it. Foot traffic can go on a new patio after 24 to 48 hours, furniture after 7 days, and the patio can be sealed at about 28 days. Dunnville jobs book onto our scheduled Haldimand route days through the pouring season.
Straight answers
Our backyard stays wet every spring. Can it still have a concrete patio?
Yes, but the base and the slope do the work. We dig out soft ground, build a granular base in compacted lifts, and slope the slab about 2 percent away from the house. We also look at downspouts and the grade around the patio, because water that keeps reaching the base is what lifts a slab.
Can you pour a patio at a cottage near Port Maitland or Lowbanks?
Yes. The lakeshore cottages are regular stops on our Dunnville route days. Shore ground sits close to the water table, so we give the patio extra base depth and a grade that sheds storm water fast. If the cottage is closed, we quote from a site visit and book the pour for an easy time.
Our old patio slopes toward the house. Can you fix that?
Yes. We take out the old slab, fix what failed under it, and pour a new patio sloped about 2 percent away from the house. On Dunnville's damp ground, that slope helps keep water away from your foundation as well as off the patio.
How much does a concrete patio cost in Dunnville?
Size, the finish you choose, access to the backyard, and the base the ground needs all move the number. Wet ground near the river can need more base and drainage work than a dry lot. If the concrete truck cannot reach the forms, the crew moves the mix by pump or wheelbarrow, and the quote names that. The visit and the written quote are free, and the number we quote is the number you pay unless you change the job.
Keep reading
- Concrete Patios across Southern OntarioThe full method: mix, base, slope, joints, finishes and cure times.
- Concrete Contractors in DunnvilleEverything else we pour and repair in Dunnville, from the old streets by the dam to the lakeshore cottages.
- Concrete Driveways in DunnvilleThe same wet clay and lakeshore ground, for a slab that carries cars.
- Basement Waterproofing in DunnvilleWhen the damp ground reaches the foundation, how we keep the water out.
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