Guides
Understand the slab before you fix it
Practical, even-handed information for Canadian homeowners and property managers.
Fundamentals
- What is polyjacking?Polyjacking lifts and stabilizes settled concrete slabs by injecting expanding polyurethane beneath them. How it works, when it suits, and its limits.
- How polyurethane lifting foam worksThe basic chemistry of two-part polyurethane lifting foams, lifting vs void-filling densities, and what to ask about the product being used.
- What happens during a polyjacking jobFrom assessment and utility locates to drilling, staged injection, patching and joint sealing — what a typical polyjacking job involves.
- Signs your concrete has settledTrip edges, water pooling toward the house, gaps at thresholds and hollow-sounding slabs — common signs of settlement, and what each might mean.
- Polyjacking vs mudjackingAn even-handed comparison of polyurethane lifting and cement-slurry mudjacking: materials, hole size, weight, and when each might be chosen.
- Lift or replace? Polyjacking vs new concreteHow to think about lifting a settled slab versus tearing it out and pouring new: condition, cause, disruption, and appearance.
- What affects the cost of polyjackingWe don’t publish prices. Here are the factors that drive polyjacking quotes — slab size, void volume, lift height, access and product — and how to compare them.
- Understanding polyjacking warrantiesWarranty terms vary by contractor. What to look for in writing — coverage, exclusions, transferability — before you agree to polyjacking work.
- DIY vs professional polyjackingWhy true slab lifting is generally a professional job, and the small concrete maintenance tasks homeowners can reasonably do themselves.
Homeowner guides
- Why is my driveway sinking?Loose fill, water washout, freeze-thaw and clay shrinkage are common reasons driveways settle. How to spot the cause and what to do next.
- The real costs of leaving uneven concreteTrip hazards, water directed toward foundations and progressive slab damage: the practical consequences of leaving settled concrete untreated.
- Slab settlement vs foundation settlementSettled flatwork is common and often repairable by lifting. Foundation movement is different and needs a structural professional. How to tell them apart.
- How long does polyjacking last?Longevity depends less on the foam and more on the cause of settlement. What influences how long a lifted slab stays level.
- Is there a best time of year for polyjacking?Seasonal considerations for concrete lifting in Canada — frozen ground, spring thaw, temperature and scheduling.
- How to choose a polyjacking contractorQuestions to ask before hiring: diagnosis of the cause, product used, lift control, utility locates, insurance and written warranty terms.
- Concrete leveling vs replacement: a decision checklistA simple checklist to help decide whether a settled slab should be lifted or replaced.
Have a settled slab?
Describe it, add photos if you have them, and the HAUSE intake team will review your request and confirm whether a suitable contractor is available near you.
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