Settled Concrete? Here’s What You Can (and Shouldn’t) Do About It
Concrete settlement is a widespread challenge across Edmonton and the surrounding regions of Central and Northern Alberta. Whether you are a homeowner with a sinking driveway or a facility manager dealing with uneven warehouse floors, the consequences of sunken concrete can be both hazardous and costly. At Osco Mudjacking & Construction Ltd., we’ve been helping Albertans address concrete settlement since 1952. With over 70 years of hands-on experience, we understand what works — and what doesn’t.
This article walks you through your options — from ineffective “band-aid” solutions to advanced repair techniques — so you can make the most informed decision for your property and budget.
Key Takeaways
- Quick fixes often lead to bigger problems. Grinding or ignoring settled concrete only masks the issue — without fixing the underlying cause.
- Mudjacking and polyjacking are efficient, cost-effective, and long-lasting alternatives to full slab replacement.
- Stabilizing the base with engineered materials ensures your lifted concrete stays level and durable for years.
1. Doing Nothing: The Cost of Inaction
When concrete starts to sink, shift, or crack, it’s tempting to ignore the problem — especially if it hasn’t yet caused significant inconvenience. But waiting can turn a minor issue into a major liability.
Why inaction is risky:
- Safety Hazards: Uneven surfaces are trip hazards, especially on high-traffic walkways or driveways.
- Water Drainage Problems: Sunken slabs often redirect rainwater toward foundations, leading to long-term structural damage.
- Escalating Repair Costs: Settlement rarely stops on its own. The longer you wait, the more extensive (and expensive) the fix.
Ignoring the problem won’t make it go away. It will likely cost you more down the road — financially and structurally.
2. Grinding: Cheap but Costly in the Long Run
Concrete grinding is often offered as a low-cost solution. It involves shaving down high spots to create a level-looking surface. While it might temporarily improve aesthetics, it’s a cosmetic fix that doesn’t address the underlying problem.
Why grinding falls short:
- Surface Weakening: Grinding removes the slab’s durable top layer, reducing strength and resistance to wear.
- No Void Repair: Settlement is often caused by empty spaces under the slab. Grinding doesn’t fill these voids, so further sinking is inevitable.
- Unreversible: Once the material is removed, you cannot go back. If you wish to lift that slab later, it will be too late.
Concrete grinding provides a temporary visual solution but can compromise long-term durability and limit future repair options.
3. Full Concrete Replacement: The Costly Last Resort
Some contractors are quick to recommend total replacement — breaking up the old concrete, regrading the area, and pouring new slabs. While it can be necessary at times, it is often unreasonable.
Why replacement may not be ideal:
- Disruption: The process can take days to weeks, especially with cure times of up to 28 days.
- High Cost: It’s the most expensive solution, involving labour, materials, disposal, and downtime.
- Mismatch & Movement: New slabs rarely match existing ones, and if the underlying cause of settlement isn’t corrected, the new concrete may also sink.
This method is best suited for severely damaged slabs or when the structural integrity has been compromised beyond repair.
4. Mudjacking and Polyjacking: The Osco Advantage
The most efficient and cost-effective way to address settled concrete is to lift and stabilize it — not replace it. That’s where Osco’s experience comes in. We offer mudjacking and polyurethane foam jacking (polyjacking) to accommodate various project needs.
Mudjacking: Tried, True, and Trusted Since 1952
- Drills small holes (1″–1.5″) into the slab.
- Pumps a dense, cementitious grout beneath the concrete.
- Fills voids, compacts the subgrade, and raises the slab to its original level.
This is ideal for large slabs, heavy loads (such as warehouse floors and garage pads), and for filling deeper voids.
Polyjacking: Lightweight and Precise
- Utilizes smaller holes (⅜”–⅝”) and expands lightweight polyurethane foam under the slab.
- The foam expands to lift the concrete and seal voids simultaneously.
It is ideal for aesthetic surfaces, such as stamped concrete, tight access areas and residential use.
Both methods are noninvasive, cost-effective, and fast. Most projects are completed in hours, and surfaces are ready to use the same day.
Durable, efficient, and tailored to your property. Trust Osco’s knowledgeable crews to select the right method for your unique site conditions.
5. Void Filling: The Unsung Hero of Concrete Repair
Many concrete problems originate from — or are made worse by — voids beneath the slab. These empty pockets destabilize the concrete above, whether due to water erosion, poor compaction, or subgrade washout.
At Osco, void filling is integrated into every slab lifting job. Our custom mix designs — including thermal grout and lightweight cellular concrete — are engineered for lasting results.
Benefits of void filling:
- Prevents future collapse or re-settlement.
- Ensures even pressure during lifting.
- Enhances long-term slab stability.
This step is crucial, as it provides the foundation for a lasting repair.
6. Slab Stabilization Without Lifting
Not every concrete surface needs to be raised. Sometimes, the slab is level but lacks support, which causes it to rock or vibrate under weight.
In such cases, Osco offers stabilization-only services, injecting material beneath the slab to eliminate movement and prevent long-term wear.
This technique is beneficial for:
- Warehouse floors under forklifts
- Sidewalks near foundations
- Driveways where the top looks level but shifts with weight
This subtle but strategic solution extends the slab lifespan and prevents safety issues.
Why Choose Osco?
Choosing the right contractor matters as much as choosing the correct method. Osco Mudjacking & Construction Ltd. is proud to be Western Canada’s longest-serving concrete lifting and pressure grouting provider. Here’s what sets us apart:
- Locally Owned & Operated Since 1952
- Specialized Crews and Proprietary Equipment
- Wide Service Area: Edmonton, Central & Northern Alberta
- Customized Mix Designs: Including thermal and cellular options
- Diverse Project Experience: Industrial, commercial, municipal, and residential
Whether you manage a refinery, a condo complex, or a single-family home, we bring professionalism, precision, and pride to every job.
Summary
Concrete settlement can lead to safety hazards, poor drainage, and costly damage if left untreated. Many quick fixes — like grinding or ignoring the issue — do more harm than good. Full concrete replacement is expensive and often unnecessary. The most effective approach is lifting and stabilizing existing slabs using mudjacking or polyjacking. At Osco Mudjacking & Construction Ltd., we’ve specialized in these methods since 1952, offering long-lasting solutions tailored to Edmonton and Northern Alberta’s needs. Our process includes void filling and stabilization for optimal results. Don’t wait — protect your property today.
Frequently Asked Questions
What causes concrete to settle?
Common causes include soil erosion, freeze-thaw cycles, water drainage issues, and poor subgrade compaction.
Is grinding a good long-term fix?
No. Grinding only smooths the surface and weakens the slab without addressing voids or subbase issues.
When is replacement necessary?
Only when slabs are severely damaged or structurally unsalvageable. It is usually a last resort.
What is the difference between mudjacking and polyjacking?
Mudjacking utilizes a cement-based grout, which is ideal for heavy slabs, while polyjacking employs expanding foam, making it suitable for tight spaces and aesthetic considerations.
How long does a repair take with Osco?
Most projects are completed in hours and ready for use the same day.
Do It Right the First Time
Concrete repair isn’t just about appearance — it’s about solving the root problem. At Osco Mudjacking & Construction Ltd., we deliver long-lasting results through professional mudjacking, polyjacking, and pressure grouting. With 70+ years of trusted service across Edmonton and Northern Alberta, we bring the right tools, experience, and approach to every project. Don’t wait — request your no-obligation assessment today, and let us lift, stabilize, and protect your concrete with confidenc.