What Is Mudjacking? A Homeowner’s Complete Guide

If you’ve noticed your driveway sinking, your sidewalk creating a trip hazard, or water pooling against your foundation, you’re dealing with a common problem that affects millions of homes across North America. The good news? There’s a practical, affordable fix that doesn’t require tearing everything out and starting over. This guide walks you through everything you need to know about mudjacking, from how it works to what it costs and whether it’s the right solution for your property.

Key Takeaways

Mudjacking is a cost-effective alternative to full concrete replacement, typically completed in a single day with minimal disruption to your property.

Concrete that is settled but structurally intact is an ideal candidate; early action keeps repairs simpler and less expensive.

Long-term results depend on addressing root causes such as poor drainage and soil instability, not just the lift itself.

Quick Answer: What Is Mudjacking and When Should You Use It?

Mudjacking is a concrete leveling method that lifts sunken slabs, such as driveways, sidewalks, patios, and steps, by pumping a cement-based slurry mixture beneath the concrete surface to fill voids and restore the slab’s original position. Think of it as giving your concrete a solid foundation again, without the mess and expense of demolition.

This technique works best when your concrete has settled but remains mostly intact. If your slab is cracked but still in one piece, mudjacking offers a budget-friendly alternative to full replacement. However, if your concrete is crumbling or severely deteriorated, new concrete may be the better path.

Here are common scenarios where homeowners in Alberta turn to mudjacking:

Sidewalk joints that have created a noticeable lip or trip hazard
A garage floor that has dropped away from the driveway
Front porch steps that have sunk and no longer align properly
A patio that now slopes toward the house, causing pooling water near the foundation
Driveway panels that have settled unevenly over the years

Most residential mudjacking jobs wrap up in a single day, often just a few hours, at a fraction of the cost of tearing out and pouring new concrete, which involves demolition crews, longer downtime, and significantly higher overall expenses.

What Is Mudjacking?

Mudjacking, sometimes also called slab jacking, is the traditional method for raising sunken concrete by injecting a pumpable mixture beneath the slab until it lifts back into place. The technique has been used across North America since the mid-1900s and remains a reliable solution for property owners dealing with settled flatwork.

The slurry mixture typically includes:

Portland cement for binding strength
Sand or soil for bulk and density
Agricultural lime or crushed limestone in some regional variations
Water to create a pumpable consistency

Once injected and cured, this cement slurry creates a dense, rock-like base that supports the concrete slab and fills the voids that caused the settling in the first place.

Common residential applications include driveway panels that have dropped by 1 to 4 inches, sidewalk sections that are misaligned with neighbouring panels, sunken front steps or porch landings, pool decks that have settled toward the pool, and garage or basement slabs that have tilted away from the walls.

Mudjacking relies on the existing concrete still being mostly intact. Hairline cracks and moderate surface damage are usually acceptable, but slabs that are crumbled, shattered, or missing chunks are generally poor candidates. Also worth noting is that mudjacking is designed for flatwork (horizontal concrete surfaces). It is not a foundation repair method for structural walls. Bowing basement walls or structural foundation cracks require different approaches.

How Does Mudjacking Work?

The mudjacking process typically takes just a few hours for a standard two- to four-panel driveway or a short sidewalk run. Compared to demolition and repour, which can take days and leave your property torn up, it’s a remarkably low-impact repair.

Here is how the process unfolds:

Inspection and planning. The contractor measures the degree of settlement at various points and identifies the underlying cause. Strategic lift points are marked across the slab based on where support is needed most.
Hole drilling. Holes, typically one to two inches in diameter, are drilled at even intervals across the sunken area to allow for controlled, uniform lifting.
Slurry injection. A hydraulic pump forces the slurry mixture beneath the concrete. As voids fill, pressure builds, and the slab gradually rises. Technicians monitor the lift at multiple points to avoid cracking or over-lifting.
Patching. Once the slab reaches its target level, the drilled holes are patched with a compound that closely matches the surrounding concrete. Minor colour variation is normal.

For a typical 10’ × 20’ slab, you can expect roughly four to eight small patched circles to remain visible afterward.

Timing Expectations

Activity	Wait Time
Walking on the surface	Same day (often within hours)
Parking passenger vehicles	Approximately 24 hours
Heavy loads (RVs, trailers)	48–72 hours or longer

Be wary of anyone promising to raise a slab from a single hole in one shot. Controlled pumping from multiple lift points is essential to prevent cracking and achieve an even result.

When Is Mudjacking a Good Solution for Yor Home?

Mudjacking is situational; it works well in many cases, but it is not right for every concrete problem. The evaluation focuses on three main factors: slab condition, soil stability, and the amount of movement that has occurred.

Signs that mudjacking is appropriate include concrete slabs that have dropped but remain intact, joints that are misaligned by roughly half an inch to four inches, water pooling near the house instead of draining away from the foundation, visible trip hazards at sidewalk or walkway transitions, and garage floors that have pulled away from the driveway connection.

However, mudjacking is usually not recommended for severely broken or crumbling slabs that have lost structural integrity, slabs that have heaved upward due to frost rather than sinking, areas where the underlying soil is actively washing away, such as in sinkholes or major drainage failures, or extremely thin slabs under three inches that may not be able to withstand the lifting pressure.

Before calling a contractor, gather some basic documentation: measure the height differences between panels, note how long the problem has been present, photograph the settlement from multiple angles, and identify nearby water sources, such as downspouts, sprinklers, or poor grading. This speeds up the evaluation process and helps contractors provide more accurate estimates.

Pros and Cons of Mudjacking

Mudjacking has been a trusted concrete lifting method across North America for decades and continues to be widely used today, though newer methods like polyurethane foam lifting offer different trade-offs.

Advantages of Mudjacking:

Affordability: mudjacking typically costs significantly less than full concrete replacement.
Speed: most jobs are completed in half a day or less, minimizing disruption to your routine.
Minimal disturbance: no demolition means landscaping and adjacent structures are left intact.
Environmentally responsible: existing concrete is reused rather than sent to a landfill.

Potential disadvantages to consider include the possibility that patched drill holes may remain visible, even with skilled contractors, and the added weight of the slurry can place stress on very weak or unstable soils. Additionally, if underlying issues such as poor drainage or expansive clay soils are not addressed, the concrete may settle again over time, and heavily fractured or extremely thin slabs may not be suitable candidates for this method.

The most practical way to think about mudjacking is as a mid-life repair for concrete surfaces that still have several good years left. It is not a miracle cure for badly deteriorated slabs or a permanent fix for properties with ongoing soil movement or water problems. During your estimate, ask contractors directly about expected longevity given Alberta’s climate; freeze-thaw cycles, clay-heavy soils, and seasonal drainage patterns all play a role in how long a repair holds.

Mudjacking vs. Polyurethane Foam Lifting

Both mudjacking and polyurethane foam lifting (also called foam jacking or poly jacking) accomplish the same basic goal: lifting sunken concrete slabs back to level. The difference lies in the materials and equipment used.

Polyurethane foam offers several advantages, including being significantly lighter than cement slurry, making it especially useful in weak or unstable soil conditions. It requires smaller injection holes, typically around five-eighths of an inch compared to the one-to-two-inch openings used in mudjacking, and has much faster cure times, often supporting loads within 60 minutes. Additionally, it is water-resistant, so it will not break down from moisture infiltration over time, unlike some slurry materials.

Mudjacking, on the other hand, has its own advantages, such as a lower upfront cost per square foot in most cases and wide availability, with contractors commonly found across most regions. It also has a long, proven track record spanning decades, with many projects still performing well after 10 to 20 years, and its dense material provides excellent compressive strength for applications involving heavy loads.

For light residential applications such as front steps, walkways, and typical driveways, either method can perform well when the soil underneath is reasonably compact and drainage is properly managed. The smart approach is to get quotes for both where available, compare pricing and warranties, and listen carefully to each contractor’s assessment of your specific soil conditions. That local context often matters more than the method itself.

How Much Does Mudjacking Cost in 2026?

Mudjacking is priced per square foot and varies by region, scope, site conditions, and the amount of settlement to be corrected. Polyjacking tends to cost more per square foot but may offer advantages depending on soil conditions and the scope of work.

The one thing to consider with polyjacking is that once the foam or poly has been injected under the concrete slab, if the time comes to replace the concrete, it can not be recycled, which adds to the overall cost, as the material all needs to be taken to the dump. This cost does not occur with mudjacking.

Main cost drivers include:

The total square footage and number of slabs
The degree of settlement to be corrected
The difficulty of equipment access
The local labour and material pricing
Whether joint sealing or crack repair is included.

When evaluating mudjacking cost against full concrete replacement, ask contractors for both figures where feasible. Replacement adds demolition labour, debris removal, new concrete materials, forming, finishing, and significantly longer cure time before the surface is usable again. Collect at least two to three written quotes and confirm that each one specifies which slabs will be lifted, the target lift height, what is and is not included, and the warranty terms for both materials and workmanship.

How Long Does Mudjacking Last?

Many residential mudjacking repairs last five to ten years or longer when soil conditions and drainage are favourable. Some homeowners report that the concrete holding level has been lifted for 15 to 20 years. However, challenging conditions, including Alberta’s freeze-thaw cycles and clay-heavy soils, can shorten that timeline.

Key factors affecting longevity:

Soil type: stable, well-compacted fill holds up better than loose or expansive clay soils
Water management: proper drainage away from slabs prevents the underlying soil from washing out
Load levels: passenger cars place less stress on a slab than heavy trucks or recreational vehicles
Slurry quality: professional-grade mixes with proper cement ratios outperform cheaper alternatives

The mudjacking material itself does not decay quickly. When resettling occurs, it is almost always because the surrounding soil has shifted or eroded, conditions that homeowners can influence through drainage improvements. Practical steps to extend the life of mudjacked concrete include redirecting downspouts at least 5 feet away from concrete surfaces, ensuring positive slope grading away from the foundation, avoiding heavy loads at slab edges, keeping expansion joints sealed, and promptly addressing new drainage issues.

Many reputable contractors offer workmanship warranties ranging from one to five years against significant resettling under normal conditions. Ask exactly what is covered and what might void the warranty; heavy vehicle damage, flooding, or new landscaping that alters drainage patterns are common exclusions.

Signs Your Concrete Needs Mudjacking

Catching settlement early makes mudjacking easier, less expensive, and more visually seamless than waiting until sunken slabs have dropped dramatically or begun breaking apart.

Visual signs to watch for include a noticeable lip between two slabs exceeding about half an inch, steps that are no longer uniform in height from one riser to the next, a garage floor that has pulled away from the driveway, visible gaps beneath porch steps or stoops, and cracks that follow slab edges where settlement is occurring. Functional signs may include doors that drag across the garage floor, water puddles that consistently form near the house after rain, lawn equipment or wheeled carts catching on transitions between surfaces, and furniture or equipment that no longer sits level on the concrete.

A simple foot test can reveal voids beneath the concrete: step on one edge of a suspected slab and rock your weight. If the panel moves noticeably or sounds hollow, there is likely enough empty space beneath for mudjacking to help.

Do not ignore trip hazards. Uneven surfaces pose real injury risks and potential liability, especially for children, elderly family members, and visitors. In Alberta’s climate, settled concrete also allows water to infiltrate, worsening the problem beneath it as freeze-thaw cycles expand trapped moisture.

How to Choose a Mudjacking Contractor

Contractor selection matters more than the specific method. Even the best technique can fail if applied without proper soil evaluation, strategic hole layout, and controlled lifting pressure.

Key screening questions to ask:

How long have you been leveling concrete in this region?

How many mudjacking jobs do you complete annually?

Are you fully insured for this type of work?

Do you regularly work on residential slabs, such as driveways, sidewalks, garages, and pool decks?

To verify quality, check recent online reviews on Google or industry-specific sites, ask for before-and-after photos of projects similar to yours, request one or two homeowner references from the past 12 to 24 months, and look for membership in recognized concrete industry associations.

When comparing bids, do not focus solely on price. Compare the scope of work (which slabs, target lift heights), whether crack repair and joint sealing are included, estimated cure times, and the length and coverage of the contractor’s guarantee. A dedicated concrete lifting professional typically delivers better results than a general contractor who offers mudjacking as an occasional side service.

Maintenance Tips After Mudjacking

The same factors that caused your slab to sink, primarily water infiltration and soil movement, can still be present after repair. Basic upkeep protects your investment and extends the life of mudjacking work.

Sealing and surface care: In freeze-thaw climates, seal concrete surfaces every two to three years to limit water penetration into joints and minor cracks. Quality sealers reduce surface scaling and spalling that can compromise concrete integrity over time.

Drainage management: Proper drainage management plays a key role in maintaining leveled concrete, so it’s important to keep gutters clean and functioning properly, extend downspouts at least five to ten feet away from concrete edges, avoid directing sump pump discharge directly beside mudjacked slabs, and consider minor grading adjustments to help move surface water away from the foundation.

Winter considerations: Avoid de-icing salts on exterior slabs where possible. Salt accelerates surface deterioration and can seep into cracks, causing damage during freeze-thaw cycles. Sand or non-corrosive de-icers offer safer alternatives for traction.

Regular inspections: Walk your concrete surfaces each spring and fall, watching for new gaps between slabs, panels that rock when you step on edges, unusual cracking patterns, and signs of water pooling in new areas. Catching developing issues early allows for minor corrections before they become major re-leveling or replacement projects.

About Osco Mudjacking & Construction

Osco Mudjacking & Construction has been Edmonton’s trusted name in concrete repair and lifting since 1952. With over seven decades of hands-on experience in Alberta’s challenging climate, Osco offers a comprehensive range of services, including residential mudjacking and foam jacking, commercial concrete lifting, pressure grouting, shotcrete, and concrete crack repair. Whether you’re a homeowner dealing with a sunken driveway, a property manager overseeing multiple buildings, or a contractor requiring specialized grouting support, Osco brings the equipment, experience, and local knowledge to get the job done right.

Serving Edmonton, St. Albert, Sherwood Park, and the surrounding region, Osco is proud to be a locally rooted company committed to lasting results.

Summary

Mudjacking is a proven, cost-effective solution for many sunken concrete surfaces across Edmonton and Alberta. When your concrete has settled but remains structurally intact, mudjacking can restore safety, function, and curb appeal in a matter of hours, at a fraction of the cost of full replacement. Its suitability depends on your slab condition, the soil beneath, and the extent of movement. The best results come from working with an experienced local contractor who will assess your drainage, evaluate the soil, and set realistic expectations for longevity. Addressing underlying water and soil issues alongside the lift itself is what turns a good repair into a lasting one.

Before reaching out for quotes, walk your property and note all settled areas, approximate drop measurements, and any visible damage. This inventory helps contractors provide accurate estimates and identify whether you are dealing with isolated settlement or a broader pattern. Getting multiple quotes costs nothing and puts you in control of the decision.

Frequently Asked Questions (FAQs)

Can mudjacking be used on cracked concrete?

Hairline cracks and moderate surface cracking typically do not prevent a slab from being successfully mudjacked, provided the concrete remains structurally sound. The key factor is the slab’s overall integrity. If it is still in one solid piece, it can usually be lifted and stabilized. However, severely shattered, crumbling, or structurally compromised concrete cannot be effectively repaired with mudjacking and will generally require full replacement instead.

How long does the mudjacking process take?

Most residential jobs, such as the lifting of driveways, walkways, or a set of front steps, are completed within a few hours. You can typically walk on the surface the same day, and passenger vehicles can park on it within approximately 24 hours. Heavy loads, such as recreational vehicles, should wait 48 to 72 hours or longer.

Will the drilled holes be visible after the work is done?

Yes, small patched circles will remain visible. Skilled contractors match the patching compound as closely as possible to the surrounding concrete, but some minor colour variation is normal. Over time, weathering helps the patches blend in further.

How do I know if mudjacking or polyurethane foam lifting is better for my situation?

Both methods can deliver good results for typical residential flatwork. Polyurethane foam is lighter (an advantage in very weak soil conditions), requires smaller holes, and cures faster. Mudjacking generally has a lower upfront cost and is widely available. The best way to decide is to get quotes and assessments from contractors experienced in both methods, and let the soil and site conditions guide the recommendation.

What causes concrete to sink in the first place?

The most common causes are water erosion beneath the slab (from poor drainage, downspouts, or leaking pipes), soil compaction over time, and the natural freeze-thaw cycle, particularly relevant in Edmonton’s climate. Clay-heavy soils that expand when wet and contract when dry also contribute significantly to long-term settlement. Addressing these root causes alongside the mudjacking repair is the key to a long-lasting result.