Identifying and Repairing Concrete Cracks: Osco’s Professional Guide for Long-Lasting Concrete Performance
Concrete is one of the most reliable and versatile materials in construction—but even the strongest slabs can crack. Whether it’s a driveway in Edmonton, a warehouse in Fort McMurray, or a parkade in Red Deer, concrete cracking is a common and often unavoidable issue. The good news? Cracks don’t always mean replacement. With over 70 years of industry experience, Osco Mudjacking & Construction Ltd. provides professional concrete crack repair solutions that are time-sensitive and cost-effective.
We’ve proudly served residential, commercial, industrial, and municipal clients across Edmonton, Central Alberta, and Northern Alberta since 1952. This guide explores the most common types of concrete cracks we see in the field—and how we professionally repair them using specialized injection techniques and advanced polymer grout systems.
Key Takeaways
- Not all concrete cracks are the same. Understanding the type and cause of each crack is essential for choosing the right repair method.
- Osco uses advanced injection techniques, such as polyurethane foam, epoxy, and acrylate gel, to seal, stabilize, and restore concrete for long-term performance.
- With over 70 years of experience, Osco offers customized solutions for residential, commercial, and industrial clients across Edmonton and Alberta.
Common Types of Concrete Cracks and Their Causes
1. Shrinkage Cracks
Shrinkage cracks occur when concrete loses moisture during curing, causing it to contract. These are commonly found in basement floors, driveways, and poured foundation walls throughout Alberta.
- Cause: Uneven moisture loss and internal restraint
- Osco Solution: We seal these cracks using polyurethane resin or foam injection and, in more severe cases, epoxy injection to regain structural strength and moisture resistance.
2. Plastic Shrinkage Cracks
These cracks form within hours after pouring fresh concrete and are often seen on large exposed surfaces like slabs and garage floors.
- Cause: Rapid surface moisture loss
- Osco Solution: We use low-viscosity polyurethane resin or acrylate gel to seal the cracks and prevent water intrusion, especially during freeze-thaw cycles typical in Alberta’s climate.
3. Spalling Cracks
Spalling involves the flaking or breaking off of the concrete surface, sometimes exposing rusted rebar.
- Cause: Corrosion of embedded steel reinforcement
- Osco Solution: We apply epoxy injection to bond the concrete and protect exposed steel, followed by protective coatings to prevent future corrosion.
4. D-Cracking (Durability Cracking)
This form of cracking is a particular concern in Alberta’s cold weather and appears as long, parallel cracks near joints.
- Cause: Freeze-thaw damage caused by coarse aggregates retaining moisture
- Osco Solution: Our technicians use flexible polyurethane injection that adapts to temperature changes and remains effective in cyclical freeze-thaw conditions.
5. Corrosion Cracks
These cracks develop over time as the steel inside the concrete rusts, expands, and fractures the surrounding material.
- Cause: Steel corrosion from water and chloride intrusion
- Osco Solution: Depending on severity, we use polyurethane foam or epoxy injection to seal the crack, strengthen the concrete, and halt further corrosion.
6. Overloading Cracks
Heavy equipment, traffic, or improper structural design can lead to overloading cracks in places like industrial shop floors and commercial sites.
- Cause: Stress from loads exceeding structural capacity
- Osco Solution: High-strength epoxy injection is used to restore the slab’s load-bearing integrity.
7. Expansion Cracks
Without proper expansion joints, concrete exposed to extreme heat can expand and crack under internal stress.
- Cause: Thermal expansion without movement allowance
- Osco Solution: We use polyurethane foam, which remains flexible and absorbs expansion and contraction stress.
8. Heaving Cracks
Freeze-thaw cycles cause slabs to lift or “heave,” especially in areas with poor drainage or inadequate insulation.
- Cause: Subsurface water freezing and expanding
- Osco Solution: Polyurethane foam is injected to fill voids and flex with seasonal changes, helping the concrete settle naturally without cracking.
9. Crazing & Crusting Cracks
These hairline cracks appear on the concrete surface and resemble a spiderweb pattern. While often cosmetic, they can allow moisture intrusion if untreated.
- Cause: Rapid surface drying or over-finishing during pouring
- Osco Solution: Low-viscosity polyurethane is injected or topically applied to seal fine cracks and block moisture intrusion.
10. Disintegration Cracks
These occur due to long-term wear or exposure to harsh chemicals, leading to flaking and deeper cracks.
- Cause: Carbonation, sulfates, or poor-quality materials
- Osco Solution: We reinforce damaged areas with epoxy injection, then apply protective coatings to prevent further degradation.
11. Re-Entrant Corner Cracks
These cracks form due to stress concentration and are common around pipe penetrations, manholes, column bases, and other abrupt shape changes.
- Cause: Uneven shrinkage and stress around geometric discontinuities
- Osco Solution: We apply polyurethane or epoxy injection based on the location and severity of the crack.
12. Alkali-Silica Reaction (ASR) Cracks
Known as “concrete cancer,” ASR leads to map-like cracking patterns due to chemical reactions between alkaline cement and reactive aggregates.
- Cause: ASR gel absorbing water and expanding
- Osco Solution: We use polyurethane resin or epoxy injection to seal and stabilize the cracked areas, preventing further propagation.
Osco’s Tailored Crack Repair Systems
Thanks to our diverse experience and fully equipped crews, Osco offers custom crack repair solutions designed specifically for Alberta’s conditions and your structure’s needs. Our injection systems include:
- Polyurethane Resin and Foam: Ideal for dynamic cracks caused by moisture or freeze-thaw cycles. These flexible materials expand to fill gaps and prevent water ingress.
- Epoxy Injection: Best for structural repairs where strength and rigidity are required—perfect for load-bearing elements.
- Acrylate Gel: Used for sealing ultra-fine cracks and curtain injections in water-sensitive environments.
Our materials are engineered to be environmentally neutral, long-lasting, and highly effective, even under the most extreme local conditions.
Why Osco is Alberta’s Trusted Concrete Crack Repair Contractor
At Osco, we don’t just patch concrete — we restore, reinforce, and protect it. As Western Canada’s longest-serving concrete repair and pressure grouting professionals, we offer:
- Over 70 years of proven experience in concrete lifting and repair
- Locally owned and operated in Edmonton since 1952
- Full-service offerings, including Mudjacking, Polyjacking, Crack Injection, Shotcrete, Pressure Grouting, and more
- Custom repair plans based on detailed site assessments
- Responsive service throughout Greater Edmonton, Central Alberta, and Northern Alberta
Whether it’s a sunken driveway in Sherwood Park or cracks in an industrial slab in Grande Prairie, Osco delivers fast, dependable solutions with minimal disruption and lasting peace of mind.
Summary
Concrete cracks are common but don’t always require replacement. At Osco Mudjacking & Construction Ltd., we identify and professionally repair all types of concrete cracks—shrinkage, spalling, D-cracking, corrosion, and more—using specialized methods like polyurethane injection, epoxy resin, and acrylate gel. Each solution is tailored to the crack’s cause and severity, ensuring long-term structural integrity and moisture resistance. Backed by over 70 years of local experience, Osco proudly serves Edmonton and surrounding regions with dependable, cost-effective repairs designed for Alberta’s challenging climate and soil conditions.
Frequently Asked Questions
What causes most concrete cracks?
Cracks are typically caused by shrinkage, moisture loss, freeze-thaw cycles, corrosion, or excessive loads.
Can all cracks be repaired without replacing the concrete?
Yes—Osco repairs most cracks using injection techniques that restore strength and prevent further damage.
What materials does Osco use for crack repair?
We use polyurethane foam, epoxy resin, and acrylate gel based on the crack’s type and structural needs.
Is polyurethane injection suitable for Alberta’s freeze-thaw cycles?
Absolutely. Polyurethane remains flexible and expands with temperature changes, making it ideal for Alberta’s climate.
How do I know which repair method I need?
Our experienced team will assess the crack and recommend the most effective, long-lasting solution for your property.
Ready to Restore Your Concrete? Contact Osco Today
If you are dealing with concrete cracks, don’t wait for the damage to worsen. Contact our team today to schedule an assessment or request a quote. Osco Mudjacking & Construction Ltd. provides the experience, materials, and equipment to repair and protect your concrete — quickly, professionally, and affordably.
Experience. Dependability. Credibility. That’s the Osco standard since 1952.