Concrete slabs are built tough, but they can still crack from stress, ground movement, and moisture. If you want to fix cracked concrete slab problems the right way, it’s important to know what’s going on under the surface. Acting early prevents bigger repairs later.
Signs You Need to Fix a Cracked Concrete Slab
- Hairline cracks spreading across the surface
- Gaps wider than 1/8 inch
- Uneven or sunken sections
- Moisture seeping through cracks
- Doors or windows sticking due to slab shift
If you see these issues, don’t wait. Schedule a professional inspection today.
Check out our blog on the signs of foundation issues to learn more about early warning signals.
Residential vs. Commercial Slabs
Residential and commercial slabs can both crack, but they behave differently under stress:
➞ Residential slabs are usually thinner and support lighter loads, but are more sensitive to soil movement and drainage issues.
➞ Commercial slabs are designed to carry heavy vehicles, machinery, and foot traffic. Cracks here often come from load stress, expansion joints failing, or subsurface voids from constant use.
The foundation repair techniques will be similar, but commercial jobs usually need larger-scale foam injection or pier systems to handle the higher demands.
Causes of Cracked Concrete Slabs
Wondering why your slab cracked in the first place? These common causes give you a good idea of what’s happening under the surface:
- Soil movement: Expansive clay swells when wet and shrinks when dry, stressing the slab.
- Bad drainage: Water pooling under the slab weakens the support base.
- Heavy loads: Commercial traffic or equipment can cause cracking.
- Bad installation: Thin slabs or poorly compacted base material create weak spots.
- Aging concrete: Older slabs naturally develop fractures over time.
How to Fix Cracked Concrete Slab Issues
If you’re wondering how to fix cracked concrete slab damage, the method depends on the severity:
- Minor cracks may be sealed with epoxy or polyurethane to stop water penetration.
- Uneven slabs benefit from foam injection which restores elevation and fills voids under the concrete.
- Structural movement may require concrete slab piers for added support.
- In rare cases slab replacement is needed when damage is too advanced.
Get ahead of repairs & schedule a consultation with Leveled Concrete!
How to Fix a Cracked Concrete Slab Foundation: 4 Repair Options
Not every crack needs the same fix, and that’s why we have multiple approaches at Leveled Concrete. Here you can learn a little bit about the different concrete repair options.
1. Foam Jacking
Our go-to method for slab repair. Expanding foam is injected beneath the slab, filling voids and lifting sunken sections. Fast cure time, minimal disruption, and long-lasting results.
Learn more about foam jacking ➞
2. Polyurethane Crack Filling
For narrow surface cracks, flexible sealants stop water intrusion and reinforce slab strength.
3. Pier Installation
Steel piers are driven deep into stable soil to support and stabilize slabs with structural movement.
Learn more about concrete push piers ➞
4. Last Resort: Slab Replacement
If the slab is severely damaged, replacement may be required. This is less common but sometimes the only option.
Get an expert opinion & schedule your slab repair estimate now.
Fix Your Cracked Concrete Slab with Leveled Concrete
At Leveled Concrete, we fix cracked concrete slab issues with advanced methods and years of expertise. We handle residential and commercial projects across Houston and surrounding areas. See our service areas here.
Our concrete leveling solutions include: concrete leveling, driveway repair, sidewalk repair, porch/patio repair, pool deck repair, bulkhead/seawall repair, joint/crack sealant, and more.
Call (832) 995-2000 or schedule online today.