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Slab Cracks: Causes & Solutions

Why do concrete slabs crack and how do you repair them?

Don’t get us wrong. Concrete is typically a long-lasting solution as a building material. When installed correctly it can last a very long time. The problem is here is that have to add a “BUT” statement. Concrete is long-lasting but it can and will crack. It’s just a matter of time. Driveways, sidewalks, porches…all concrete slabs will have slab cracks at some point. Understanding what causes them can help. Understanding when you need to repair them is important as well.

Causes of Slab Cracks

slab cracks - cracked and sunken drivewaySome slab cracks can occur right after the concrete is poured. This occurs when it is hot and there is low humidity. If the concrete isn’t cured property it can crack quickly after it is poured. Make sure to hire a reputable company to pour your concrete. Ask them what their curing process is. Keeping the surface moist so that it doesn’t dry at a faster rate than the bottom of the concrete can help prevent those initial cracks.

Settlement occurs in concrete slabs when there are voids under the concrete or when the concrete moves. If the soil beneath the concrete is poorly compacted or if there is soil erosion you might see this problem.

Tree roots can cause heaving and cracking of driveways and sidewalks. Also worth noting is that trees and bushes can take the water out of the soil around concrete and cause soil shrinkage which can also cause settlement of your concrete slab.

Too much watch can cause washout of soils around and beneath your concrete slab and cause slab cracks as well.

So what can you do about slab cracks?

As a homeowner or business owner, you can be part of the solution by properly maintaining downspouts and gutters around your home. Don’t plant trees and bushes too close to your concrete slab.

For a more permanent solution for slab cracks, contact our team at Airlift Concrete Experts. We can help by checking for voids under concrete and filling them with polyurethane foam for concrete leveling can help prevent settlement and additional cracking. We can also use polyurethane foam for soil stabilization. To learn more contact us today.