Get matched with top concrete resurfacing pros in Hamilton, MS

No, wet concrete will not bond to dry concrete without an additional bonding agent. The common alternative is adding a sand or gravel layer under a concrete slab to enhance bonding and create a stable foundation. The right choice depends on the height and thickness of your two slabs, local laws, and the use of the specific concrete slab.

No, hairline cracks in concrete are generally not a problem as they do not impact the strength and longevity of the concrete. Generally, cracks less than 0.3 millimeter wide don’t impact the structure. Hairline cracks can grow over time and weaken the structure, such as in a home foundation. Some hairline cracks can also cause leaks in a foundation. It’s important to watch the cracks to see if they grow. Contact a concrete contractor if you notice cracks exceeding 0.3 millimeter wide.

The repair method for a damaged concrete patio depends on the type of damage. For surface cracks, a concrete crack filler is a quick and simple fix. For larger cracks or uneven slabs, you may need to hire a professional to pump a cementitious material under the sunken portion to lift it back into place. For heavy spalling and other surface damage, resurfacing may be the best and most affordable option. This includes pouring a new layer of concrete over the old layer.

Concrete shrinkage cracks are very common and should be expected. Even professionals end up with shrinkage cracks on newly poured concrete slabs. Remember that these cracks are not harmful to the slab's strength, though some homeowners do prefer to fill in the cracks for aesthetics. When installing concrete, you can avoid ample concrete shrinkage cracks by avoiding hot, sunny, or windy days.