Can you pour concrete over existing concrete?

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You can put new concrete over old concrete. However, unresolved issues with your old concrete, such as cracks or frost heaves, will carry over to your new concrete if not taken care of. In addition, you must pour it at least 2 inches thick.

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Just so, can you pour a new concrete slab over an existing slab?

1. Raises the Level. Pouring a new layer of concrete over an existing walkway, patio or porch will raise the level by several inches. If the slab runs up to a door, the raised surface may not provide the necessary clearance for the door to open.

Likewise, can you slab over slabs? You could break the slabs with a sledge hammer to further compact if you feel subsidence is a problem and then cast a solid, steel reinforced concrete pad over the whole area, building off this if the finished levels allow this raise in height.

Herein, how do you lay concrete on top of concrete?

How thick does a concrete overlay have to be?

The recommended thickness of a concrete overlay should be between 1 and 2 inches. Some people will even go to ΒΌ of an inch in thickness, which is still sufficient depending on your needs. If you place a 2-inch overlay, you need a very rough surface on the existing slab. Ensure the surface is rough enough.

1 Related Question Answers Found

Will concrete overlay crack?

But even if you do everything right in preparing the slab before you apply the overlay, you may still get cracks. You may experience shrinkage cracks, often the result of applying the overlay topping incorrectly or too thick.

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