Quick Answer: How Thin Can You Pour Concrete Over Concrete?

Can you pour a thin layer of concrete over existing concrete?

There are situations when pouring new concrete isn’t the most suitable option. For instance, surfaces with larger cracks, heaving or settling conditions, or where height cannot be raised, replacement is a better solution. However, in most cases, you can pour a new layer of concrete onto the existing one.

How thick does a concrete overlay have to be?

The minimum recommended thickness is 1 to 2 in. ( 25 to 50 mm ) for a fully bonded concrete overlay placed on a base slab that is practically free of cracks and in which the concrete is sound, clean, and of good quality.

Can you pour concrete over top of concrete?

If the existing concrete is in good shape structurally, you can pour new concrete over it to freshen it up. Worn or cracking concrete makes your outdoor areas look drab, outdated and in need of fresh concrete. If the existing concrete is in good shape structurally, you can pour new concrete over it to freshen it up.

Does concrete stick to concrete?

Concrete Bonding Adhesive permanently bonds existing concrete, plaster and stucco to new concrete, plaster and stucco.

How do you attach concrete to old concrete?

When using a liquid bonding agent, paint the bonder onto the existing concrete and allow it to dry until it is tacky. This usually takes only a few minutes. Then apply the repair material. Just as in the process described above, after the bonder has become tacky apply a scratch coat and then apply the repair material.

Can I pour a 2 inch concrete slab?

If done properly, new concrete can often be poured right over an existing slab. For this to be feasible, the contractor needs to pour at least 2 inches thick, use smaller aggregate, and incorporate reinforcement such as welded wire mesh or fiber mixed into the concrete.

Do concrete overlays last?

Concrete overlays are only as good as the surface, it is being applied to. You need to keep in mind that if the concrete is cracked or surfacing up, then the overlay will also break and come up. You need to be sure that if the concrete is heavily damaged, your overlay won’t last long.

What is the best concrete overlay?

Broom Finish Concrete Overlay SureBroom is our strongest overlay, has the largest aggregate, and is suited for the highest wear surface including vehicular and foot traffic. Trowel or spray applications.

Will concrete overlay crack?

Unfortunately, most concrete has a tendency to crack, usually as a result of improper design or poor construction practices. As an overlay installer, you have no control over these factors. You are responsible for repairing any cracks in the existing concrete before resurfacing.

Why is my concrete cracking?

When concrete expands, it pushes against anything in its way (a brick wall or adjacent slab for example). When neither has the ability to flex, the expanding force can be enough to cause concrete to crack. Expansion joints are used as a point of separation (or isolation), between other static surfaces.

Can you put exposed aggregate over existing concrete?

Can exposed aggregate be applied over existing concrete? It may require some grinding of the existing concrete so it provides a bumpy surface to which the new layer will adhere, and you may be limited as to the aggregate choices so that they adhere to a top layer of concrete.

Will quikrete bond to concrete?

QUIKRETE ® Concrete Bonding Adhesive is specifically formulated for permanently bonding new concrete or plaster to old concrete or plaster. It is suitable for interior or exterior applications. QUIKRETE ® Concrete Bonding Adhesive is also used as the required primer for QUIKRETE ® Self- Leveling Floor Resurfacer.