Can New Concrete Be Poured Over Old Concrete

A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years.

Can new concrete be poured over old concrete.

However this approach is not suitable option unless the existing concrete is in good shape structurally. Placement of new concrete over old concrete shall be conducted according to a pre planned procedure in order to achieve desired final product. On the contrary if your existing concrete is stable and elevating a few inches of its height won t hinder anything in the way then you can certainly get new concrete poured over the old one. But make sure to leave this to professionals since you don t directly pour the layer of concrete.

So you may ask if pouring new concrete over the old one is a better option. We d say no since concrete doesn t have any bonding agents of its own to grip onto the new layer but it s a yes if you get a layer in between the two and help the top layer adhere to the surface beneath. 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. Although it makes the concrete stronger it won t prevent it from cracking.

If the foundation beneath the slab is not sound the new concrete could sink or develop deep potholes. When pouring new mix over old concrete make the mixture stiffer than usual by adding less water. The new concrete you pour binds to the mesh. Press it down so it is flat and level before you add the new concrete.

The honest truth about this concrete patio make over. You can purchase a roll of welded wire mesh at a home improvement store then simply spread it out in a single layer over the old concrete. Steel rebar is also a good idea if the slab is thick enough to allow it. Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan.

New concrete is commonly poured over old concrete which may have been damaged for any reason for repairing purpose. Spread the new concrete over the surface filling the entire area within the form you created. Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan. There are cases when pouring new concrete over old just isn t a viable solution.

When wouldn t i want to pour new concrete over old concrete. The condition of the existing slab is the primary factor that determines how long the new concrete will last. If you re concrete has large cracks and the slab may still be moving due to freeze and thaw conditions or settling then a tear out and replace is a better solution. The condition of the existing slab is the primary factor that determines how long the new concrete will last.

If done properly new concrete can often be poured right over an existing slab. Concrete surface suffers from wearing and damages over time disregard of its strength.