Can New Concrete Be Poured On Old Concrete

The condition of the existing slab is the primary factor that determines how long the new concrete will last.

Can new concrete be poured on old concrete.

The condition of the existing slab is the primary factor that determines how long the new concrete will last. There s some things you have to take into consideration before you make your final decision though. Maybe and maybe not. If you plan on pouring a lot of concrete build a wood and mesh barrier first to ensure your new slab is strong.

Spread the new concrete over the surface filling the entire area within the form you created. 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. When i say bond the concrete you are lying on top off needs to be a rough finish like scabbled. If the foundation beneath the slab is not sound the new concrete could sink or develop deep potholes.

The honest truth about this concrete patio make over. You could drill holes into the existing concrete surface and insert steel pins and then the mesh on top. Yes if done correctly you can pour new concrete right over existing concrete. When the temperatures drop new concrete should be covered with concrete insulating blankets or in a pinch old household.

Concrete surface suffers from wearing and damages over time disregard of its strength. Adding fresh concrete is a common way to level out old slabs and patch damage. If you expect to pour concrete and use it in a couple days you can t. When pouring new mix over old concrete make the mixture stiffer than usual by adding less water.

Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan. 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. If done properly new concrete can often be poured right over an existing slab. If you are laying pouring concrete over existing concrete there needs to be a bond.

No matter how strong a slab of concrete seems it will wear out over time. Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan. 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.

So you may ask if pouring new concrete over the old one is a better option. Smooth the surface using a two by four or float then add texture as desired using tools or a broom.