Concrete Over Concrete Floor

The condition of the existing slab is the primary factor that determines how long the new concrete will last. It can be painted on or applied with a rag. The old concrete needs to be completely clean or else anything you pour over it won t bond to it.

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Push the debris off the concrete surface or collect it in a bag to throw away.

Concrete over concrete floor. When we pour concrete floors over existing concrete floors and the new floor is less than 3 inches thick we use a product called weld crete to bond the two floors together. If the existing concrete except for the finish is in good shape structurally you can cap the existing concrete with 2 of 4000 psi concrete. Pouringconcreteoverconcrete bondconcretetoconcrete mikedayconcretein this video i m pouring a new concrete floor over an existing concrete floor if you wa. Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan.

If the existing concrete is less than 4 thick cracking and breaking up you might be better off replacing it with a new concrete floor. Continue pouring the concrete until you reach the height of the chalk line or the top of the form boards. A commercial bonding agent helps with that. It rolls or brushes on like paint very easy to install creates a bond between the old new concrete floors.

Step 6 settle the concrete with a clean straight edge long enough to drag across the surface. Even though concrete is strong and forms a hard structure there s nothing in it that helps it stick to old concrete. Pour the concrete over the old floor and spread it over the surface with a rake. The key to successfully pouring concrete over an existing concrete surface is to ensure the two layers bond properly.

Pouring concrete over an existing concrete slab how to bond them together they always say rome was not built in one day and this was the place that changed the looks of architectural structures that we see today. The first order of business is to remove gravel leaves sand and dirt. A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years. We cap old rough concrete floors all the time.

Get as much of it off the concrete as you can.