Can You Pour Concrete Over Old Concrete Driveway

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.

Can you pour concrete over old concrete driveway.

Old concrete makes a very good sub base if it s not settling or heaving everything about concrete. A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years. Install the form usually wood form around the perimeter of old concrete surface. The condition of the existing slab is the primary factor that determines how long the new concrete will last.

The form shall extend above existing concrete surface based on the designated thickness of the new concrete. You need to consider the added height and weight of the overlay on the existing structure. Can you 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.

Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan. How you determine that could be the most important part to answering that question. Why don t you pressure wash the driveway to remove all of the loose stuff then coat it with an epoxy based concrete resurfacing compound. Is the existing concrete structurally sound.

Overlays may include polymers portland cement concrete or epoxies. Yes you may pour a concrete pad overlay over an existing slab. Pouring over old concrete need similar basic formworks that employed with fresh pours. But there s some things you have to take into consideration before you make a final decision.

Put on safety glasses and use a hammer and chisel to chip out oil stains or tree sap. Make sure that the height of the formwork is even. Yes you can pour concrete over concrete if the existing concrete is structurally sound. The simple answer is yes you can pour new concrete right over existing concrete.

So fyi can you pour new concrete on top of old yes but it will not solve your problem and look nearly the same as the old concrete in a short period of time. By the way it will take you much longer to break up two layers of poured concrete in the future cost you more if someone else does it and the work put in the second slab will be a total waste. A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years. Before pouring concrete over existing concrete driveway or sidewalk surfaces remove stains and loose material so the new concrete can stick properly.

Oil dirt and other debris can affect how the new concrete bonds with the old.