Can You Pour Concrete Over Slabs

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Can you pour concrete over slabs.

Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan. No matter how hard concrete gets or how strong it is there is nothing that can stick it to the older surface. How to pour a concrete slab. A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years.

Pouring concrete over an existing concrete driveway or sidewalk. Adding fresh concrete is a common way to level out old slabs and patch damage. When wouldn t i want to pour new concrete over old concrete. Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan.

Imperfections form when concrete hardens or sinks into the ground. The condition of the existing slab is the primary factor that determines how long the new concrete will last. The same principles as above apply to pouring concrete over an existing concrete driveway or sidewalk. So if you pour new concrete over the old surface without preparing the one beneath it will crumble within no time and will lead to another big headache.

Ok so the first thing you should know when considering a job like this is that any slab that you pour over an existing one will have problems with separation. They have talked with a contractor and the small 12 x 18 area has been quoted at 2 700 for approximately 2 to 4 inches of concrete. The condition of the existing slab is the primary factor that determines how long the new concrete will last. To save time and money many states and municipalities use a road repair technique known as whitetopping the process of pouring concrete over asphalt rather than removing the existing asphalt.

Before you get started contact your local building department to see whether a permit is required and how close to the lot lines you can build. 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. Homeowners can benefit from this whitetopping technique to reduce labor costs and time when replacing worn asphalt driveways. Then drive four stakes to roughly indicate the corners of the new slab.

That kind of equipment can really punish a concrete floor. You can if the concrete is sound solid with minor cracks pitting scaling surface damage or just plain ugly.