Concrete Pour Over Existing Slab Forum

Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan.

Concrete pour over existing slab forum.

Cleaning old concrete surface. In the video below i poured a new stamped concrete patio slab right over the old existing concrete. Pouringconcreteoverconcrete bondconcretetoconcrete mikedayconcrete in this video i m pouring a new concrete floor over an existing concrete floor. Here s the catch if the existing surface is somewhat in a structurally sound shape and elevating its height to a few inches won t be a problem you can certainly freshen it up with a new layer of concrete.

I want to increase the size of the concrete slab floor from my old shed for my new sauna the existing floor slab is aprox 2 4 x 1 8mtrs. How to pour concrete over existing concrete. Being the old slab is in pretty good condition you can pour directly over the old slab with 4 5 of new concrete. Steps involved in pouring concrete over existing concrete slab step 1.

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 old concrete was over 20 years old. Pouring concrete over the existing one. 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. This includes removing sand dead leaves and gravel. Use a 6x6 10x10 welded reinforcing wire in the new concrete to help prevent. It was originally poured in multiple sections so it had some seams that looked like cracks.

One of the best tools that can be clean all the debris out of crack is a stiff bristle broom. However proper prep work is needed. A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years.