Concrete Pour Over Existing Slab Forum

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.

Concrete pour over existing slab forum.

How to pour concrete over existing concrete. In the video below i poured a new stamped concrete patio slab right over the old existing concrete. This includes removing sand dead leaves and gravel. However proper prep work is needed.

The old concrete was over 20 years old. A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years. It was originally poured in multiple sections so it had some seams that looked like cracks. Cleaning old concrete surface.

When wouldn t i want to pour new concrete over old concrete. And i wish to increase the size to 2 4 x 2 4 mtrs it will not have any thing heavy on it but will have to deal with water and heat from the sauna. Use a 6x6 10x10 welded reinforcing wire in the new concrete to help prevent. Pouringconcreteoverconcrete bondconcretetoconcrete mikedayconcrete in this video i m pouring a new concrete floor over an existing concrete floor.

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. Steps involved in pouring concrete over existing concrete slab step 1. 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.

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. Being the old slab is in pretty good condition you can pour directly over the old slab with 4 5 of new concrete. Sweeping dirt s debris over the existing concrete slab will allow bonding to take place.