The same principles as above apply to pouring concrete over an existing concrete driveway or sidewalk.
Pouring concrete over existing concrete driveway.
Pouring concrete over the existing one.
If you decide to use a portland cement latex modified or epoxy modified concrete overlay carefully follow the.
You need to consider the added height and weight of the overlay on the existing structure.
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.
Overlays may include polymers portland cement concrete or epoxies.
Yes you may pour a concrete pad overlay over an existing slab.
Over the course of my 20 year contracting career i ve poured countless 2 inch caps over existing concrete with no problems.
Steps involved in pouring concrete over existing concrete slab step 1.
Cleaning old concrete surface.
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.
You can if the concrete is sound solid with minor cracks pitting scaling surface damage or just plain ugly.
How to pour concrete over existing concrete slab step by step process how to pour concrete over existing concrete slab how to pour concrete over existing con.
Pouring concrete over an existing concrete driveway or sidewalk.
Pouring concrete over old concrete instead of directly over a new gravel foundation limits your ability to maximize the slab s lifespan.
Make sure you have enough concrete to fill the entire area to the depth you desire.
Concrete is poured with expansion joints that allow room for the pavement to expand in hot weather.
However proper prep work is needed.
Sweeping dirt s debris over the existing concrete slab will allow bonding to take place.
Asphalt driveways that are paved over an appropriately compacted subbase will always be superior to asphalt that is laid over an unstable base or concrete that is prone to shifting and expansion.
The new concrete certainly isn t going to float up in the air or slide off.
A well poured concrete slab with a deep sturdy foundation can last for 30 to 40 years.
Skeptics fail to recognize that pouring over the top of sound concrete is no different than pouring over a super compacted stone base.
Add all of the concrete right away so none of the mixture has a chance to dry out.
Apply the new concrete over the primer.
One of the best tools that can be clean all the debris out of crack is a stiff bristle broom.