Step 5 pour the concrete over the old floor and spread it over the surface with a rake.
Pour concrete on existing concrete floor.
In a concrete mixer add cement aggregate sand and water as directed on the concrete package instructions.
The measurements acquired can then be used to estimate the amount of concrete required.
Depending upon the requirement of the preferred use of the slab and the loads coming upon the slab.
Sweep your existing floor clean from dirt and debris.
Spread the new concrete over the surface filling the entire area within the form you created.
If you are laying pouring concrete over existing concrete there needs to be a bond.
When i say bond the concrete you are lying on top off needs to be a rough finish like scabbled.
You can if the concrete is sound solid with minor cracks pitting scaling surface damage or just plain ugly.
Prepare enough concrete to pour a 1 to 2 inch layer over the old floor.
Pour a floating concrete floor.
Let s assume that you re pouring over an existing cement floor and that there will be no height issues by your doors.
The cleaner it is the better bond you will achieve with the new concrete.
You could drill holes into the existing concrete surface and insert steel pins and then the mesh on top.
The thickness of the slab is designed.
Pouring concrete over existing concrete sidewalk when pouring new mix over old concrete make the mixture stiffer than usual by adding less water.
So here is a basic process for pouring your concrete floor.
Over the years it had cracked.
Smooth the surface using a two by four or float then add texture as desired using tools or a broom.
We had a building that had an existing concrete floor that was poured directly on the ground.
Clean your existing floor.
When laying new concrete over an existing slab it s important to separate the two layers.
However the building supports were placed directly on to.
If the slabs bond together any cracks or damage in the old surface will spread to the new surface.
Pouring concrete over an existing concrete driveway or sidewalk the same principles as above apply to pouring concrete over an existing concrete driveway or sidewalk.
Measure the perimeter of the area to pour the concrete over the existing slab.