Concrete Cracked and Not level
I have a concrete slab that I want to put a Flagstone Patio on top of it. I have noticed that the concrete has a large crack in the middle that was caused when a portion of the concrete settled. Now, the settled part slants towards the house. Can I just add concrete to the current concrete to give the slab the desired slant? Will creating different thicknesses in the concrete cause problems with the hardening of the concrete? Thanks.