Looking for ideas on levelling a concrete floor in an old dairy readying it for fitout as living quarters. The floor is approximately 20mx6.6m with one half relatively even, but the other half ~10mx6.6m slopes away from the centreline to be aprroximately 100mm lower than the middle. I had thought that the only way to do this was to concrete to a minimum of 50mm above the highest point on the floor but anyone have other ideas?