A. A terrazzo grinder can grind the existing concrete smooth, if that is the finish desired. But this may be an expensive option if you will be covering the concrete with another finish material. Companies that specialize in terrazzo floors charge by the square foot, expecting this to be the finished floor.

If you don’t mind increasing the floor elevation, the slab can be leveled with one of the many gypsum-based leveling mixtures, such as Gypcrete. There are also a number of epoxy concrete fillers available from industrial maintenance supply houses that might work. But these are made to create a super strong surface that can withstand heavy traffic from trucks or fork lifts, and are very expensive.