A slab and a pad are basically the same, with the exception of what is going on top. A pad will usually allow for garbage cans or small sheds. where as a slab can handle bigger structures such as garages, large sheds, or complete room additions. Both are done with either trench foundations or pilon holes, which ever the village code calls for. Contact 3D for a free quote and consultation, and we will work with you to provide the best service possible.