Hired these guys to build a staircase on our house. They built it with no foundation. Looked good when done, but one winter later and the entire thing is falling apart. I asked about a foundation and the reply was that the last staircase lasted 75 years, so this one should as well. The railing company had trouble installing a railing afterwards since there was "nothing under the stone". A little water frozen and thawed over winter and we have to redo the entire thing.