Bill and his helper, Bob, arrived to our home at the appointed time. They put down a quilt to protect the flooring adjacent to the project. We contracted Bill to install retro stair treads and risers over low end pine stairs. They worked efficiently and carefully. They measured each tread and riser separately and cut them to size outside. The completed stairs are beautiful and my wife and I are very pleased. The entire project took 4.5 hours. They cleaned up thoroughly before they left.