Limestone, Travertine, Terrazzo and Marble Cleaning, Polishing & Restoration in London Buy The Finest Sealants online Buy Sealants online!!!! CLICK HERE or call to discuss your requirement 01707 661190 External Staircase repair is becoming a large part of our work. We did some small renovations to a certain Mr Blair's residence back in 2002 and since then we have been repairing, restoring and replacing some fabulous marble staircases in and around London. Whether they are Marble, Granite, Limestone, Portland, Bath, Terrazzo, Concrete or Sandstone, we can repair and restore them to your satisfaction - GUARANTEED.