I recently discovered that both of our wetrooms have been poorly installed. These were new rooms put into a new extension on an old house by a developer. The work is about 18-months/2 years old and we've been in for about 6 months (we're the first occupants). I think we're going to have to get them redone with proper tanking that the previous builders appear to have left out. The bathrooms are tiled all over with fairly large (600 x 300mm?) travertine tiles, we'd like to keep as many of these as possible since (i) we like them, (ii) they're expensive and (iii) they seem to be adequately installed in the non-wet areas e.g., round the bath. The shower floors are mosaic which we'll replace, we'll try to keep the fittings
1: Is it possible and cost-effective to remove the travertine tiles and reuse them over the new tanking. If so, how can they be removes intact?
2: Does the developer or his builders have any liability for the poor quality of this work? The serious leaks make the showers unuseable after very little use.
3: Can anyone recommend a wetroom installer in central London?
4: Cash is fairly tight, would it reduce costs much to have me do some of the groundwork (removing existing fittings, replacing plasterboard/aquaboard). Is there anything that you would particularly recommend that an amateur like me does or doesn't handle?