Yes, always. Tile and grout are not waterproof on their own. Wet areas are tanked before tiling, and we will not skip it.
Sometimes, if the existing tiles are sound, flat and well bonded. More often removing them gives a better and longer-lasting result, and we will tell you which applies.
Usually around 48 hours after grouting and sealing, to let everything cure fully. We will confirm on the day.
Yes. Natural stone is sealed on completion and we will tell you how often it needs resealing.
It comes down to whether anything is moving. If the shower, bath, vanity and their positions are all staying and the tiled surface is the problem, it is a tiling job and can be planned around the tiling alone. If the room itself is changing, the tiling is one stage in a sequence and the decisions that matter most — drainage, the concealed work, the order the room is built in — happen before it, so the project belongs with bathroom remodeling. We carry out the tiling either way; what changes is what the job is planned around.
Setting out is deciding where the first tile goes, which then determines where every cut falls. Rooms are almost never a whole number of tiles wide, so there will be cuts; the aim is to put them where they are least noticed and to keep them balanced rather than leaving a narrow sliver along one prominent edge. Reference points usually come from what the eye follows — a niche, a window reveal, the center of a bath or the run above a countertop. We dry-lay before fixing anything, because that is when a problem is cheap to solve.
Because level and flat are different things. Level describes whether a floor slopes; flat describes whether it rises and falls across its surface. A floor can be perfectly level and still have humps and hollows in it. Tile is rigid and cannot follow that: it bridges a hollow with nothing underneath it, and over a hump one tile edge sits proud of its neighbour, which you feel underfoot and see whenever light crosses the floor. Larger tiles absorb less of that variation than small ones, so the same floor can be fine for one tile and not for another.
It gets decided in advance, because tile and the covering beside it are rarely the same thickness. Two things need agreeing: where the change happens, which is usually under a closed door rather than out in open floor where it would be seen from both rooms, and how any difference in height is taken up. Left until both floors are down it becomes an awkward compromise, so we raise it while the setting out is being agreed.
No, and it is worth being clear about that. Grout fills the joints between tiles and finishes the surface; it is not a waterproof layer. In a wet area, keeping water out of what is behind the tile is the job of the tanking applied before any tile goes on, and it is why we do not skip it. Joints and sealant also need looking after over time rather than being maintenance-free, and tiling will not resolve an existing leak — that has to be found and fixed first, or it will simply reappear behind new work.