Bathroom Renovations: What Goes On Behind the Tiles

Two bathrooms can look identical on the day they are finished and be completely different five years later. The difference is behind the tile: how the shower was waterproofed, how the floor was sloped, how the room breathes. Here is what should be happening before the tiling starts.

1. A Continuous Waterproof Layer

   Membranes on the shower floor and walls, sealed at every corner, joint and pipe penetration. Tile and grout are not waterproof on their own. The membrane is what keeps water out of the structure.

2. Slopes That Send Water To The Drain

   The shower base has to fall evenly to the drain, with no flat spots that hold water. It is a small detail that decides whether you end up with staining and mould along the grout lines.

3. Plumbing Set Out Before The Walls Close

   Valve heights, the shower head, the vanity rough-ins and any wall-hung toilet all get positioned first. Moving them after tiling means cutting into finished work.

4. Real Ventilation

   A quiet, properly sized fan ducted outside - not into the attic - clears steam quickly and protects paint, drywall and the joinery. Put it on a timer and it does the job on its own.

5. Tile Set Out With Intent

   Full tiles in the places people look, cuts pushed to the edges, layout planned around niches and fixtures. Careful set-out is what makes a small bathroom feel finished.

Finishes are what you choose, but waterproofing is what you live with. Spend the time on what sits behind the tile and the bathroom stays exactly the way it looked on handover day.