A bathroom is built in layers. Each step builds on the previous one, and once something is behind the tiles, it's hard to get to. That's why the order matters so much.
Before you start: the plan
First decide where everything goes: toilet, shower, vanity and radiator. Keep in mind that the toilet and shower need a drain with a fall. If everything stays in the same place, you save a lot of plumbing. Choose your tiles and fixtures early too, as delivery can take weeks.
Step 1: demolition
Old tiles, fixtures and possibly the old screed come out. Debris is removed straight away. Was the house built before 1994? Then an asbestos survey must be done before demolition, because old sealant or flooring can contain asbestos.
Step 2: plumbing
With the walls open, the new pipes for hot and cold water and the drains go in. A concealed cistern for the wall-hung toilet is fitted. The shower drain is set at the right fall, so water runs away by itself.
Step 3: walls and waterproofing
Lining walls of moisture-resistant drywall hide the pipes and straighten the walls. Then comes the most important invisible part: the waterproof layer. Sealing tape goes in the corners, and a waterproof coating on walls and floor, following the manufacturer's instructions.
Step 4: tiling
Floor first, or walls first? That depends on the system, but what matters most is a good tile plan: where the first tile starts and where the cuts go. With large-format tiles we use a levelling system, so there's no lippage.
Step 5: fixtures
Only once the grout is dry are the toilet, vanity, shower screen and radiator fitted. Then every connection is checked for leaks.
Step 6: sealing and handover
Silicone sealant along the bath, shower and floor, lighting connected, and everything handed over clean. Let the sealant cure for at least a day before your first shower.
How long does it take?
For an average bathroom of around 5 m², allow two to three weeks. Drying times of the waterproof layer and the tile adhesive largely set the pace. Rushing here is a bad idea.
The three biggest pitfalls
- No waterproof layer under the tiles. Grout isn't waterproof, and moisture always finds a way.
- Too little fall towards the shower drain, so water is left standing.
- Ordering fixtures too late, leaving the bathroom half finished for weeks.
Want to see what this looks like layer by layer? View the bathroom in 3D, or calculate the labour cost in the price calculator.
