Quick answer
A wet room usually takes 4–7 working days to install. It’s often a touch quicker than a full traditional bathroom because there’s no bath to plumb and box in and fewer fittings overall — but the timeline is driven by the tanking. The whole floor and lower walls are fully waterproofed, and that membrane has to cure properly before any tiling goes over it.
The stages of a wet room install
A wet room is a different beast to a panelled bathroom. Instead of dropping a tray into place, the entire floor becomes the shower, falling gently to a drain, with a continuous waterproof skin underneath every tile. That’s where the time goes. Here’s how a typical 4–7 day install unfolds in a Plymouth home.
Day 1 · Strip-out & survey
We sheet up the route in, take the old bathroom back to the joists and substrate, and check the floor for movement, rot or old damp. A wet room is unforgiving of a bouncy floor, so this is where we confirm what bracing or boarding the room needs.
Days 1–2 · Former & first fix
The pre-formed sloping tray (the former) is set into the floor to create the fall to the drain, and the waste is plumbed in. New feeds for the shower, basin and toilet go in while the walls are open, along with any underfloor heating and extractor wiring.
Days 2–3 · Tanking
The make-or-break stage. The floor, the former and the lower walls are coated in a waterproof tanking membrane, with extra reinforcement at every corner, pipe and drain. This must cure before anything goes over it — and no, it can’t be hurried with a heater.
Days 3–5 · Tiling
Floor and wall tiles are set out, cut around the drain and fixed, then left to cure before grouting. Cutting tiles into a fall around a central or linear drain is fiddly, precise work — it’s a big part of why a wet room looks seamless when it’s done right.
Days 5–6 · Second fix
Shower valve and head, screen (if you’re having one), basin, toilet, towel rail and lighting all go in, get connected and are tested. We run it hot and cold and check the fall actually carries water to the drain as it should.
Days 6–7 · Seal, finish & clean
Silicone, trims, decorating and accessories, then a proper clean-down and a walk-round with you. We explain how to look after the grout and seals, and you get your handover. See what a full wet room installation includes.
Why tanking sets the pace
People often assume a wet room is quick because it looks simple — just a tiled floor and a drain. In reality, the simplicity is the hard part. With no tray and no shower enclosure to contain the water, the waterproofing is the bathroom. Get it right and the room is bone dry below the tiles for decades. Get it wrong, or rush the cure, and you’ve got water tracking into the floor void and ceiling below.
That’s why we won’t compress the tanking stage to win a day. The membrane needs its proper curing time, and so does the tile adhesive over it. Most of a wet room timeline is actually waiting — and that waiting is what you’re paying a proper fitter to respect.
The waterproof tanking membrane must cure before tiling — the single biggest factor in how long a wet room takes.
What makes a wet room quicker or slower
Two wet rooms the same size can land days apart depending on the room and the spec. We’ll flag any of these honestly in your quote rather than discover them mid-job.
Quicker
- A solid, level concrete floor that needs no bracing
- Keeping the drain near the existing waste run
- Standard-format tiles and a single colour
- All materials on site before day one
Slower
- A bouncy timber floor needing reinforcement
- A long new waste run to reach a soil stack
- Underfloor heating under the tiles
- Large-format, mosaic or natural-stone tiling
If you’re comparing options on time and budget, our Plymouth bathroom cost guide sets out the figures, and our walk-in shower page covers a lower-disruption alternative if a full wet room isn’t quite what you need.
Common questions on wet room timing
Is a wet room quicker than a normal bathroom?
Usually, yes — typically 4–7 working days against 7–10 for a full bathroom. There’s no bath to plumb and box in and fewer fittings, but the saving is partly offset by the tanking stage, which a panelled bathroom doesn’t need.
Can the tanking be rushed to save a day?
No, and we won’t try. The waterproof membrane and the tile adhesive over it both need their proper curing time. Forcing it is the single most common cause of a wet room leaking later, so it’s a stage we never shortcut.
Will I be without a toilet for the whole week?
Only in that room, and only for a few days mid-job — roughly from strip-out to second fix. If it’s your only bathroom we’ll tell you exactly which days that falls on so you can plan around it. See more on living through the work in our FAQs.
Ready when you are
Get a fixed quote with a real wet room timeline
Tell us about your room and we’ll give you a written price and a day-by-day plan — so you know exactly how long your wet room will take before we lift a tool.