Wet room and walk-in shower installation in London
From the outside a wet room looks deceptively simple — no tray, no enclosure, just a floor that happens to drain. Everything that actually matters is hidden underneath: tanking membrane taken up the walls, a floor formed with a proper fall to the drain, and a gully big enough for the water hitting it. Skip any of that and the leak does not show up in the room itself — it shows up two floors down, well after the tiler has packed up and left.
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What this includes
- Full wet room conversions, tanked and floor-formed
- Walk-in and level-access showers without a full wet room
- Falls formed correctly to the drain, not guessed at by eye
- Tanking taken up walls and around penetrations
- Linear and point drains, sized for the shower’s flow
- Accessible and wheelchair-accessible wet rooms
Worth knowing first
A little of this might mean you do not need to call us at all — we would still rather you knew it.
The waterproofing is the job, the tiling is finishing
Tanking membrane, taken properly up the walls and sealed around every pipe penetration, is what actually stops water getting into the floor and the flat below. Tiling on top of poor tanking still leaks — it just takes longer to show.
A wet room needs a joist depth check first, in a flat especially
Forming a fall to the drain usually means dropping the floor level, which needs depth in the joists or slab to do properly. In a top-floor flat with limited build-up, that is the first thing worth checking, not the last.
Flats need the freeholder involved
Changing the floor build-up and drainage of a flat for a wet room often needs sign-off from the freeholder, and can affect the ceiling void of the flat below too. Ninja Plumbers raises this with you before the floor is opened up, not once it already has been.
A walk-in shower is not automatically a wet room
A walk-in shower with a tray and glass panel gets most of the look without lowering the floor, and is a smaller job. A full wet room is the right answer for genuine level access; a walk-in tray is often the right answer for everyone else.
What affects the price
Most of what you pay for in a wet room ends up out of sight once the tiles are down. How much depends on the floor you are starting from, how much of the room gets waterproofed and the finish you choose.
Timber floor or concrete
On a timber floor the joists may need strengthening and a new rigid deck laid before a former can be set in for the fall. On a concrete slab, a channel is cut for the drain and the fall is built up in screed.
Whole room or shower area
A full wet room is waterproofed across the entire floor and up the walls. A walk-in shower on a low-profile tray only needs the shower zone tanked, with a glass panel, which is less material and fewer days on site.
Getting the waste away
The drain has to reach the soil stack with enough fall. If the waste can run between the joists in the same direction, that is straightforward. Running it across joists, or a long way to the stack, can mean lifting more floor or boxing in the ceiling below.
The tiles and fittings you choose
Small mosaic tiles follow a fall easily. Large-format floor tiles need the floor formed in precise planes, with careful cuts towards the drain. Grab rails, a fold-down seat or a heavy glass screen also need solid fixings built into the walls beforehand.
The price is agreed before any work starts. We take card and cash.
Common questions
Do I need planning permission or building control sign-off?
Not planning permission for a like-for-like bathroom. Building regulations do apply to the waterproofing and drainage, and we work to them as standard.
Can a wet room go in a flat, not just a house?
Yes, though floor depth and the freeholder’s consent are worth checking early — both can affect what is possible before you commit to a design.
How long does a full wet room take?
Somewhere between one and two weeks as a rule, depending on how much floor forming and finishing is needed. It runs longer than a standard bathroom refit because the tanking needs proper drying time between stages, and rushing that is exactly how you get a leak later.
Will it smell or let damp through eventually?
Not if the tanking and falls are done properly and given time to cure before tiling. Rushed drying time is the most common cause of an eventual failure, not the wet room concept itself.
Will the rest of the bathroom floor get wet?
Some of it, yes. In a full wet room the whole floor is waterproofed and falls to the drain, so splashes are expected and dry out quickly. A fixed glass screen keeps most of the spray in the shower area. What matters in a small room is where the toilet, basin and towel rail sit in relation to the shower head, so settle the layout with that in mind.
Is a wet room hard to keep clean?
Easier than a tray and enclosure in some ways, since there are no tray edges or enclosure seals to go mouldy. The things that need attention are the grout lines on the floor, which pick up limescale quickly in London’s hard water, and the drain’s hair trap, which should be lifted out and cleared every week or two. A squeegee after each shower does more than any cleaning product.
More bathroom work we take on
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Bathroom Installation
A single fixture swap through to a full strip-out and refit, priced up front.
More on Bathroom Installation -
Shower Installation
Mixer, thermostatic and digital showers fitted — matched to the water system you actually have.
More on Shower Installation -
Shower Repair
Weak flow, wandering temperature, no hot water or a leak — diagnosed and repaired, usually without a new shower.
More on Shower Repair -
Bath Installation
One bath out, another one in — or the bath out and a shower in its place.
More on Bath Installation -
Toilet Installation
A new toilet fitted, an old one swapped, or a WC moved to somewhere it has never been.
More on Toilet Installation
Need wet rooms & walk-in showers in London?
Describe the problem and give us your area, and we’ll tell you the price before anyone starts work.