A bathroom floor has to manage three risks at once: water reaching the subfloor, slipping when wet, and being cold underfoot. Only a few products handle all three well, and the fitting detail matters as much as the product choice.
Sheet vinyl: the safest specification
Cushioned sheet vinyl is the most watertight bathroom floor you can fit. In a typical bathroom it goes down as a single sheet with no joints, bonded to the subfloor, with the perimeter sealed. Where a seam is needed it can be welded into a continuous surface.
It is also warm underfoot, quiet, soft if someone falls, and available in safety grades with a genuine wet slip-resistance rating. Modern designs are far better than the reputation the material carries — wood, stone and concrete effects that look convincing in a domestic bathroom.
Cost is £28–£48 per square metre supplied and fitted, which makes a typical bathroom a few hundred pounds. Its limitations are that heavy fittings can indent it and a tear cannot be invisibly repaired.
LVT: the best-looking practical option
Glue-down LVT gives a much more convincing tile or wood look than vinyl sheet, is fully bonded so water cannot travel underneath, and is repairable plank by plank. In a bathroom it needs a properly sealed perimeter and sealed pipe penetrations to be watertight.
Choose a textured or embossed finish rather than a smooth gloss. Wet feet on a smooth LVT is genuinely slippery, and the texture costs nothing extra. Some LVT ranges are available with an R10 or R11 slip rating, which is worth specifying in a family bathroom or a bathroom used by anyone unsteady.
Do not use click LVT or SPC in a bathroom. The planks are waterproof but the joints are not, and water reaching the subfloor under an impermeable floor is exactly the failure you are trying to prevent. Expect £45–£75 per square metre fitted.
Tile: durable but cold and slippery
Porcelain tile is completely impervious and lasts indefinitely, which is why it dominates bathroom design. Its two real problems are temperature and slip. Tile is cold enough underfoot that most bathrooms with tiled floors end up with a bath mat permanently down, and polished tile when wet is one of the most slippery surfaces in a house.
Both are solvable. Underfloor heating deals with the cold entirely and a bathroom is the cheapest room in the house to fit it in. A tile with an R11 slip rating, or a textured matt finish, deals with the grip.
The other consideration is the subfloor. On a suspended timber floor, tile needs a rigid overlay board and a decoupling matting, or the grout will crack as the floor flexes. That preparation adds significant cost, which is why we often steer clients towards LVT upstairs and tile downstairs.
- Sheet vinyl: most watertight, warmest, cheapest — £28–£48 / m² fitted
- Glue-down LVT: best looks with real practicality — £45–£75 / m² fitted
- Porcelain tile: most durable, needs UFH and an R11 finish — highest prep cost
- Never: laminate, click vinyl, engineered wood, carpet
Slip resistance explained
Slip resistance is expressed as an R rating from R9 to R13, tested on an inclined ramp with oil, and increasingly also as a Pendulum Test Value (PTV). For a domestic bathroom floor, R10 is a sensible minimum, and R11 is worth having in a family bathroom or a wet room.
A PTV of 36 or above is regarded as low slip potential in the wet. Reputable manufacturers publish these figures; if a product's slip data is nowhere to be found, that is informative in itself.
Texture is the practical version of the same thing. A matt, lightly textured surface will always outperform a gloss one when wet, whatever the material — and gloss finishes in bathrooms also show every water spot and footprint.
Fitting details that prevent leaks
Seal the perimeter. Every edge — against the bath panel, the shower tray, the wall, the WC pedestal, the pipe boxing — gets a flexible sealant bead. Water always finds the gap you did not seal.
Seal around pipes. Radiator and waste pipes coming up through the floor are the most common leak path in a bathroom. A tight cut and a bead of sealant, not a loose cover rose.
Take the floor under the bath panel and under the WC pedestal where practical. A floor that stops at the visible edge means a leak runs straight onto bare subfloor.
In a wet room, the floor covering must be coved up the wall by at least 100mm behind the wall finish, and the shower area needs a tanked, falls-formed subfloor. That is a specialist build-up and should not be improvised.
Finally, check the finished height against the door. Bathroom doors typically open inwards over the floor, and adding a levelling compound plus a floor covering can leave a door catching. Trim it before fitting, not after.
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Frequently asked questions
What is the best flooring for a bathroom?
Sheet vinyl for maximum watertightness and value, or glue-down LVT with a textured finish and fully sealed perimeter where looks matter more. Both are warm underfoot and safe when wet.
Can you put LVT in a bathroom?
Yes, provided it is glued down rather than click, has a textured finish for grip, and the perimeter and pipe penetrations are sealed. Click LVT lets water reach the subfloor through its joints.
What slip rating do I need for a bathroom floor?
R10 is a sensible minimum for a domestic bathroom, and R11 is worth specifying in a family bathroom or wet room. A Pendulum Test Value of 36 or above indicates low slip potential when wet.
Can laminate go in a bathroom?
No. The wood-fibre core swells permanently once water reaches the joints, and in a bathroom it always eventually does. Vinyl, LVT or tile are the appropriate choices.