Wet Room vs Shower Room: Which Is Right for Your Home?

What actually separates the two

A shower room uses a tray or upstand to contain water within a defined footprint, with a shower door or screen keeping splashes in. A wet room, by contrast, waterproofs the entire floor and relevant walls, with the whole floor gently sloped towards a drain so there is no lip, tray or step anywhere in the room.

This sounds like a small distinction but it changes almost everything about how the room is built, because the floor structure, waterproofing extent and drainage all have to be designed around the whole room rather than a single shower area.

Tanking and waterproofing requirements

In a shower room, waterproofing is generally focused on the shower enclosure itself and a modest surround. In a wet room, tanking needs to extend across the entire floor and up the walls to a reasonable height throughout the room, because water is not contained to one area.

This means more membrane, more time, and more attention to detail at joints, corners and pipe penetrations, since any gap in a wet room's tanking is far more likely to lead to water finding its way into the floor void or ceiling below.

Gradients and linear drains

A wet room floor needs a consistent fall, typically around 1:40 to 1:80 depending on the drain type, so that water reliably runs to the drain rather than pooling. This fall has to be built into the floor structure itself, either with a formed screed or a purpose-made drainage former.

Linear drains, which run along one edge of the room rather than sitting as a single point drain, have become popular because they allow a simpler single-direction fall and a cleaner look, but they need careful planning around furniture and fittings that sit near the drain run.

Floor build-up on joisted timber floors

This is where most UK wet room jobs get complicated. Many houses in Harpenden and St Albans, particularly Victorian and 1930s properties, have suspended timber floors rather than solid concrete. Building a fall into a timber floor means either notching joists, adding firring pieces to create the slope, or installing a purpose-made drainage tray system designed for timber floors.

This work has to be done without compromising the structural integrity of the joists, and building regulations require any significant notching or drilling to stay within set limits. It is one of the main reasons wet rooms on upper floors of older houses cost more and take longer than the equivalent job on a solid ground floor.

Suitability and accessibility

Wet rooms are a genuinely good option where level access matters, for example for households with reduced mobility or where a step-free shower is a long-term need. The absence of a tray or step also makes cleaning easier and removes a common trip hazard.

They are less well suited to smaller bathrooms where the whole-room waterproofing and fall requirements are hard to justify for a modest shower area, and they generally need good extraction to manage the larger area of standing water and steam compared with an enclosed shower.

Maintenance considerations

Wet rooms have fewer seals and grout lines to maintain around a shower door, but the drain itself, particularly a linear drain, needs regular clearing of hair and debris to keep water flowing away properly.

Shower rooms have a tray seal and screen seals that need occasional resealing over the years, and trays can develop hairline cracks over a long lifespan, whereas a properly tanked wet room floor, if installed correctly, tends to be a one-time job that lasts as long as the tiling itself.

Indicative costs

As a broad indication, a shower room conversion is often cheaper, sitting somewhere in the region of £3,000 to £5,500 for a straightforward job with standard fittings. A wet room, particularly one requiring floor structure alterations on a timber floor, often runs higher, commonly in the £5,000 to £9,000 range or more depending on size and specification.

These figures are indicative only and vary with the extent of structural work, tiling standard and whether existing pipework needs relocating, so a site visit and written quote is always the right way to get an accurate figure for your home.

Making the decision

If accessibility, a step-free design or a larger bathroom with a contemporary look is the priority, a wet room is usually worth the extra investment. If you have a smaller bathroom, a solid concrete ground floor, or a tighter budget, a well-fitted shower room will do the job just as well without the additional structural work.

Frequently asked questions

Can I have a wet room upstairs in an older house?

Yes, but it usually requires additional work to build a fall into the timber floor structure, either through firring pieces, notched joists within regulation limits, or a purpose-made drainage tray for timber floors.

Do wet rooms leak more than shower rooms?

Not if tanked correctly. A properly waterproofed wet room is as reliable as a shower tray, but the tanking must extend across the whole floor and be detailed carefully at joints and drain penetrations.

Is a linear drain better than a point drain?

Linear drains allow a simpler single-direction fall and often look neater, but they need to be positioned carefully in relation to fittings. Point drains suit smaller or more irregular rooms.

Are wet rooms more expensive than shower rooms?

Generally yes, particularly on suspended timber floors where structural work is needed to create the fall. As an indicative guide, wet rooms often cost several thousand pounds more than an equivalent shower room.

Do wet rooms need better extraction?

Yes, because water covers a larger area and there is no door or screen containing steam, so a properly sized and ducted extractor fan is particularly important in a wet room.