A shower enclosure and tray are among the most cost-variable elements of a bathroom fit-out. A basic framed quadrant unit with a low-profile acrylic tray can be bought for under £300 and fitted in a day; a frameless walk-in enclosure with a stone resin tray and bespoke glass panels runs to several thousand pounds. Understanding what drives the difference — and what matters for your specific situation — will help you spend the right amount.
Standard Shower Enclosure Sizes
British bathrooms are not generous by international standards, so enclosure sizes are engineered around common bathroom dimensions. Standard sizes (all measurements width × depth):
| Enclosure size | Suitability |
|---|---|
| 760 × 760 mm | Minimum practical size; tight but usable in small en suites |
| 800 × 800 mm | Most common small enclosure; suits most en suites |
| 900 × 900 mm | Comfortable for most adults; popular family bathroom size |
| 1,000 × 800 mm | Rectangular; gives extra elbow room |
| 1,200 × 800 mm | Standard walk-in or double-door size |
| 1,200 × 900 mm | Generous; suits larger bathrooms |
| 1,400 × 900 mm+ | Walk-in / wet room territory |
Always measure your available floor space with the door swing in mind. Bi-fold and pivot doors need clear space to open; sliding doors suit alcoves where swing space is limited.
Types of Shower Enclosure
Quadrant (Corner Entry)
A quarter-circle shape that fits neatly into a corner. Sliding curved doors mean no outward swing. Space-efficient and popular in smaller bathrooms. Available in standard 800 mm and 900 mm radius sizes.
Square / Rectangular Corner Entry
Two glass panels form a right-angle with two walls, with a door panel on one or both open sides. More flexible in larger bathrooms. Easier to clean than curved quadrant seals.
Alcove / Recess
Fits between three walls. One or two sliding or bi-fold doors on the open face. Maximum use of floor space. Ideal when you are removing a bath and converting to shower-only.
Walk-In (Open or Wetroom Style)
No door — a fixed glass panel deflects water. Requires a level-access or slightly raised tray with precise falls to a linear drain, or a full wet room tanked floor. Increasingly popular in main bathrooms. Needs at least 1,400 mm depth to prevent cold draughts.
Frameless vs Framed vs Semi-Frameless
- Framed: aluminium frame around all glass edges. Lower cost, more rigid, easier to seal. Aluminium profiles can look dated but are practical.
- Semi-frameless: frame around the door and base only; glass sides are frameless. Mid-range look and price.
- Frameless: 8–10 mm toughened glass with minimal or invisible fittings. Premium look; higher cost for glass and hardware.
Shower Tray Types and Materials
The tray sits below the enclosure and channels water to the waste. The main material options:
| Material | Cost (tray only) | Weight | Feel underfoot | Lifespan |
|---|---|---|---|---|
| Acrylic | £40–£150 | Light | Warm, slightly flexible | 10–20 years |
| Stone resin (solid) | £150–£500 | Heavy | Solid, stone-like | 25+ years |
| Ceramic / fireclay | £100–£400 | Very heavy | Very solid | 25+ years |
| Tiled / wetroom | Material cost only | N/A | Tile surface | Depends on waterproofing |
Acrylic trays are the most common in mid-range bathrooms. They are lightweight, warm underfoot in winter, and easy to fit — but can flex slightly and may show scratches over time.
Stone resin trays (brands such as Coram, Kudos, or Simpsons sell own-label versions; avoid evaluating specific brands) feel genuinely solid and have a premium matt finish. They cannot flex or crack under normal use and suit frameless enclosures where a high-end finish is important.
Low-profile vs standard-height: Low-profile or “ultra-slim” trays (25–45 mm high) sit near-flush with the floor and suit modern bathrooms with underfloor heating. Standard trays (75–110 mm) are easier to plumb (waste pipe has more clearance) and suit older floors where precise falls are harder to achieve.
Enclosure Glass: Thickness and Safety
All shower enclosures sold in the UK must use toughened (tempered) safety glass complying with BS EN 12150. Standard framed enclosures use 4–6 mm glass; frameless and semi-frameless enclosures use 8–10 mm for structural rigidity without a frame.
Easy-clean coatings (hydrophobic nano-coatings) reduce limescale and soap scum adhesion. They are worth paying for if you live in a hard-water area — roughly two-thirds of England and Wales has moderately hard to very hard water.
Cost Breakdown
| Item | Budget | Mid-range | Premium |
|---|---|---|---|
| Enclosure (unit only) | £150–£300 | £350–£700 | £800–£1,500+ |
| Tray (unit only) | £40–£120 | £120–£300 | £300–£600 |
| Waste fitting | £20–£50 | £40–£80 | £60–£150 |
| Shower installation (plumber, 1 day) | £250–£350 | £300–£450 | £350–£600 |
| Tiling (if required, per m²) | £50–£80/m² | £80–£120/m² | £120–£200+/m² |
Typical total supply-and-fit cost (enclosure + tray + waste + plumber, no tiling): £500–£1,200
If the existing floor and walls need tiling before the enclosure goes in, add £300–£800 depending on area and tile choice.
Installation: Key Considerations
Floor structure: Low-profile trays must sit on a perfectly level, solid sub-floor. Timber joists may require noggins or a plywood base. Stone resin trays on upper floors need careful structural consideration — a 900 × 900 mm stone resin tray weighs 25–45 kg before water load.
Waterproofing: Tiled shower areas require waterproof tanking membrane behind the tiles (Approved Document C, Building Regulations). This is particularly important at the base-to-wall junction. Ready-built enclosures with their own seals and profiles handle this junction differently — follow manufacturer instructions exactly.
Waste plumbing: Most trays take a 90 mm or 90 × 50 mm waste trap. Confirm your floor void has enough depth for the trap before ordering a low-profile tray. Linear drains (used with walk-in enclosures) require careful positioning and a minimum 1:80 fall across the tiled floor surface.
Ventilation: Building Regulations Approved Document F requires adequate ventilation in bathrooms. An extract fan running at a minimum of 15 litres/second in intermittent mode is required in any room with a shower where there is no openable window — and even where there is, mechanical ventilation is best practice.
Choosing the Right Combination
| Bathroom type | Recommended enclosure | Recommended tray |
|---|---|---|
| Small en suite (< 2 m²) | Quadrant 800 × 800 mm | Acrylic, low-profile |
| Standard family bathroom | Alcove 1,200 × 800 mm | Stone resin, low-profile |
| Large main bathroom | Walk-in 1,400 mm+ | Stone resin or tiled wetroom |
| Loft conversion en suite | Quadrant or rectangular, size to fit | Acrylic or stone resin |
| Accessible / wetroom | Open walk-in with grab rail space | Tiled level-access floor |
Buy the enclosure and tray from the same manufacturer where possible — profiles and seal dimensions are designed to mate correctly, reducing the risk of leaks at the base joint, which is the most common cause of shower-related water damage in UK homes.
