Freestanding Baths and Luxury Bathroom Specification: What to Get Right

The freestanding bath has become the centrepiece of the luxury London bathroom — chosen for its sculptural quality and its signal of a certain standard of specification. It is also one of the most frequently misspecified elements in a bathroom renovation: the bath is beautiful, the floor around it is not flat enough, the waste is in the wrong position, and the taps look wrong.

Here is how to get the specification right.

The bath itself: materials and proportions

Freestanding baths are available in a range of materials, each with different properties:

Cast iron: The traditional choice. Heavy (150–250kg empty), retains heat exceptionally well, durable, and resistant to chipping. Original Victorian and Edwardian roll-top cast iron baths are among the most desirable bathroom pieces — the originals should be restored (re-enamelled) rather than replaced where possible. New cast iron baths are manufactured by a smaller number of specialist foundries than previously (Hurlingham, Drummonds, Burlington). Lead time can be 8–16 weeks for made-to-order.

Acrylic (LUCITE or equivalent): Lightweight, warm to the touch, available in almost any shape. The entry point for freestanding baths and the most commonly specified. Quality varies enormously — specify a minimum 6mm shell thickness with a reinforced base; cheap acrylic baths flex and creak. Poor acrylic scratches and goes yellow. Good acrylic is more resistant, but never as durable as cast iron or stone.

Stone resin / solid surface: A composite of stone aggregate and resin, moulded to shape. Heavier than acrylic, warmer than stone, with a very smooth matte finish. Increasingly popular in minimalist luxury bathrooms. Brands include Victoria + Albert, Kaldewei (enamel steel), and specialist stone resin manufacturers.

Natural stone: The ultimate specification. A bath carved or cast from a single piece of marble, travertine, or onyx. Extremely heavy (300–600kg or more), requires structural floor support, and costs £15,000–60,000 for a quality piece. For a client who wants a truly distinctive bathroom, a stone bath is irreplaceable. For everyone else, stone resin gives a similar aesthetic at a fraction of the weight and cost.

Proportions: A standard freestanding bath runs 1500–1800mm long. Anything below 1500mm is cramped for an adult. Double-ended baths (symmetrical) suit a bath that will be positioned in the centre of the room; single-ended baths are more practical for a bath against a wall or in a corner.

Floor position and structural preparation

A freestanding bath requires a floor strong enough to carry the concentrated load — particularly cast iron and stone baths, which may be 500kg fully loaded. In a bathroom above a timber-joisted floor, the structural engineer should check the joist capacity and specify additional blocking or new joists if required.

The position of the bath must be determined before the floor is laid — the waste outlet must be in precisely the right position. A freestanding bath waste is typically in the centre of the base of the bath; on a cast iron roll-top, the waste is at one end. The floor waste must be cut through the screed and slab to exit through the floor structure to the drainage below. This is irreversible once the floor is tiled.

For a stone floor around a freestanding bath, the floor must be very flat — any rocking of the bath feet on an uneven floor is highly visible and potentially damaging.

Taps: the most important visible detail

The taps (or mixer) for a freestanding bath are among the highest-impact design decisions in a bathroom. The options:

Floor-standing taps: The most architecturally resolved choice for a bath positioned away from any wall. Floor-standing freestanding bath fillers typically rise 800–1200mm from the floor, with a gooseneck or angled spout. They require a hole in the floor for the pipework — this must be planned at first fix.

Bath-mounted taps: Taps that sit on the rim of the bath. Standard for acrylic baths and many stone resin baths; not available on cast iron roll-tops without drilling (which weakens the rim). Rim-mounted taps require the hot and cold supply pipes to run through the floor structure to below the bath position — again, first-fix planning is essential.

Wall-mounted taps: For a bath positioned against a wall. The supply pipes are concealed within the wall; the taps project from a plate on the wall surface. Clean and minimal; requires the wall finish behind the bath to be water-resistant.

Metal finish: The tap finish must be agreed in the context of the whole bathroom — and ideally the whole property. Polished chrome, brushed brass, unlacquered brass, gunmetal, brushed nickel. Choose one metal finish and apply it consistently to all taps, fixtures, towel rails, and accessories. Mixing finishes reads as unresolved.

Quality: Quality tap manufacturers (Vola, Fantini, Dornbracht, Waterworks, Samuel Heath, THG Paris) produce fittings with a smooth action, consistent finish, and ceramic disc cartridges that will last decades without maintenance. Budget taps — whatever they look like on the product photograph — feel wrong in use and discolour within a few years.

The shower question

In a primary family bathroom, a freestanding bath alone is often not sufficient — a separate shower enclosure is required for daily use. The bath is for the weekend; the shower is for Monday morning.

The relationship between the bath and the shower in a luxury bathroom requires thought. Options:

• —Bath and wet room: The entire bathroom (or a zone of it) is tanked as a wet room; the freestanding bath sits within this zone; there is a showerhead (either ceiling-mounted or on a wall arm) for showering over the bath or standing beside it. This requires very careful drainage design.
• —Separate shower enclosure adjacent: A glazed shower enclosure or wet room area that is separate from the bath, often behind the bath or along one wall. This is the most practical arrangement for a family bathroom.
• —Bath in a dedicated dressing/bathing room: In a very large master suite, the bath occupies its own room — a bathing room — with an adjacent separate shower room. The ultimate specification.

Heated towel rails and accessories

The accessories in a luxury bathroom — towel rails, toilet roll holders, soap dispensers, hooks, robe hooks — are the ironmongery of the bathroom, and the same principle applies: one metal finish, consistently applied, from a quality manufacturer.

Heated towel rails: Specify a rail that is adequate for the size of the bathroom. A rail that is too small for the number of towels needing to dry is a constant frustration. Hydronic (plumbing-connected) rails are the warmest and most efficient; electric rails are easier to control independently.

Accessories: Surface-mounted vs recessed. In a high-specification bathroom, recessed accessories (toilet roll holder, soap dispenser) read more cleanly. They require the positions to be agreed and built in before tiling — recessing cannot be retrofitted without damaging tiles.

Budget guidance

ASAAN's approach

ASAAN specifies and installs luxury bathrooms across prime London residential projects. We manage the coordination between first-fix plumbing, structural preparation, stone or tile installation, and second-fix to ensure the final result matches the design intent.

If you are planning a bathroom renovation, contact us to discuss specification.