Objects · Bespoke Stone Objects

Bathtubs

Freestanding and built-in natural stone bathtubs — carved from a single block or precision-fabricated — for master bathrooms, spa suites, and palatial interiors where the bath is the centrepiece of the room.

A natural stone bathtub is one of the few objects in architecture that carries genuine physical weight — in material, in presence, and in the permanence of what it says about the space it occupies.

Metamar's Objects collection produces natural stone bathtubs at the level of quality that Saudi Arabia's most ambitious residential and hospitality projects demand. From a monolithic oval tub carved in a single sitting from a block of white Afyon marble to a rectangular freestanding bath fabricated in travertine with integrated overflow channels, each piece is engineered and hand-finished to order. No two stone bathtubs are identical — each carries the unique character of the block it came from.

The bathtub is the most visible and most photographed element in a luxury bathroom. For palace master suites, five-star hotel spa facilities, and ultra-luxury residential towers, the specification of a stone bath communicates an unambiguous statement about the quality of the project. Metamar's manufacturing capability — CNC carving, hand-finishing, and a supply chain that runs directly to owned quarries — means we can execute these objects at any scale, from a single bespoke tub to a full hotel floor of matching spa suites.

Types & Configurations

01
Monolithic Freestanding Tubs

The ultimate stone bath — carved from a single block with no joints or seams. The exterior can be smooth, carved with relief ornament, or profiled with classical mouldings. The interior is hand-finished to a smooth honed surface. Available in oval, rectangular, and custom plan forms.

02
Fabricated Freestanding Tubs

Assembled from precision-cut stone panels bonded with structural adhesive and concealed mechanical fixings. Achieves monolithic appearance at larger sizes or in stones where single-block availability is limited. Identical finish quality to the carved approach.

03
Built-In & Drop-In Tubs

Stone bathtub shells designed for installation into a built surround or platform. The interior bowl and visible exterior panels are stone; the underframe is structural. Allows full integration with a stone bathroom platform and step.

04
Spa & Soaking Tubs

Deep soaking tubs with interior depths of 550–650 mm — the Japanese ofuro form in natural stone. Typically rectangular with a clean honed interior and a single overflow slot. Favoured for hotel spa suites and private hammam spaces.

05
Carved & Ornamented Tubs

Freestanding tubs with carved exterior ornament — acanthus leaf borders, geometric bands, arabesque panels, or figurative feet. The exterior is treated as a sculptural object in its own right. Particular resonance for palatial master bathrooms.

06
Custom & Project-Specific

Any bathtub configuration that can be drawn can be produced — asymmetric plans, double-ended forms, integrated headrests, sunken platform integration, or specific dimensional requirements driven by a bathroom that has already been designed around the tub.

Bathtubs in Executed Projects

Stone bathtub thermal properties — spa suite

Why Stone is the Natural Choice for the Bath

Natural stone has exceptional thermal mass — it absorbs heat slowly and releases it slowly, keeping bathwater warm far longer than acrylic or resin alternatives. A thick-walled marble tub pre-warmed with hot water maintains bath temperature for 30–40 minutes longer than an equivalent acrylic shell.

For spa and hammam applications, the thermal properties of stone are not a secondary benefit but the primary functional specification. Metamar advises on wall thickness relative to interior volume to optimise the thermal performance of each tub to your brief.

  • Wall thickness range: 40 mm (standard) to 120 mm (maximum thermal mass)
  • Interior volume: custom to client specification
  • Pre-warming: all stone tubs designed for hot-water pre-warming
  • Hammam integration: can be built directly into a heated stone floor slab
  • Drain: standard 50 mm waste or custom position to plumber's drawings
Stone bathtub structural coordination — weight and installation

Engineering for a Permanent Object

A monolithic stone bathtub is a permanent architectural installation. A standard-size oval marble tub carved from 50 mm wall thickness will weigh 400–600 kg when empty; filled with water and occupied, the total load approaches 900 kg. Structural coordination is required before installation.

Metamar provides full weight schedules and load-distribution drawings for every bathtub at the time of order. For upper-floor installations, we work with your structural engineer to confirm the floor slab is adequate or to specify a spreader system.

  • Empty weight range: 250 kg (small fabricated) to 800 kg+ (large monolithic)
  • Floor load: point load or distributed load drawing provided
  • Structural coordination: weight schedule issued at order confirmation
  • Installation: Metamar can advise on or attend the lift-in operation
  • Access: tub dimensions confirmed against bathroom door and corridor

Materials & Capabilities

Available StonesMarble · Limestone · Travertine · Onyx — Please consult for other stone formations
Interior FinishHoned (standard) · Polished · Micro-smooth hand-buffed
⚠ Slip resistance values vary per stone and per finish — please consult our team before specifying.
Exterior FinishHoned · Polished · Brushed · Carved · Aged
Wall Thickness40 mm – 120 mm depending on form and stone type
Interior DimensionsFully custom — standard reference: 1,600 × 760 × 550 mm interior
Drain & OverflowStandard 50 mm drain · Custom position · Overflow: integrated slot or omitted
Weight (empty)250 kg – 800 kg+ depending on stone type, wall thickness, and size
ApplicationsPalace Master Bathrooms · Hotel Spa Suites · Luxury Villas · Private Hammams

From Drawing to Delivery

01
Dimension & Engineering Sign-Off

Client provides bathroom layout drawing. We confirm tub outer and inner dimensions, drain position, and overflow detail. A weight schedule is issued for structural sign-off before production begins.

02
Block Selection

For monolithic tubs, quarry block selection is critical. The block must be defect-free, consistently coloured, and large enough for the form without structural risk. We select and present the candidate block for client approval.

03
CNC Roughing & Hand Finishing

The exterior form is CNC-carved to within 5 mm of final profile. The interior bowl is routed in successive passes. Hand-carvers and stone polishers complete the final surface quality — interior to honed or polished finish, exterior to specification.

04
Inspection, Sealing & Delivery

The tub is filled with water for a leak test before leaving the factory. Drain fitting is trial-installed. The piece is sealed, wrapped in protective foam, and crated on a custom timber base. Installation is coordinated with your site programme.

Objects — Bathtubs

Discuss Your Project

Share your bathroom layout, stone preference, and any reference images for the tub form you have in mind. Our team will advise on block availability, production timeline, and structural requirements.

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