Volumetric modular construction delivers fully enclosed 3D modules — complete with mechanical, electrical, plumbing, and interior finishes — fabricated under controlled factory conditions. Each module is a structural steel box that stacks and connects on site to form a finished building in weeks, not months.
Each volumetric module follows a 14-station production line inside our factory. Every station has defined quality gates — nothing moves forward without passing inspection.
Structural steel frame welded to ±1mm dimensional tolerance. 550 MPa yield strength S355 steel. Base frame, columns, and roof beams assembled on precision jigs — full weld inspection at every joint before proceeding.
External wall panels, breathable membrane, sheathing board, and window apertures installed. The module is weather-tight before any internal work begins — no water ingress, no dew point risk, no construction moisture trapped inside the assembly.
All mechanical, electrical, and plumbing rough-in completed within the module. Conduits, pipework, duct runs, cable trays, and back boxes installed. Plumbing circuits pressure-tested to 10 bar. Electrical continuity verified circuit-by-circuit before enclosure.
Mineral wool insulation to external walls, floor, and ceiling achieving U=0.15 W/m²K. Fire-rated plasterboard to 120-minute standard. All joints taped and filled to Level 4 finish. Acoustic resilient bars at party wall locations. Airtightness <3 m³/h/m² at 50Pa verified by blower door test.
Floor coverings, ceramic wall tiles, and paint finishes applied under controlled humidity (40–60% RH) and temperature (18–22°C). Kitchen cabinetry, wardrobes, interior doors, skirtings, and architraves installed. All joinery fitted to ±1mm tolerance. No weather delays, no drying-out period.
Sanitaryware, light fittings, switches, sockets, thermostats, and ventilation terminals installed. Full system commissioning: plumbing pressure hold test (30 min at 10 bar), electrical insulation resistance at 500V DC, HVAC airflow balancing, fire detection verification. Photographic record of every test result.
Engineered to Eurocodes. Independently tested and third-party certified. Every value below is contractually guaranteed, not aspirational.
| Parameter | Specification | Standard / Test Method |
|---|---|---|
| Structural Frame | Steel S355, yield strength 550 MPa | EN 1993-1-1 (Eurocode 3), EN 1090-2 EXC3 |
| Dimensional Tolerance | ±2mm across any 3m face | BS 5606, laser-verified at Station 3 & Station 14 |
| Maximum Module Size | 4.5m × 16.0m × 3.6m (W×L×H) | Transport-limited; larger by special permit |
| Building Height Capability | Up to 30 storeys (steel frame) | EN 1993-1-8 joint design, concrete core for 12+ |
| Fire Resistance | 120 minutes (integrity & insulation) | BS EN 13501-2, Type IA/IB construction |
| Acoustic — Airborne | DnT,w + Ctr ≥ 45 dB | BS EN ISO 16283-1, tested in factory |
| Acoustic — Impact | L'nT,w ≤ 62 dB | BS EN ISO 16283-2, tested in factory |
| Thermal Transmittance | U = 0.15 W/m²K (external wall) | BS EN ISO 6946, 140mm mineral wool |
| Airtightness | <3 m³/h/m² at 50 Pa | BS EN ISO 9972 (blower door, per module) |
| Design Life | 60 years (structural) | BS 7543, BOPAS-accredited |
| Factory Completion | 80–95% | Including MEP, finishes, joinery, appliances |
| Typical Programme | 12–20 weeks factory + 4–8 weeks site | Site = foundations, connections, commissioning |
When quality, speed, and predictability are non-negotiable, volumetric modular outperforms every other construction method. Here is why.
80–95% of all work happens indoors, under controlled conditions. Trades work in sequence on a moving production line — no weather delays, no trade stacking, no rework from water damage. The result: zero-snag handover is the norm, not the exception.
Every module is built to the same digital model on the same jigs by the same teams. Module #1 and module #200 are dimensionally identical within ±2mm. No site-to-site variance. No crew-to-crew variance. This repeatability compounds: stack tolerances remain predictable across 12+ storeys.
While modules are being fabricated in the factory, site teams pour foundations, install utilities, and prepare the podium. The moment the first module arrives, the building rises at 6–8 modules per day. A 100-unit apartment block can be weather-tight in under two weeks — cutting total programme duration by 30–50% versus traditional construction.
Every module undergoes factory acceptance testing (FAT) before leaving the production line: plumbing at 10 bar, electrical insulation at 500V DC, HVAC commissioning, fire system verification, blower door test. Defects found in the factory are fixed in minutes. Defects found on a traditional site take days and involve multiple trades.
Choose the right system for your project. This comparison is based on a 100-unit, 8-storey apartment building.
| Metric | Volumetric | Panelized (2D) | Traditional |
|---|---|---|---|
| Factory Completion | 80–95% | 40–60% | <5% |
| On-Site Labour (person-hours/m²) | 4–6 | 8–12 | 18–25 |
| Weather Dependency | Very Low | Moderate | High |
| Total Programme Duration | 16–28 weeks | 24–38 weeks | 52–78 weeks |
| Quality Consistency | Excellent | Good | Variable |
| Transport Cost (relative) | High | Low | N/A (materials only) |
| Design Flexibility | Moderate | High | Very High |
| Best Application | Hotels, student housing, hospitals, multi-family | Offices, schools, low-rise residential | One-off bespoke, very complex geometry |
| Capital Cost (relative to traditional) | 95–105% | 90–100% | 100% (baseline) |
| Whole-Life Cost | Lower (quality, energy, maintenance) | Comparable | Baseline |
Share your project brief and we will prepare a technical feasibility assessment with programme timeline, cost model, and module configuration options — typically within 72 hours.
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