Description
20ft x 24ft Modular Build – Flexible Space for Offices and Classrooms
Buildings modular trio – triple unit modular building for larger offices or premium marketing suites, in stock and ready for despatch.
Expand your space quickly and efficiently with our 20ft x 24ft modular build. This versatile ISO Frame modular building is ideal as a portable office, classroom, marketing suite or site accommodation, giving you high‑quality space without the delays of traditional construction.
Whether you need a temporary solution or a long‑term modular building, this unit delivers a modern, comfortable environment that meets today’s performance expectations.
High‑quality ISO Frame modular building
This modular building is based on our proven ISO Frame system, combining a robust steel structure with insulated sandwich panels and premium finishes.
Frame and wall colours
Customise the look of your modular building with a wide choice of RAL colours:
- Frame RAL options: RAL 3000 (Flame Red), RAL 5010 (Gentian Blue), RAL 7016 (Anthracite Grey), RAL 7035 (Light Grey), RAL 9002 (Grey White), RAL 9010 (Pure White)
- Wall panel RAL options: RAL 5010, RAL 7016, RAL 7035, RAL 9002, RAL 9010
Manufacturing standards
Your modular build is produced under strict quality systems, including:
- ISO 9001 – Quality Management
- ISO 1090 – Steel Structures
- ISO 3834 – Welding Quality
- ISO 14001 – Environmental Management
- ISO 27001 – Information Security
- ISO 22301 – Business Continuity
- ISO 8501 – Surface Preparation
Three specification options
This 20ft x 24ft ISO Frame modular building is available in three specifications, so you can match performance and budget to your project.
1) Standard ISO Frame unit
A robust, stackable unit for general office and classroom use.
Construction
- Steel container supporting structure made of cold‑bent profiles
- Joined by bolts (flat‑pack) to EN ISO 3834‑2 and EN 1090‑1
- Steel frame blast‑cleaned to Sa 2.5 (EN ISO 8501‑1)
- ISO transport handles at corners
- Stackable up to three floors
Roof (layered)
- 0.5mm galvanised steel sheet
- 10mm chipboard
- 100mm mineral wool
- Polyethylene vapour barrier
- 8mm white laminated board
- Rainwater drainage via waterspout and corner downpipes
- Roof load capacity: 1.6 kN/m²
Walls (sandwich panel)
- External: 0.5mm varnished sheet, trapezoidal linear
- Insulation: 80mm mineral wool
- Internal: 0.5mm varnished sheet, smooth RAL 9010
Floor (layered)
- 22mm P5 chipboard
- 100mm mineral wool insulation
- 0.5mm galvanised low‑fold sheet metal
- Floor load capacity: 2000 kg/m²
Electrical installation
- Prepared to UK standards
- Convector electric heaters
- 230V sockets
- IP65 protective LED lamps 2 x 18W
- Metal fuse board
2) ISO Frame REI60 fire‑rated unit
For higher‑risk environments, choose the REI60 option with 60‑minute fire resistance.
Fire resistance (REI60)
- R – Load‑bearing capacity: 60 minutes
- E – Integrity: 60 minutes
- I – Insulation: 60 minutes
Construction & frame
- Steel frame treated in closed‑circuit blasting chamber
- Spray painted in cabin‑dryer
- Stackable up to two floors
- ISO transport handles at corners
Roof (layered)
- 0.55mm galvanised steel sheet
- 10mm fibre board
- 60mm mineral wool
- Polyethylene vapour barrier
- 60mm layered board with wool (double‑sided white smooth sheet metal)
- 2 x G‑K plasterboard
- Rainwater drainage via corner post downpipes
- Standard snow load: sk = 1.6 kN/m²
Walls
- External: 0.5mm painted sheet metal, trapezoidal linear
- Insulation: 120mm Rockwool
- Internal: 0.5mm painted sheet metal, smooth RAL 9010
Floor (layered)
- 20mm cement‑fibre board
- Polyethylene film
- 100mm mineral wool insulation
- 0.5mm low‑corrugated galvanised sheet metal
- Load capacity: 200 kg/m²
Electrical installation
- Surface‑mounted system
- 8 MOD safety metal switchboard (separate)
- 230V power installation
- IP65 protective LED lamps (2 x 18W)
- Convector electric heaters
3) ISO Frame Part L “A” energy rated unit
Our highest‑performance specification, designed to meet Part L building regulations with excellent thermal efficiency.
Roof (layered)
- 0.5mm galvanised steel sheet
- 10mm chipboard
- 125mm PIR insulation
- Polyethylene vapour barrier
- 60mm mineral wool panel with smooth metal sheet both sides
- Waterspout and corner downpipes for rainwater drainage
- Load capacity: 1.6 kN/m²
Walls
- Layered panel construction
- External: 0.5mm varnished sheet, trapezoidal linear
- Insulation: 240mm mineral wool plate
- Internal: 0.5mm varnished sheet, smooth RAL 9010
Floor (layered)
- 20mm cement‑bonded particleboard
- Polyethylene film
- 120mm PIR plate insulation
- 0.5mm galvanised low‑fold sheet
- Second layer: additional polyethylene film, 120mm PIR plate insulation, 0.5mm galvanised low‑fold sheet
- Load capacity: 200 kg/m²
Upgraded windows and glazed doors
- Enhanced U‑value: 0.5 W/m²K
- Anti‑vision glazing
- Energy‑efficient double glazing
Electrical installation
- Surface‑mounted system
- 8 MOD safety metal switchboard (separate)
- 230V power installation
- IP65 protective LED lamps (2 x 18W)
- 4.5 SCOP air‑to‑air heat pump with cooling
Doors, windows and flooring
Across the modular build range you benefit from:
Flooring
- 2mm PVC commercial‑grade floor covering
- Grey colour lining with sealed joints
- Grey PVC floor strips
Windows
- PVC frame construction
- RAL 7016 exterior, white interior
- U‑value: 1.1 W/m²K (upgraded to 0.5 W/m²K on Part L option)
Doors
- DDA PVC glazed door, 1150 x 2100mm, insulated glazing with horizontal division, RAL 7016 / white interior, secure lock cylinder with 3 keys, signboards and handles
- Steel single door, 900 x 2000mm, thermally insulated, RAL 7016 / white interior, secure lock cylinder with 3 keys, signboards and handles
Flexible payment options and all‑inclusive pricing
Choose the payment plan that suits your project:
- Full payment: £31,250.00 (100% upfront)
- Staged payment: £34,125.00 (40% on order, 55% on delivery, 5% 14 days after handover)
Prices include delivery and assembly within UK mainland, giving you a seamless solution from factory to finished space.
Ideal applications for this modular build
This 20ft x 24ft modular build is perfect for:
- Corporate offices and project offices
- Classrooms and training rooms
- Marketing suites and showrooms
- Site accommodation and welfare facilities
To see more examples of how clients use our products, visit our
full range of modular building solutions
or learn more about our company and certifications on the
About KC Modular Buildings page.
For technical guidance on electrical design, our installations follow current
BS 7671 wiring regulations. For energy performance, we can also design your project to support the principles in the UK government’s
Approved Documents (including Part L).
Contact us about your modular build
To discuss layouts, specifications or lead times for this 20ft x 24ft modular build,
contact KC Modular Buildings or call 01782 561110. Our team can help you choose between the Standard, REI60 and Part L “A” energy rated options and tailor the building to your exact requirements.
