ISO Frame Modular Buildings FAQ

ISO Frame modular buildings can be used as portable cabins, but they are not limited to basic cabin use. The steel-frame system can support offices, welfare facilities, classrooms, storage hubs, security cabins, hospitality units and multi-storey modular buildings. Compared with a basic portable cabin, an ISO Frame unit can be specified with higher insulation, enhanced fire performance, upgraded glazing, DDA access and more durable commercial finishes.

A portable cabin is usually a relocatable unit used for office, welfare, storage or site accommodation. A modular building is a broader term that can include single cabins, linked buildings, stacked units, classrooms, offices, healthcare spaces, welfare blocks and bespoke configurations. ISO Frame units sit between these categories because they can work as individual portable cabins or as part of a larger modular building system.

Yes. Standard ISO Frame units can be configured for multi-storey layouts up to three levels, depending on the design, structural review, site conditions and project requirements. REI60 fire-rated configurations may have different stacking limits. Final approval depends on structural design, fire strategy, access, escape routes, foundations and Building Control requirements.

ISO Frame units are produced under certified manufacturing and quality systems, including ISO 9001 quality management, ISO 1090 structural steel certification, ISO 3834 welding quality assurance, ISO 14001 environmental management, ISO 27001 information security, ISO 22301 business continuity and ISO 8501 surface preparation standards. This supports traceability, repeatability and long-term structural reliability.

Standard frame RAL options can include 3000, 5010, 7016, 7035, 9002 and 9010. Wall panel RAL options can include 5010, 7016, 7035, 9002 and 9010. Standard colours can help speed production, while custom finishes may be discussed for branding, visual identity or project-specific requirements.

The standard flooring system uses 2 mm commercial-grade PVC in a grey finish with sealed joints and grey PVC strips. This gives a hard-wearing, easy-clean finish suitable for high-traffic modular offices, welfare units, classrooms, storage and commercial portable cabin use.

Yes. A DDA PVC glazed door option can be supplied, typically around 1150 × 2100 mm, with RAL 7016 exterior, white interior, insulated glazing and a three-key cylinder lock. Final accessibility requirements should be reviewed against the intended use, site layout, threshold design, ramp access and Building Regulations requirements.

Energy performance depends on the selected specification. The Part L 2021 A-rated ISO Frame option includes upgraded roof, wall and floor insulation, upgraded windows and glazed doors with U-values around 0.5 W/m²K, and a 4.5 SCOP air-to-air heat pump. This route is designed for lower running costs and improved long-term comfort compared with basic portable cabin specifications.

The REI60 ISO Frame option is designed for environments requiring enhanced fire protection. REI60 refers to 60 minutes of load-bearing capacity, integrity and insulation under the relevant fire-performance approach. This may be relevant for schools, healthcare, public buildings, accommodation units, server rooms or grouped modular buildings. Final suitability must be checked against the project fire strategy.

Yes, ISO Frame units can be used as modular classrooms or education support buildings, subject to final specification, layout, access, safeguarding, fire strategy, ventilation, acoustics, energy performance and approvals. Schools should confirm whether the requirement is temporary, semi-permanent or long-term before choosing the unit specification.

Yes. ISO Frame units can be configured as welfare facilities, including staff welfare, canteens, changing areas, drying rooms, toilets, showers and site offices. The final layout depends on workforce numbers, intended use, services, water, waste, drainage, access and the site’s welfare strategy.

Yes. ISO Frame modular buildings can support hospitality, sports, padel clubs, leisure sites, cafés, viewing facilities, reception buildings and commercial accommodation support spaces. The system can be specified with upgraded finishes, glazing, cladding and access arrangements to suit public-facing environments.

ISO Frame units can be suitable for public sector, council, education, healthcare and commercial projects where repeatability, traceability, structural reliability and clear specification are important. Final compliance depends on the project brief, procurement route, Building Control, planning, fire strategy, accessibility and operational requirements.

Planning requirements depend on the intended use, location, duration, size, appearance, site constraints and local authority position. Some temporary or relocatable buildings may still require planning review. Buyers should check the specific project with the local planning authority or appointed consultant before assuming planning is not required.

Building Regulations compliance depends on the final use, design, specification, installation, fire strategy, energy performance, accessibility and Building Control route. KC Cabins Solutions Ltd can discuss standard, REI60 and Part L 2021 A-rated options, but final compliance must be confirmed for the individual project.

To quote an ISO Frame modular building, KC Cabins Solutions Ltd usually needs the site postcode, intended use, number of units, preferred size, layout, temporary or long-term requirement, service needs, access details, delivery restrictions, fire or energy requirements, target date and any planning or Building Control information already known.