Cold Rooms & Insulated Panels — Selection & Buying Guide
Prefabricated insulated panel (PIR / PUR / mineral-wool) rooms are the standard construction for chilled, frozen and blast facilities. Panel U-value, joint sealing and floor design drive both CAPEX and lifetime energy cost.
What it is & where it's used
Modular sandwich panels with metal skins (0.5–0.7 mm pre-painted or stainless) and rigid foam core provide the thermal envelope of a cold facility. Panels lock together with cam-locks, tongue-and-groove and vapour-sealed joints.
- • Standalone cold-storage warehouses
- • Food-processing facility rooms
- • Retail back-of-store rooms
- • Pharmaceutical GMP storage
- • Restaurants and central kitchens
- • Chilled 0–5 °C rooms
- • Frozen –18 to –25 °C rooms
- • Blast –35 °C rooms
- • Controlled-atmosphere fruit storage
- • Pharmaceutical 2–8 °C GMP
- • Fast installation (days, not months)
- • Predictable thermal performance
- • Easy to expand and dismantle
- • Hygienic food-grade skins
- • Panel choice affects fire class (PIR B-s2,d0 vs PUR B-s3,d0 vs MW A2)
- • Joints and floor interface are the weakness — vapour sealing is critical
- • Cheap panels lose 20–40% of U-value performance within 5 years
Typical project sizes: 50 m² retail room up to 40,000 m² automated warehouse.
PIR / PUR Sandwich Panel vs Mineral-Wool Panel
| Criterion | PIR / PUR Sandwich Panel | Mineral-Wool Panel |
|---|---|---|
| Best for | Standard cold and frozen rooms | Fire-critical, insurance-driven and food-processing walls |
| U-value @ 100 mm | 0.22 W/m²K | 0.42 W/m²K |
| Panel thickness for –25 °C | 150–200 mm | 200–250 mm |
| Fire class | B-s2,d0 (PIR) / B-s3,d0 (PUR) | A2-s1,d0 (non-combustible) |
| Investment | Baseline | +15–35% |
| Weight | 10–14 kg/m² (100 mm) | 22–30 kg/m² |
| Applications | Chilled, frozen, blast | Bakeries, oil kitchens, insurer-mandated walls |
How to evaluate
- 01Specify U-value target — 0.14–0.18 W/m²K for frozen, 0.22–0.27 W/m²K for chilled.
- 02Insist on documented fire certification (EN 13501 / ASTM E84) for insurance approval.
- 03Verify panel skin thickness (0.6 mm minimum) and coating (PVDF for aggressive environments).
- 04Vapour barrier and joint sealing are more important than raw panel U-value — inspect installer references.
- 05Floor design: insulated with under-slab heating for frozen; poured after panel installation.
- 06Doors: sliding for wide openings, hinged for personnel, high-speed for high-traffic (>100 cycles/day).
- 07Confirm panel supplier warranty (typically 10 years on structure, 5 years on skins).
- 08Beware of ultra-low-cost panels with density <38 kg/m³ — they age poorly.
Spec checklist
- Room net internal dimensions and clear height
- Design temperature and humidity
- Panel U-value and thickness
- Panel skin material, thickness and coating
- Fire certification required (A2 / B / F)
- Door types, sizes and cycle counts
- Floor construction and load rating (kg/m²)
- Underfloor heating for frozen rooms
- Vapour barrier and joint sealing method
- Lighting IP rating and interior colour
Investment & operating cost
- Chilled room (0–5 °C, ≤200 m²)USD 250–450/m² panel-only
- Frozen room (–18 to –25 °C, ≤500 m²)USD 350–650/m² panel-only
- Turnkey chilled warehouse (1,000–5,000 m²)USD 700–1,100/m² incl. plant
- Turnkey frozen warehouse (5,000–20,000 m²)USD 900–1,600/m² incl. plant
Indicative ranges. Actual quotations vary by country, scope, spec, freight and site conditions.
- • Temperature class
- • Panel thickness and skin quality
- • Door count and type
- • Floor construction
- • Local labour and freight
- • Compliance level (GMP, USDA, HALAL)
- • Racking (drive-in, push-back, radio-shuttle, ASRS)
- • Air curtains and high-speed doors
- • In-room lighting DALI control
- • Monitoring and alarm system
- • Level slab within ±3 mm/3 m
- • Vapour barrier under floor
- • Panel-to-floor gasket sealing
- • Roof drainage for outdoor units
- • Chilled: 15–30 kWh/m²/year (electricity)
- • Frozen: 40–90 kWh/m²/year
- • Door heat gain 5–15% of total load
- • Annual joint sealant inspection
- • Door gasket replacement every 3–5 years
- • Panel skin repair after impact damage
- • Refrigeration plant PM quarterly
Before you request quotations
- Define production goals and daily throughput (kg/day)
- Confirm utilities: power (kVA), water, drainage, compressed air
- Define project scope (turnkey vs supply-only vs hybrid)
- Prepare site layout, floor plan and clear height
- Confirm local regulations (F-Gas, ATEX, HACCP, seismic code)
- Determine financing route (own cash, lease, bank loan, ECA)
- Create technical specification with U-values and setpoints
- Prepare RFQ and shortlist qualified international suppliers
Interactive evaluation matrix
Score each shortlisted supplier on the criteria below. All calculations run locally — nothing is sent to our servers.
| Criterion | |||
|---|---|---|---|
Price / Investment Turnkey CAPEX including installation, controls and commissioning. | |||
Warranty (years) Comprehensive, on major components (compressors, PLC, panels). | |||
Lead time (weeks) Ex-works or delivered to site including customs. | |||
Energy efficiency (SEC / COP) Lower SEC or higher COP is better. | |||
Local service & spare parts Response time, service partner in country, stocked spares. | |||
References / installed base Comparable capacity, region and application. | |||
Maintenance program Preventive maintenance plan, remote monitoring. | |||
Operator training On-site training days, documentation, language. | |||
Expandability Add capacity, modules or additional rooms later. | |||
Lifecycle cost (10y) CAPEX + energy + maintenance + refrigerant cost of ownership. | |||
| Total score | 0 / 50 | 0 / 50 | 0 / 50 |
Common questions
PIR or PUR panel?
PIR has better fire behaviour (B-s2,d0), 5–10% higher price and same thermal performance as PUR. Most European projects and insurance-sensitive projects now specify PIR.
How thick should a frozen-room panel be?
150–200 mm PIR/PUR gives U ≈ 0.14–0.18 W/m²K, appropriate for –18 to –25 °C. Thinner panels have short-term CAPEX savings but 20–40% higher lifetime energy cost.
Do I need underfloor heating in a frozen room?
Yes, for rooms below –5 °C. Without it, ground moisture freezes and lifts the slab within a few years.
How long does construction take?
Panel installation: 1–3 weeks per 1,000 m². Full turnkey commissioning: 12–24 weeks including plant, doors, racking and controls.
Continue your planning
Receive structured, comparable quotations from qualified international suppliers — vendor-neutral. Add financing pre-qualification if the project requires equipment leasing, project loan or ECA-backed facility.
FAQ · Multilingual
Cold room procurement: panel thickness, refrigeration, doors, floor, controls and total delivered cost by capacity range.
- What panel thickness for a -25°C freezer?150–200 mm PIR/PUR panels standard for -25°C. 100–120 mm for +2/+4°C chilled.
- PUR, PIR or mineral wool?PIR is the default cold-room panel today — lower flame spread than PUR at similar thermal performance. Mineral wool used where fire code demands EI60/EI120.