PIR insulated panel
Optimal insulation – better fire performance – energy saving.
PIR insulated panel
The PIR panel uses a polyisocyanurate core — an upgrade on PU with a more thermally stable closed-cell structure. It has the lowest thermal conductivity of any of our panels and better fire performance, which suits cold stores and cleanrooms.
The lowest thermal conductivity
Maximum energy saving
Better fire performance than PU
Dimensionally stable across temperatures
Fast to install – cost-efficient
Key advantages
Optimal insulation
The lowest λ of any of our panels, holding deep sub-zero temperatures steady in a cold store.
Energy saving
Cuts the cooling load significantly and shortens the payback on the refrigeration plant.
Better fire performance
PIR chars into an insulating layer when it burns, so flame spreads less than with PU.
Fast installation
A tongue-and-groove design that is light, quick to install and shortens the build schedule.
Durable & corrosion-resistant
High-grade coated steel that resists rust and stands up to harsh environments.
High aesthetic quality
A flat surface in a wide range of colors, easy to clean and maintain.
Technical specifications
| Core material | PIR (polyisocyanurate) — A PIR core resists flame spread better than PU |
|---|---|
| Exterior finish | Steel / stainless steel / aluminium / plain foil — 0.40 – 0.80 mm thick |
| Core density | PIR: 45 ± 3 kg/m³ — Per the 2026 catalogue |
| Core thickness – interior wall panel | 40, 50, 75, 100, 125, 150, 200 mm |
| Core thickness – exterior wall panel | 50, 75, 100 mm |
| Effective width / product width – interior wall | 1,130 / 1,152 mm — Tolerance ±2 mm |
| Effective width / product width – exterior wall | 1,000 / 1,050 mm — Tolerance ±2 mm |
| Maximum length | 18,000 mm |
| Reaction-to-fire test results | Class B2 to DIN 4102-1 — IBST test report — see the Certificates section |
| Standard steel colors | Red, blue, moss green, jade green, milky white, cream yellow, wood grain — 7 colors from the catalogue color chart |
Outer steel facingGalvanized steel / PPGL / stainless steel, 0.3–0.8 mm thick, flat surface, color-fast and corrosion-resistant.
PIR insulation coreClosed-cell polyisocyanurate: thermally stable and keeps its insulating performance deep below zero.
Inner steel facingGalvanized steel / PPGL, 0.3–0.8 mm thick, flat surface, easy to clean.
Standard steel color chart
- Red Red
- Blue Blue
- Moss green Moss green
- Jade green Turquoise
- Milky white White
- Cream yellow Ivory
- Wood grain Wood grain
Beyond the standard chart, Phu Son will produce to a project's own color code on large orders.
In use on site
Cold storage – Storage warehouses
Holds temperature and protects stored goods
Cleanroom
For clean, sterile environments
Food factories
Meets food hygiene and safety requirements
Production facility
Factory walls, ceilings and roofs
Specifications & options
- Interior wall panel: 40/50/75/100/125/150/200 mm thick - effective width 1,130 mm (product width 1,152 mm)
- Exterior wall panel: 50/75/100 mm thick - effective width 1,000 mm (product width 1,050 mm)
- Maximum length: 18,000 mm
- Facing: plain steel / stainless steel / aluminium / foil, 0.40 – 0.80 mm thick
- Standard colors: red, blue, moss green, jade green, milky white, cream yellow, wood grain
- Source: Phu Son Group 2026 Catalogue
Related accessories
- U-shaped aluminium profile
- External corner aluminium profile
- Panel joint trim
- Joint sealant silicone
- Self-drilling screws
Frequently asked questions
- PU vs PIR panels: insulation value, fire performance and cost
- What is a PU/PIR insulated panel? Its build-up, advantages and use in modern construction
- Fire-rated panels: fire resistance ratings, approval submissions and installation notes
- What to watch when choosing panel thickness and installing correctly
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Quick consultation – get the right solution
Phu Son Group's engineering team is ready to advise you and turn around a quote quickly.