Both deliver excellent thermal insulation, but PIR has an upgraded chemistry: it earns a Class B1 fire rating and, under flame, forms a stable surface char with reduced smoke rather than softening as quickly as standard PU. Choose PIR when you need insulation plus a higher fire classification.

The PIR core reaches Class B1. We supply third-party test reports to EN 13501-1, ASTM E84 and BS 476, plus ISO 9001 and CE. If the project demands a fully A-grade non-combustible wall, we recommend a rock wool or MgO core instead.

PIR offers a thermal conductivity of around λ ≈ 0.022–0.023 W/(m·K), close to PU and well ahead of mineral cores. Thinner PIR panels can match the insulation of much thicker rock wool, saving space and reducing the running cost of cold or temperature-controlled rooms.

Yes. The closed-cell PIR core is a moisture and vapour barrier, and tongue-and-groove or cam-lock joints seal each junction. Installed with sealed joints and a continuous vapour barrier, the system controls condensation in chilled and humidity-controlled spaces.

Standard is top-brand pre-painted steel (stainless available) in RAL or custom colors, made to ≤ 2 mm/2 m flatness. A single project uses the same steel coil batch for color consistency; large multi-batch orders are color-matched with the mill or zoned by area.

Sample/small orders typically ship in 10–15 days and a full container in about 20–25 days from Shanghai. Steel gauge, color, thickness and certificates are made to order — send your panel schedule and we will confirm exact MOQ, lead time and FOB/CIF/DDP pricing.