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The Recticel Eurothane GP PIR insulation board is a high‑performance, versatile solution for floors, walls, roofs, ceilings and dormer cheeks. With a rigid PIR foam core and foil facings on both sides, Eurothane GP provides outstanding thermal performance (λ ≈ 0.022 W/m·K) and is suitable for both new build and retrofit applications.
Eurothane GP boards are designed for multi‑application use — pitched roofs, framed walls, concrete floors, and ceilings. The foil facings provide radiant heat reflection and act as an integral vapour control layer in many cases. Their low thermal conductivity enables slim build‑up designs, helping you hit U‑value targets without excessive thickness.
Thanks to the low λ‑value, Eurothane GP allows achieving excellent U‑values with thinner insulation layers compared with mineral wool or EPS. Its compressive strength ensures suitability for structural floor or flat‑roof load areas. The foil facings also help reduce radiant heat loss and provide vapour control benefits, particularly when joints are sealed.
For installations with underfloor heating, Eurothane GP supports efficient heat flow from the heating source upward into the occupied space, reducing downward thermal losses. In higher humidity or flat roof zones, additional vapour control per BS 5250 may still be required.
For a solid ground slab, you’d typically need a thickness that allows you to achieve your target U‑value while supporting the live load. Eurothane GP boards in the 75–120 mm range are commonly used, thanks to their ~140 kPa compressive strength and 0.022 W/m·K conductivity. Always check your structural and thermal design requirements.
Yes — Eurothane GP is suitable for retrofit as well as new build. Its slim thickness build‑up enables upgrades to walls, roofs or floors without overly compromising internal dimensions. Ensure proper detailing especially at junctions and thermal bridges.
Since one board (1200 x 2400 mm) covers about 2.88 m², for a 48 m² area you’d need: 48 ÷ 2.88 ≈ 16.7 boards. Round up to 17 boards and add ~5‑10% extra for waste around penetrations, hips, ridges and cuts.
Eurothane GP is classified as Euroclass F under EN 13501‑1 for reaction to fire. It meets Class 1 surface spread of flame test (BS 476‑7) in many installations. Despite its classification, when installed correctly inside tested build‑up systems behind plasterboard, its performance is widely accepted for domestic and commercial use.
The foil facing on Eurothane GP acts as a very effective vapour resistance layer in many internal wall or ceiling applications. However, in high‑humidity zones (such as bathrooms, basements or flat roofs) a separate vapour control layer (VCL) may still be required for full compliance with building moisture control standards.
Due to its low thermal conductivity of 0.022 W/m·K, Eurothane GP achieves the same or better U‑values at significantly reduced thickness compared with mineral wool or EPS. This is beneficial where ceiling heights, floor levels or roof space are constrained.
Yes. The board is manufactured with zero ozone‑depletion potential (ODP) and very low global warming potential (GWP). Its excellent thermal performance helps reduce operational carbon emissions across the lifespan of the building, making it suitable for projects targeting sustainability certifications and low‑energy standards.
| Specification | Value / Range |
|---|---|
| Board Dimensions | 1200 mm × 2400 mm |
| Thickness Options | 25 mm – 160 mm (varies by type) :contentReference[oaicite:9]{index=9} |
| Thermal Conductivity (λ) | 0.022 W/m·K (typical) |
| Compressive Strength | ≥120 kPa (< 50mm) / ≥140 kPa (50‑160mm) |
| Density (core) | ≈ 30 kg/m³ |
| Facing | Multilayer foil on both sides |
| Fire Performance / Reaction to Fire | Euroclass F (EN 13501‑1) |
| Application Areas | Floors, walls, ceilings, pitched roofs, dormer cheeks |
