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Recticel Eurothane GP PIR Insulation Board — Underfloor

Eurothane GP is a general purpose rigid polyisocyanurate (PIR) closed cell foam board, faced on both sides with a multi-layer coated aluminium foil.

It has an exceptionally low thermal conductivity of 0.022 W/mK. It does not degrade if exposed to moisture, is rot-proof and the boards have a high resistance to the passage of moisture vapour so reduce the risk of condensation.

Board size is 2400 x 1200mm, available in eight thicknesses from 25mm to 120mm.

Key Features
  • Eurothane GP is CFC and HCFC-free, i.e. zero ozone depletion potential (ODP)
  • Pentane-blown  polyisocyanurate foam
    • Global Warning Potential (GWP) rating of <5
    • Overall 'A' rating in Green Specification Guide
  • Lightweight and easy to cut
  • Rot-proof, does not degrade if exposed to moisture
  • High compressive strength — 140kPa
Scope of Use

Eurothane GP PIR is suitable for use in any type of residential, commercial or industrial building and can be used for both new builds and retrofit projects.

As underfloor insulation it is well suited for use:

  • As in-ground under slab insulation
  • Insulating on top of the slab
  • Insulating timber floors
  • Insulating intermediate floors
  • With underfloor heating systems
  • As slab edges insulation or room perimeters
  • Under floating timber floors
Limitations on Use
  • Eurothane GP should be covered with a thin damp-proof membrane before wet concrete is laid over the insulation
  • Must be used in accordance with the supplier Installation Guide
Statement of Building Code Compliance

Eurothane GP PIR will, if employed in accordance with the supplier’s installation requirements, satisfy the following clauses of the Building Code:

  • B2 Durability: Performance B2.3.1(a)
  • C2 Prevention of Fire Occurring: C.VM2, A1.7
  • E3 Internal Moisture: Performance E3.3.1
  • F2 Hazardous Building Materials: Performance F2.3.1
  • H1 Energy Efficiency: Performance H1.3.1(a), H1.3.2E
Other Performance Attributes
  • Rot-proof, does not degrade if exposed to moisture
  • High compressive strength — 140kPa


Board size 2400 x1200mm
Thickness: R-Value:
25mm 1.10
40mm 1.80
50mm 2.25
60mm 2.70
70mm 3.15
75mm 3.40
90mm 4.05
120mm 5.45

Environmental Information

  • Eurothane GP is CFC and HCFC-free, i.e. zero ozone depletion potential (ODP)
  • It is a pentane-blown polyisocyanurate foam which results in a global warming potential (GWP) of below 5 and an overall 'A' Rating in the Green Specification Guide
  • ISO-14001-2015 Certified
Data Sheet: Recticel Eurothane GP
Test Results
Test Results
Installation Guide
Additional Information
FAQs: Insulation

The Alternative Energy Company is the New Zealand supplier of solar thermodynamic hot water systems made by Energie (Portugal), and Eurothane GP PIR insulation panels made by Recticel (UK).

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