Celotex Underfloor Heating Insulation Board FI5125 125mm - 25.92m2

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Product Description

Celotex FI5000 is our premium performance PIR solution for floors. Through ongoing product innovation and breakthrough design, FI5000 represents pioneering progression within the PIR market offering a flooring insulation board with enhanced thermal performance as well as an A rating when compared to the BRE Green Guide and an innovative cement compatible composite facer with a built-in VCL. Suitable for concrete slab, beam and block, suspended timber and underfloor heating flooring applications.

Celotex FI5000 is manufactured from rigid polyisocyanurate (PIR) using a blowing agent that has zero ozone depletion potential (ODP) and a low global warming potential (GWP).


Length: 2.4m.
Width: 1.2m.
Board coverage: 2.88m2.
Pack quantity: 9x boards.
Pack coverage: 25.92m2.
Thickness: 125mm.
rValue: 5.95m2K/W.
Weight: 5.28kg/m2.
Thermal conductivity: 0.021 W/mk - BS EN 12667.
Compressive strength: ≥175kPa - BS EN 826.
Facings: low emissivity foil facers.


Celotex FI5000 is designed for use in the following flooring applications:

  • Concrete slab.
  • Beam and block.
  • Suspended timber.
  • Underfloor heating.

FI5000 specifications

The insulation shall be Celotex FI5000 comprising a polyisocyanurate rigid foam insulation core with a thermal conductivity of 0.021 W/mK with a composite facer on both sides. Celotex FI5000 is CFC/HCFC free with zero ODP and low GWP and CE marking compliance to BS EN 13165. Celotex FI5000 is manufactured in accordance with quality management system ISO 9001 and environmental management system.

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Width 1200mm Length 2400mm Thickness 125mm


Thermal Conductivity 0.021 W/mK Facing Foil Product Type Board Material PIR Edging Square Edge

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Celotex Underfloor Heating Insulation Board FI5125 125mm - 25.92m2

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