Celotex Isover

Celotex GA4000

Celotex GA4000 is a high performance, easy to install polyisocyanurate (PIR) insulation board featuring a low emissivity foil facing. Available in thicknesses from 50mm to 100mm, it can be considered for roof, wall and floor applications.

Product Image
U-value Calculator
Start your U-value calculation >
Use the calculator

Applications

  • Ground Floor - Concrete Slab
  • Ground Floor - Suspended Timber Joist
  • Ground Floor - Beam and Block
  • Ground Floor - Upgrading Existing Concrete Slab
  • External Wall - Timber Frame Internal Linings
  • External Wall - Timber Frame Sheathing
  • External Wall - Between Timber Frame Studs
  • External Wall - Solid Masonry Internal Linings
  • Pitched Roof - Over Timber Rafters
  • Pitched Roof - Sarking
  • Pitched Roof - Below Timber Rafters
  • Pitched Roof - Between Timber Rafters
  • Pitched Roof - Loft insulation - Between and Over Timber Joists
  • Flat Roof - Balconies & Terraces Over Joists
  • Flat Roof - Between Timber Joists
  • Flat Roof - Below Timber Joists

Product Features

  • Lightweight 2400 x 1200mm boards
  • Low emissivity foil facing
  • Achieves a BRE Green Guide A rating
  • BBA approved – certificates 16/5352, 17/5405

Product Properties

  • Board / Roll size: Width 1200mm, Length 2400mm
  • Thickness : 50-100mm
  • Material: PIR

Product Performance

  • Lambda: 0.022 W/m.K
  • Reaction to Fire: Euroclass E Reaction to Fire classification, according to BS EN 13501-1

Product Benefits

  • Excellent thermal performance - decreasing the thickness of insulation required to hit the required U-value, optimising space in the construction design and helping to reduce the heating and cooling costs within the building
  • Low emissivity foil facing provides improved thermal performance in sealed cavity air spaces, improving the achievable U-value
  • Easy to install – lightweight boards are straightforward to handle, fit and transport
  • BBA certification - third-party verification that the product has been assessed for its defined applications and is compliant with the relevant Building Regulations.