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Insulation Express

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Celotex GA4000 Insulation Board
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Celotex GA4000 Insulation Board

Celotex GA4000 is a general purpose insulation board for floors, walls and roofs. It has long been at the heart of the Celotex product range providing the user with a range of thermal insulation solutions.

With low emissivity foil facings, GA4000 is manufactured from rigid polyisocyanurate (PIR) using a blend of blowing agents that have zero ozone depletion potential (zero ODP) and low global warming potential (GWP).

With Celotex GA4000 you are specifying an insulation board that:

  • Is suitable for use in a number of applications including roof, wall and floor systems
  • Comes in thicknesses ranging from 50mm-100mm
  • Is easy to cut and shape
  • Includes low emissivity foil facings giving improved thermal insulation performance within cavity air spaces
  • Provides reliable long-term energy savings for buildings
  • Is available in a standard board size of 1200mm x 2400mm


  • Pitched Roofs
  • Flat Roofs
  • Solid Masonry Walls
  • Timber Framed & Steel Framed systems
  • Floors

Need a different size?  

12mm - 45mm  Celotex TB4000

50mm - 100mm Celotex GA4000

110mm - 200mm Celotex XR4000

from £19.08 inc VAT

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