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A general purpose insulation board for floors, walls and roofs. With low emissivity foil facings, GA4000 is manufactured from rigid polyisocyanurate (PIR) using a blowing agent that has zero ozone depletion potential (zero ODP) and low global warming potential (GWP).

Range features:

  • Is suitable for use in a number of applications including roof, wall and floor systems.
  • Is certified under BBA certificate numbers 17/5405 and 16/5352.
  • Includes low emissivity foil facings giving improved thermal insulation performance within cavity air spaces.
  • Is easy to cut and shape.
  • Can be used to improve reliable long-term energy savings for buildings.

Manufactured in accordance with Quality Management System ISO 9001 and Environmental Management System ISO 14001.

Standard product features

Board size:

1200 x 2400 mm.

Compressive strength to BS EN 826:

≥ 140 kPa.

Dimensional stability to BS EN 1604:

DS (70,90)3 - DS(-20,-)1.

Surface spread of flame to BS 476-7:

Class 1.

Reaction to fire to BS EN 13501-1:2007+A1:2009:

Euroclass E.

Thermal conductivity to BS EN 12667:

0.022 W/mK.


Foil faced both sides.

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-45-65/430 Polyisocyanurate (PIR) foam board

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying





+44 (0)1473 822093

Product reference

Celotex GA4000


50 mm thick, R-value 2.25 m²K/W. Weight 1.92 kg/m².
60 mm thick, R-value 2.70 m²K/W. Weight 2.26 kg/m².
70 mm thick, R-value 3.15 m²K/W. Weight 2.61 kg/m².
75 mm thick, R-value 3.40 m²K/W. Weight 2.78 kg/m².
80 mm thick, R-value 3.60 m²K/W. Weight 2.96 kg/m².
90 mm thick, R-value 4.05 m²K/W. Weight 3.31 kg/m².
100 mm thick, R-value 4.50 m²K/W. Weight 4.15 kg/m².

Manufacturer details

Lady Lane Industrial Estate,
Suffolk, IP7 6BA
Tel +44 (0)1473 822093
Fax +44 (0)1473 820880
NBS Plus
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