Celotex GA4000 general application board Celotex Insulation

Celotex GA4000

High performance rigid Polyisocyanurate (PIR) general application insulation board.

Suitable for use in a number of applications including roof, wall and floor systems.

Includes low emissivity foil facings giving improved thermal insulation performance within cavity air spaces.

Easy to cut and shape.

Can be used to improve reliable long-term energy savings for buildings.

BBA certified.

Thicknesses and Availability:

Available in most popular thicknesses at most depots; short lead-times may apply if we need to get stock in before delivering to site.

This GA4000 Range includes the following readily available product thicknesses: 50mm, 60mm, 70mm, 75mm, 80mm, 90mm and 100mm.

Product Information

General information about Celotex GA4000

Product Application

General application insulating board

Celotex's high performance polyisocyanurate (PIR) foam board, GA4000, is suitable for use in pitched and flat roofs, solid masonary walls, timber and steel framed systems, and floors.

Product Make-up


Celotex 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).


Faced on both sides with a low emissivity aluminium foil, autohesively bonded to the insulation core during manufacture.

Product Properties

Thickness 50mm to 100mm
Board Length 2.4m
Board Width 1.2m
Board Edge Square

Product Prices

Buy Celotex GA4000

Product ex-VAT inc-VAT
Celotex GA4050 50mm, 1.2x2.4m = 2.88m² £20.47 £24.56
Celotex GA4060 60mm, 1.2x2.4m = 2.88m² £25.35 £30.42
Celotex GA4070 70mm, 1.2x2.4m = 2.88m² £30.42 £36.50
Celotex GA4075 75mm, 1.2x2.4m = 2.88m² £30.23 £36.27
Celotex GA4080 80mm, 1.2x2.4m = 2.88m² £33.97 £40.76
Celotex GA4090 90mm, 1.2x2.4m = 2.88m² £37.51 £45.01
Celotex GA4100 100mm, 1.2x2.4m = 2.88m² £37.70 £45.24
Aluminium Foil Tape 100mm x 50m = 50lm £9.04 £10.84

Reasonable stock levels are generally held at most of our depots. In some geographic locations, depots may stock alternates, however, we will contact you to discuss before proceeding with the order.

Where products need to be brought in from Celotex, please allow approx. 1 week for delivery.

  • Generally 1 or 3 working days for delivery
  • Generally 1 to 5 working days for delivery
  • Generally 5 to 10 working days for delivery
  • Special request or made to order item, allow extended lead times. Minimum order levels may apply.
  • Please call to check availability and approximate lead times

Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations

Product Performance and Guides

Product Performance, Manufacturer Downloads, and Installation Guides

Product Performance

Thermal Conductivity 0.022 W/mK
Compressive Strength 140 kPa at 10% compression BS EN 826:2013
Vapour Resistance > 300 MNs/gm
Product Thickness Thermal Resistance kg/m²
Celotex GA4050 50mm 2.25 m²K/W 1.92 kg/m²
Celotex GA4060 60mm 2.70 m²K/W 2.26 kg/m²
Celotex GA4070 70mm 3.15 m²K/W 2.61 kg/m²
Celotex GA4075 75mm 3.40 m²K/W 2.78 kg/m²
Celotex GA4080 80mm 3.60 m²K/W 2.96 kg/m²
Celotex GA4090 90mm 4.05 m²K/W 3.31 kg/m²
Celotex GA4100 100mm 4.50 m²K/W 4.15 kg/m²

Product Certificates

Please visit the Celotex website for product certificates.