Celotex 50mm GA4050 Insulation Board - 2.4m x 1.2m

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Est. Delivery: 3-5 Working Days
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£19.60 Incl. VAT
£16.33 Ex. VAT
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Product Description

Celotex GA4000 is a multi-purpose insulation board which can be specified for use in a variety of applications such as pitched roofs, flat roofs, solid masonry walls, floors, timber framed & steel framed systems. 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 celotex insulation boards are manufactured from rigid polyisocyanurate (PIR) using a blowing agent that has zero ozone depletion potential (zero ODP) and low global warming potential (GWP).


Length: 2.4m.
Width: 1.2m.
Coverage: 2.88m2.
Thickness: 50mm.
rValue: 2.25m2K/W.
Weight: 1.55kg/m2.
Thermal conductivity: 0.022 W/mk - BS EN 12667.
Compressive strength: ≥140kPa - BS EN 826.
Water vapour resistance: >150MNs/g - BS EN 12086: Method B.
Spread of flame: Class 1 - BS 476-7.


The insulation shall be Celotex GA4000 comprising a polyisocyanurate rigid foam insulation core, with a thermal conductivity of 0.022W/mK and low emissivity aluminium foil facings on both sides. GA4000 is A+ rated when compared to the BRE Green Guide 2008 and is CFC/HCFC free with zero ODP and low GWP.

Celotex GA4000 can be specifed for use in a variety of applications such as pitched roofs, flat roofs, solid masonry walls, floors, timber framed & steel framed systems.

CE marking compliance to BS EN 13165:2001 and manufactured in accordance with quality management systems BS EN ISO 9001:2000 by Celotex Limited. All products must be installed in accordance with instructions issued by Celotex Limited.

GA4000 Specifications

  • Comes in thicknesses ranging from 50 - 100mm, making it the thinnest PIR insulation available, in a standard board size of 1200mm x 2400mm.
  • Is suitable for use in a number of applications including roof, wall and floor systems.
  • 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.


Width 1200mm Length 2400mm Thickness 50mm


Thermal Conductivity 0.022 W/mK Facing Foil Material PIR Product Type Board Edging Square Edge

Frequently Bought Together


Questions & Answers


What is your delivery range ? Is it nationwide?


We can deliver any within the UK mainland. The highland in scotland can sometimes be an issue so I would ask you to contact the team before making an order if you live in the highlands.


on 01752 692 206


Can these boards be fixed onto roof rafters rather than in between. how are they fixed to the roof rafters?


You can mechanically fix these to the rafters using the appropriate fixing/screw.

They are available in different profiles and lengths to suit your build up. If you require further advice, please do not hesitate to get in touch with us via Telephone/email/chat!


Can you confirm the acoustic rating of this product?


This product in particular does not offer any Acoustic performance/benefit. Due to the material it is made from, the boards main focus is to insulate thermally as opposed to providing acoustic performance.

Have a question about this product?

Product Reviews

4.5 / 5 10 reviews
22nd June
This product is pretty good, the aluminium foil is very very thin by the way
Anthony McLeod
18th June
Effective but messy to cut.
Richard Austen
9th April
Easy to use, cuts easily.
Tracey Pope
28th March
spot on fast delivery a great service many thanks
diane cresswell
27th February
Very good product easy to work with. And the driver was very helpful
Helen Bos
15th February
Great stuff used to insulate my Luton Van conversion. The staff were very helpful and professional in all areas of communication.
Peter G
12th November 2019
As specified and in good condition
27th October 2019
Easy to cut and fit perfect for insulating bedroom floor over the garage. Can really feel the difference in the room even without any heating on.
25th October 2019
As described
Andrew Wood
29th September 2019
Excellent product
Product Enquiry Form
Celotex 50mm GA4050 Insulation Board - 2.4m x 1.2m

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