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Celotex GA4050 General Purpose PIR Insulation Board - 2400 X 1200 X 50mm

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£28.45 Incl. VAT
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Celotex GA4050 is a multi-purpose insulation board which is suitable for use in a variety of applications such as pitched roofs, flat roofs, solid masonry walls, floors and timber framed and steel framed systems. Equipped with low emissivity foil facing, it's manufactured from rigid polyisocyanurate (PIR) and easy to cut and shape. Thanks to the excellent thermal performance, as demonstrated by a thermal conductivity of 0.022 W/m.K, this insulation board is able to hit the target U-value with reduced thickness.

What's more, the low emissivity foil facing provides improved thermal performance in sealed cavity air spaces, improving the potential U-value. The GA4050 has been certified by the BBA (British Board of Agrement) as fit for use in defined roof, wall and floor applications when installed, used and maintained as set out in the certificate, giving you peace of mind. Additionally, it has earnt a BRE (Building Research Establishment) Green Guide Rating of A, which can help your environmental performance in your BREEAM (Building Research Establishment's Environmental Assessment Method assessments, making it a valuable asset.

Features & Benefits: Celotex GA4050 General Purpose PIR Insulation Board - 2400 X 1200 X 50mm

  • High-quality PIR insulation board
  • Excellent thermal performance & reduced thickness
  • Low emissivity foil facings for improved thermal insulation performance in cavity air spaces
  • Can be used in floor, roof and wall applications
  • Lightweight, rigid and easy to install
  • BBA certified
  • BRE Green Guide Rating of A for sustainability
  • R-Value: 2.25m2K/W
  • Maximum weight: 1.92kg/m2
  • Compressive strength (kPa): CS(10\Y)140

Standards & Certification

  • Thermal conductivity: 0.022W/mK, according to BS EN 13165 for factory made rigid polyurethane foam (PU) product
  • Spread of flame: Euroclass E Reaction to Fire classification, according to BS EN 13501-1. Products with this level of classification are not provided with a rating for smoke emission.


Length 2400mm Thickness 50mm Width 1200mm


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

Questions & Answers


How many boards per pack?


This is sold per board rather than as a pack. 


Can I fix this to the inside of my attic ceiling, i.e. in a bedroom, without additional plasterwork over the surface? Do you supply screws for this? How many would I need per panel? What is the weight of each panel?


If fixing to a ceiling, ideally you'd fix plasterboard back over this, the product is the same facing either side so you can fit either side. Sadly we do not provide a specific screw for ceiling securement but there isn't a reccomended amount for each panel, this is at the installers discretion. This panel weighs approximately 5.53KG each. 


Can i use instead of osb board for shed floor


This is not intended to be a final finish product so you must put a form of timber over this, OSB would be fine. 


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?


5 / 5 33 reviews
Mrs Fuller
7th June
Super good Insulation
angie baldwin
4th May
Perfect for us for our log cabin
19th April
Very easy to cut and very little mess.
Ms Della Williams
23rd March
Good quality material.
Mr Philip Hadnutt
10th March
Very good sheets and good delivery 😊 driver helpful
20th February
Product was substituted to recticel but is same standard of insulation.
Hope Randall-Mackay
16th February
Great price and product
Sean Breakspear
10th February
Very good service, will be using again.
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Celotex GA4050 General Purpose PIR Insulation Board - 2400 X 1200 X 50mm

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