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Celotex TB4030 General Purpose PIR Insulation Board - 2400 X 1200 X 30mm

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Product Description

Celotex TB4000 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. Developed to provide simple solutions for overcoming localised thermal bridges.

With low emissivity foil facings, TB4000 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). Our 12mm product positions Celotex as the manufacturer of the broadest range of product thicknesses, from 12mm to 200mm.


Length: 2.4m.
Width: 1.2m.
Coverage: 2.88m2.
Thickness: 30mm.
Weight: 0.98kg/m2.
Thermal conductivity: 0.022 W/mk - BS EN 12667.
Compressive strength: ≥120kPa - 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 TB4000 comprising a polyisocyanurate rigid foam insulation core, with a thermal conductivity of 0.022W/mK and low emissivity aluminium foil facings on both sides. TB4000 is A+ rated when compared to the BRE Green Guide 2008 and is CFC/HCFC free with zero ODP and low GWP.

Celotex TB4000 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.

TB4000 Specifications

  • Is specifically designed to eliminate thermal bridges.
  • Comes in thicknesses ranging from 12 - 45mm, 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 30mm


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

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Questions & Answers


Will this product require a breather membrane when installed in a stud wall?


This product will require a breather membrane if it is for an external stud wall. 

It will not if it is for an internal stud partition wall. 

Have a question about this product?

Product Reviews

5 / 5 9 reviews
17th May 2021
Good quality
Brendan Orourke
20th February 2021
Great quality
Rob Schwab
21st December 2020
Excellent product. The same as the 'King' of boards and way, way cheaper.
Duncan Edgar
3rd November 2020
Very easy to use and does the job that it’s supposed to.
2nd September 2020
Good product and service
David Gibbons
7th August 2020
Easy to work with and very efficient. Great stuff
clive newby
24th July 2020
Easy to work with
22nd March 2020
Good quality easy to use
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Celotex TB4030 General Purpose PIR Insulation Board - 2400 X 1200 X 30mm

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