Celotex TB4000 Multi-Purpose Insulation Board - 1200mm x 2400mm x 12mm

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up to 60 working days
1+   £12.18

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Our price today, excluding delivery and VAT is

£14.62 inc. VAT £12.18

Product Notice

Due to potential shortages of manufacturer stock, there may be a longer than average lead time on these products, up to 2 weeks. Please call the Roofinglines Customer Service team to check availability in your area.



  • High performance PIR insulation boards
  • Specifically designed to eliminate thermal bridging
  • Ideal for use in 2 layer build-ups, including between and under rafters, and over stud in timber frame wall lining applications
  • Low emissivity foil facings - enhanced thermal performance within cavity air spaces
  • Achieves an A+ rating when compared to the BRE Green Guide
  • Certified under BBA certificate number 95/3197 and 09/4667
  • Zero ozone depletion potential (zero ODP) and a low global warming impact (GWP)
  • Future proofs the energy performance of new and existing buildings


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

  • Beam and block floors
  • Between and over rafters
  • Between and under rafters
  • Between and under joists
  • Concrete slab floors
  • Garage conversions
  • Loft conversions
  • Pitched roof sarking
  • Timber frame wall lining
  • Steel stud frame walls
  • Single timber frame wall lining
  • Timber frame walls sheathing

Product Specification

Application Multi-purpose
Brand Celotex
Compressive Strength >=120kPa
Dimensional Stability DS(TH)8
Length 2400mm
Product Type Insulation boards
R-Value 0.50m²K/W
Surface Spread of Flame Class 1
Thermal Conductivity 0.022W/mK
Thickness 12mm
Water Vapour Resistance >150 MNs/g
Weight 0.50kg/m²
Width 1200mm

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Customer Reviews

01 January 2016
Internal Insulation of Office External Solid Walls. Utilising Warm Batten Method. DIY Project. Good Quality Product