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20mm Celotex TB4000 PIR Insulation Board - TB4020

20mm Celotex TB4000 PIR Insulation Board - TB4020
20mm Celotex TB4000 PIR Insulation Board - TB4020
Guide Price: £25.83 (£31.00 inc VAT)
Price per m2: £8.97/m2 (£10.76 inc VAT)
  • Product Code: A1-111
  • Delivery Time: 1-3 working days
  • Brand: Celotex
  • (tech. support: 01473820850)
  • Model and Size: 1200x2400mm - 2.88m2
  • Weight: 2.42kg
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20mm Celotex TB4000 PIR Insulation Board - TB4020

Width: 1200mm
Length: 2400mm
Coverage: 2.88m2
Density: 42kg/m3
Weight of 1m2: 0.84kg
Weight: 2.42kg
Compressive Strength: 120kPa
Thermal Conductivity: 0.023W/mK
R-Value: 0.9m2K/W

Celotex TB4020 is targeted at cut-to-fit applications between rafters or joists and enables users to achieve lower U-values with a single layer of insulation than has previously been possible. TB4012 is also appropriate for use in floors and walls. With low emissivity foil facings, TB4012 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).


  • Would also be known as TB3012 from January 2018.


  • Pitched Roofs
  • Flat Roofs
  • Solid Masonry Walls
  • Timber Framed & Steel Framed Systems
  • Floors
  • Specifically designed to eliminate thermal bridges
  • The thinnest PIR insulation
  • Standard board size of 1200mm x 2400mm
  • Easy to cut and shape
  • Low emissivity foil facings giving improved thermal insulation
  • High performance within cavity air spaces
  • Long-term energy savings for buildings
  • CE marking compliance to BS EN 13165
  • Manufactured in accordance with quality management system ISO 9001 and environmental management system ISO 14001
  • Achieves an A+ rating when compared to the BRE Green Guide 2008