Important Information: For all updates and Celotex announcements since June 2017, please see the links below...  See more

Declared lambda values - Read more >

5000 Class 0 testing - Read more >

Rainscreen cladding & RS5000 - Read more >

Insulation for Suspended Timber Floors

Specifying Celotex PIR insulation is quick and easy to cut and ensures no thermal bridging occurs at floor gaps making it the ideal flooring insulation solution for suspended timber floors

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IMPORTANT: On 1 September 2017, Celotex took the precautionary measure to temporarily suspend the supply of Celotex FR5000, Celotex CG5000, Celotex CF5000 and Celotex SL5000 while we investigate the results of recent tests (Parts 6 and 7 of British Standard 476). In addition, we have recently identified a compliance issue relating to our calculation and testing of the declared lambda value of products in the 4000 and 5000 ranges and the Crown-Bond and Crown-Fix products within the Crown Flat Roofing range. Due to this issue, the suspension of the 5000 range will continue and now includes the FI5000 and GD5000 products. Materials relating to the 5000 range products are for information only.  Please note that all products in the TB4000, GA4000 below 100mm, PL4000 and CW4000 ranges manufactured after 15 December 2017 will be marketed from January as Celotex 3000 with a declared lambda value of 0.023 W/mK.

Please use the link below to read our full statements regarding declared lambda:

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Typically, Suspended timber floors consist of timber floorboards attached to flooring joists which are then 'suspended' above building foundations. Celotex suspended timber flooring insulation solutions are ideal for minimising air leakage and heat loss. This is achieved by friction fitting the insulation, with the boards permanently retained by Celotex insulation clips. Installing Celotex insulation in a suspended timber floor application will provide long term energy savings for buildings.

Application Benefits:

  • Insulation quick and easy to install between joists in one layer
  • Minimal load added to the structure due to incredibly light-weight boards
  • No thermal bridging at floor gaps
  • Provides reliable long term energy savings for buildings

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Recommended Products

FI5000 (Currently Suspended)
1200 x 2400mm
(Currently Suspended) 75 - 125mm
0.021 W/mK

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1200 x 2400mm
0.022 W/mK

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