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 Concrete Slab Floors

Celotex PIR rigid insulation is the perfect solution for concrete slab floors as no thermal bridging occurs at floor edges.

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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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Concrete slab floors are perhaps the most common flooring application, with many domestic and non-domestic constructions featuring a concrete slab application installed directly on the building foundations or subsoil. Celotex insulation has a tried and tested product range which is suitable for a range of flooring applications, including concrete slab. 

For excellent dimensional stability specify Celotex products in a concrete slab flooring application. Our easy-to-cut PIR insulation boards will fit into most spaces and offer reliable long term energy savings for buildings and homes.

Application Benefits:

• No thermal bridging at floor edges
• Tightly butted joints for insulation continuity
• Conveniently sized boards for handling indoors
• Enhanced compressive strength of ≥175 kPa with premium performance Celotex FI5000
• The composite facer of Celotex FI5000 features a built-in vapour control layer, enabling direct screed, without the need for an additional separating layer. This saves the installer time and money

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

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