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 statement regarding declared lambda:

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Please use the link below to read our latest statement regarding Class 0:

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This post will cover what perimeter upstand insulation is and how it works in solid floor constructions.

History, music and comedy have given us many great double acts through the years whether it’s the Wright brothers breaking ground in aviation, Lennon & McCartney’s songwriting prowess or Del Boy & Rodney’s classic comedy moments. All of these pairs go hand in hand and undoubtedly wouldn’t have had the same impact on the world we know today if they had not have come to work together.

Another, famous double act in the world of Flooring……by Celotex is Celotex FI5000 and its partner Celotex US4000.

What is perimeter upstand insulation in solid floor constructions?Find out about Celotex' bespoke perimeter upstand for use with flooring insulation Celotex FI5000

The use of perimeter upstand insulation is key to stopping heat escaping through the edge of the screed or concrete oversite in solid floor constructionsCelotex US4025 is used as the vertical perimeter upstand insulation when Celotex FI5000 is used on the main floor area. 

The Celotex FI5000/US4025 double act combines to offer a new approach to insulating solid floors by eliminating the need for an additional separating layer prior to screeding or concreting on top of the insulation.

DSC_3036By eliminating the separating layer a contractor can typically lay 300m2 of Celotex FI5000 a day. This can be achieved simply by butting the board joints in a break bonded manner and taping these joints prior to screeding.

Celotex US4025 offers a thermal conductivity of 0.022 W/mK and a thermal resistance of 1.10 m2K/W. Additionally, Celotex US4025 features zero ozone depletion potential and low global warming potential.

So to summarize, the double act of Celotex FI5000 and Celotex US4025 allows Flooring …by Celotex to offer an innovative high performance alternative to insulating solid floors.

Find out more about Celotex FI5000 and Celotex US4025 here, or find out where you can get hold of them by checking your local stockist.