Welcome to the Celotex Insulation Blog

Here you will find the latest articles written by our insulation specialists focusing on product developments, building regulations and technical guidance notes.

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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 statement regarding declared lambda:

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Refurbishment can be a technically challenging area. The Celotex Technical Centre speaks to a wide range of customers every day – many of whom are looking for design advice around a refurbishment project.

Whether it is an architect working on a whole building refurbishment or a homeowner who is looking to upgrade the insulation in their own property, there is often a lot of confusion and even fear around topics such as moisture and condensation.

One area that we are often asked about is pitched roof refurbishment. When it is time to renew the roof covering, homeowners are often keen to take the opportunity to increase the thermal comfort of their home – especially if they have lived for many years in a property with little or no roof insulation.

In this blog we will look at some of the challenges of pitched roof insulation, touch upon some frequently asked questions and introduce an exciting new system – Celotex Rafter Gold. Read more »

2016 has been a busy year of change across the UK. Leicester City Football Club conquered all to win the 2015/16 Premier League title and now sitting down in 12th (sorry to any Leicester fans out there reading this, the only way is up!). The United Kingdom has voted to leave the EU and now Great British Bake Off is switching over to Channel 4. Some might argue these things are trivial in life, but to some, they’re important changes.

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Lots of people visit our website every single month and we have over 110,000 Celotex Members’ signed up for access to our innovative digital tools, so it’s important that we let you know about what’s changed. Read more »

Update – IMPORTANT: On 23 June 2017, in view of the focus on components of rainscreen cladding systems, Celotex stopped the supply of Celotex RS5000, pending further clarity.  RS5000 remains suspended. Celotex do not currently supply a solution for buildings over 18 metres.

In December 2017 we identified a compliance issue relating to our calculation and testing of the lambda value of products in our 4000 and 5000 range and the Crown-Bond and Crown-Fix products within Crown Flat Roofing range. Material such as product downloads & specifications is for information only.

On 30 January 2018, Celotex made a further public announcement in relation to the full system testing of RS5000 pursuant to BS8414:2.  The announcement can be read here

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:

Read more

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

Read more

Celotex launches two new innovative products!

At our headquarters in Hadleigh, Suffolk, our growing team of insulation experts pride themselves in manufacturing innovative solutions for a range of applications in the construction industry. Over the past two years, we have introduced exciting new application solutions including Celotex RS5000, a rainscreen cladding product and more recently, in 2015, Celotex CF5000, our full fill cavity wall solution. We are also leading innovators with our services too, introducing the new and improved U-value Calculator as well as thermal bridging models to the Celotex Members Area.

Today, we announce the release of two new additions to our ‘best-in-class’ performance 0.021 W/mK lambda range. Celotex FI5000, a premium performance flooring solution suitable for concrete slab, beam and block, suspended timber and underfloor heating applications PLUS Celotex SL5000, a specialist concrete soffit liner solution. Both with enhanced thermal performance and installation benefits, saving time and money on-site.

So, with the introductions out of the way, let’s tell you a little more about these new product additions.

Read more »