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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Latest articles written by our insulation experts


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 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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Underfloor heating is now becoming an increasingly popular method for homeowners wanting to improve the insulation of their home. Not only does underfloor heating provide consistent background heat – the application can also eliminate the requirement for radiators and in turn reduce heating bills. Read more »

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). Materials relating to these products are for information only.

Read More here

Cavity Wall (brick/block) is the predominant Build method for the UK housing industry with 70% of 27.4 million homes built with cavity walls.
The change to Part L1a in 2013 (which sets the guidelines for new residential house builds) brought a second compliance metric, Fabric Energy Efficiency Standard (FEES). Read more »

There are many specification considerations for flat roof design for both performance and aesthetic requirements of the roof. This list represents most commonly asked enquiries from flat roof designers and specifiers; topics include roofing interfaces, compatibility with other roofing products and how to make savings in the rainwater drainage systems. Read more »

PIR insulation specialist, Celotex, is to return to Ecobuild for the fifth year running. The company will once again make a lasting impression with an even bigger and better stand at C143, which will host engaging seminars, launch (and demonstrate) a brand new product as well as providing all the tools, technical expertise and support that you have come to expect and rely on from the brand. Read more »

Increasing thermal performance is always a high priority for homeowners when looking to upgrade the insulation of their pitched roof.

As well as adding comfort to your home, a well-insulated roof increases property value (when seeking to create an additional room), significantly reduces heating bills and most importantly provides a warm, airtight space without the need for additional pipework.

To ensure you get specification right and achieve the desired results from your roof refurbishment, here are our top 7 considerations: Read more »

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 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

With the shortlist for the recent BBC Sports Personality of the Year Award dominated by Olympians many people will think back to their favourite Olympics with great sporting achievements from the likes of Sir Steve Redgrave on the rowing lakes, Sir Chris Hoy in the velodromes or Denise Lewis OBE in the heptathlon competition.

My favourite Olympics is the 1992 games in Spain not only did Freddie Mercury and Montserrat Caballe’s brilliant ‘Barcelona’ feature in television coverage but Britain’s Linford Christie won the marquee event of the men’s 100m final in a time of 9.96 seconds. Improvements in sports science and training methods have helped subsequent 100m Olympic champions better this time with Usain Bolt posting an incredible 9.69 seconds at the Beijing Olympics.

The need to ‘go faster’ has not only dominated the world of athletics but has also been seen in the construction industry. The rise in popularity of timber frame houses and off site construction pays testament to this trend for improving the speed of builds.How to insulate your attic wall? Things to consider.

Which plasterboard insulation would you recommend?

To assist with this need for speed and efficiency Celotex brought to the market insulated plasterboards Celotex PL4000 and more recently GD5000. Both options feature insulation bonded to 12.5mm plasterboards to form a composite product suitable to either mechanically fix or dot and dab depending on your application.

The benefits of plasterboard insulation

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An R-value is the resistance value of particular components in construction and includes materials such as plasterboard, brick or insulation. It tells you how well these components insulate against heat and is determined by thickness. Adding them all together gives you an understanding of how well the construction will stop the heat escaping.