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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Category Archives: Technical


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.

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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 »

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

Read More here

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.

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 »

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

Since Late 2014 Celotex has launched several cutting edge products to the market. A prime example of an innovative product launched just recently, would be the Celotex FI5000 flooring Insulation, which offers a whole host of on site benefits for the installer, saving time & money. With every Celotex product launch, we always drive to understand our customers’ needs, investing the time to design insulation products that the market place is driving towards. New concrete soffit liner solution, Celotex SL5000 is another perfect example.

What is concrete soffit liner insulation?

Celotex SL5000 has redefined the approach to insulating concrete soffits.

Read more »

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