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

BREEAM is a recognised assessment methodology used to determine how sustainable and energy efficient a commercial building is across nine different sustainability measures. It is one of the world’s leading sustainability assessment methods created as a cost-effective means of bringing sustainable value to a development. As a scheme it rewards efforts to engage in sustainability from concept through to post completion and monitoring how a building is used / performs in reality. It seeks to influence thoughts, intentions, plans and designs of projects at every RIBA stage.

The scheme helps investors, developers, design and construction teams and occupiers to use natural resources more efficiently. It is an industry recognised standard against which people can feel confident in the sustainability of their asset as well as a tool against which buildings sustainability criteria can be compared.

BREEAM uses a series of assessments e.g. ecological, flood risk, travel plans and air testing, approved industry standards and proven theories and scientific research on human behaviour, building use and environmental impact to shape the assessment criteria included in its technical manuals.

Energy Assessments …by Celotex can support your project from concept to completion. We can support you with the following services amongst others:

  • SAP & SBEM Calculations
  • Thermal Modelling
  • LZC Feasibility Report
  • Life Cycle Cost Analysis
  • Daylight Calculations

Contact us today

What is BREEAM - Energy Assessments ...by Celotex

The BREEAM UK New Construction 2018 scheme was launched on 7th March 2018. The BRE will not be accepting BREEAM New Construction 2014 registrations from 23rd March 2018. Any scheme that is registered for BREEAM assessment post 23rd March 2018 will have to comply with the new 2018 technical requirements.

If you would like assistance in registering your project under the existing or the new technical standard, please let us know.

We can provide product information and support from concept design through to project completion for whichever BREEAM rating you need to build to.

If you have any questions on anything or there is anything that we can do to help you please contact us on info@celotexea.co.uk or call our helpful & friendly team on 0333 733 0850

Find out more about Energy Assessments …by Celotex


The term ‘London Plan‘ is popping up more and more in London construction but how well understood is it? In simple terms, the concept stems from the requirement and responsibility of three key stakeholders to the City of London; The Mayor of London, the 32 London Boroughs and The City of London Corporation. The London Plan itself looks at tackling economic, transport, social and environmental challenges such as climate change and its consequences. The aim is that a strong plan to overcome these challenges provides very real business benefits and opportunities as a result of becoming a world leader in these areas.

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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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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.

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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 »

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 »

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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