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

Cavity Wall full-fill Product Innovation for Celotex is shortlisted for The Building Awards 2016

As a company that leads the way in technological innovations, Celotex filled a huge gap in the market with the introduction of Celotex CF5000. Developed with a clear focus on maximising thermal efficiency with thinner solutions, the new and innovative CF5000 system gives architects, designers and specifiers the whole picture for full fill cavity wall applications.

Instead of choosing commercial value or performance, housebuilders using CF5000 can have both.

The industry challengeCelotex full fill insulation onsite

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).

As a result of these requirements the fabric of the building needed to be more robust, with better insulation, reduced air leakage and improved thermal bridging.

The ultimate goal: the homeowner to switch the heating on less.

Read more »

20 years ago you could walk into your local newsagent and spend your hard earned pocket money on a chocolate bar. For How to insulate your loft? Things to consider.your shiny 20 pence piece you could buy a bar that would be more than big enough to spoil your dinner. However, when you walk into your newsagents today not only is the cost of the chocolate bar much higher but the bar itself is a lot smaller. Despite these obvious changes we still expect the same tasty experience.

This trend, to achieve the same with less space, is seen in other areas of modern life with a good example seen when we compare new housing developments with developments of 25 years ago. The need for plot optimisation sees today’s developments with 3 storey ‘room in roof’ houses, whereas developments of 25 years ago tended to have only 2 liveable storeys.

Similarly this general trend has transferred itself to the refurbishment and retrofit markets with homeowners choosing to extend their houses not only outwards but also upwards.

Celotex Insulation offers a range of solutions designed to achieve compliant U-values in the thinnest possible thickness.

Read more »

Tips on how to stop overheating in your home

Rob Warren features in his latest addition of The Bald Facts, this time with an overheating special. In ‘cool’ attire, Rob discusses some of the things you can do to prevent your home from getting too hot this summer. Check out the video and blog below to understand more.

Read more »

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 US4025.

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.  Read more »

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 »

It is this time of year again, where we have tired and swollen feet from 3 fantastic days at Ecobuild!

Celotex rocked up to the largest construction show this week with the ‘…by Celotex‘ ranges of new innovation and showcased a striking display of fun, practical and educational features through augmented reality, touchscreen games and virtual reality. Among the colourful highlights of the ‘Flat is Back’ campaign we displayed our latest launch of the flat roofing range which comprises three products: Celotex Crown-Bond, Crown-Up and Crown-Fix.

In keeping with the show’s renown for innovation and interaction, the Celotex stand (E4064) offered visitors the chance to ‘Shoot, Share, Win’ in a wonderful social media competition. There was also an opportunity to meet a friendly team of experts from the Celotex Energy Assessment Service who were on hand to discuss visitors’ specific project requirements including advice on how SAP, BREEAM and Thermal Modelling amongst technical and project teams.

Our winner of £200 for Shoot.Share. Win. will be drawn at random next week, but in the mean time take a look and the wacky and wonderful volunteers (including a few staff) and let us know your favourite!

  • #flatisback - Celotex flat roofing insulation
  • #flatisback - Celotex flat roofing insulation
  • #flatisback - Celotex flat roofing insulation
  • #flatisback - Celotex flat roofing insulation
  • #flatisback
  • Genea
  • @ZeroCarbonHub
  • @VDunkley
  • @sams_mission
  • @PygallLisa
  • @Ovenpad
  • @PaulinaMalinska
  • @Lizzie_Celotex
  • @ERSconsultants
  • @Ecobuild_now
  • @ERSconsultants
  • @CompetitiveA
  • @Bebesyy




In-built separating layer in Celotex FI5000

Celotex continues to innovate not only through improved website tools like the new and improved U-value Calculator but also through continuous development and improvement of the products we offer.

In the past 18 months Celotex has brought several innovative products to the market.  A perfect example of this is our full fill cavity wall board, Celotex CF5000, which allows designers to achieve the much desired 0.18 W/m2K in a 100mm cavity as standard

Within all Celotex product innovations the need to understand the motivations of the people installing the insulation is paramount. One often asked question from contractors and designers to the Celotex Technical Centre is why we need a separating layer on top of the insulation prior to laying screed. The need to protect the foil face of the insulation from the wet screed, stopping screed migration through the board joints and creating a vapour control layer is the answer. This practice is well established in the insulation industry and has its place when the motivation for a quick completion on site is not so great.

Floors…by Celotex has offered another approach.

Read more »

Celotex launch three new flat roofing insulation solutions

Introducing three advanced Flat Roofing solutions featuring cutting-edge thinness and thermal performance with solutions for mechanically fixed single ply and built-up applications as well as our new unique product, suitable for single ply bonded applications.

Celotex Flat Is Back - Flat Roofing Insulation

Our relationship with the UK’s installer and distribution communities has equipped us with unique insights, feedback and testing opportunities. Developed and rigorously tested over eighteen months, our new Flat Roofing products have had to meet demanding standards of integrity and performance. Read more »