My name is Rob Firman and I’m a new member of the Celotex Technical Centre team. I joined the company following technical roles at a roofing systems manufacturer and a storage tank manufacturer. I have had some experience of insulation in the past so realise insulation is much more than the ‘fluffy stuff’ that sits in your loft. However, in my initial weeks with the company I have undergone a thorough and intensive training programme to allow me to ‘know insulation inside and out’. Throughout this time I have learnt many things about Celotex Insulation and PIR insulation in general. With this in mind I have used my blogging debut to share my ‘top 5 things I didn’t know about insulation’.
Things I Didn’t Know About Insulation – Top 5
No 1: Walls are the biggest heat loss contributor
When looking at an average home in any street in any town in the country as a novice to the theory of heat loss I would make an educated guess that as hot air rises the roof would be the largest culprit for heat loss. I have since learnt that the biggest contributor to heat loss on our average home is the walls due largely to the ratio of wall compared to other elements. Walls also have the added thermal efficiency implications of openings like doors and windows.
No 2: The value of a foil facer
Before my inception into the Technical Department I understood that the foil facers found on the outside of PIR insulation boards served a purpose in as far as providing a covering for the rigid PIR foam. What I didn’t know was that the type and quality of the foil facer has an effect on the air that it comes into contact with. For instance, the super low emissivity facer found on Celotex FR5000 allows a sealed cavity to gain an improved value for that air space compared with standard PIR insulation facers.
No 3: Celotex is excellent for thermal performance
I didn’t realise quite how much of a difference Celotex makes to a building. With a range of products that have super low lambda achieving better u-values and thinner solutions, Celotex PIR boards are a very good choice for insulation. I had no particular awareness of the benefits of Celotex but having learnt about the company and what they provide, I have faith in the product and the benefits that run alongside them.
No 4: The exposed perimeter of a ground floor has an influence
When insulating a ground floor the amount of insulation required is affected not only by the required U value and the construction build-up but also by the amount of the floor perimeter exposed to unheated spaces. This exposed floor perimeter coupled with the overall area allows the perimeter and area (P/A) ratio to be calculated. The larger the area the lower the P/A ratio so thinner amounts of insulation would be required compared with a high perimeter and area.
No 5: The benefit of a continuous layer of insulation
With the amount of research and development that goes into manufacturing PIR insulation boards it may be obvious that the thermal performance is far superior to other construction materials. To achieve 0.30 W/m2K, a common U-value requirement for domestic conversions, in a 100mm timber frame construction with brick cladding 80mm of Celotex GA4000 would be required. When a continuous layer of insulation is used only 50mm of Celotex GA4000 would be required to meet or better 0.30 W/m2K. The depth of the construction is often the priority but this does demonstrate the difference that bridging the insulation layer makes.
Thanks for reading and I look forward to writing more blogs in the future.