Recommended R Value for Spray Foam Insulation
What is R value, and is it important?
The R-value is the measure of resistance to heat flow through material, dependent on the thickness of that material. The higher the R-value is, the greater the home insulation power. This doesn’t necessarily mean that the thicker the material, the better the insulation.
Recommended R-value for Spray Foam
In 2013, UK loft home insulation building regulations changed the minimum depth of insulation to 270mm. This is to ensure that properties are sufficiently insulated and to positively impact energy saving effects. For loft insulation, an R-value of 6.1 is advised, but it’s important to note that R-value does not measure heat movement carried in the air. Typical insulation materials such as mineral fibre may have a high R value but does not block air flow due to holes, cracks and gaps between it.
The R-value of Icynene® spray foam ranges from 3.7 to 6.75, depending on the type of Icynene® being used.
- Icynene® open-cell has an R-value of around 3.7
- Closed cell spray foam is 5.2 – 6.75
Icynene® home insulation is a two in one product, offering R-value insulation and an air barrier as it expands to 100 times its size and fills all gaps to prevent any air from passing through.
We recommend speaking with Icynene® contractors before making a purchase to find out exactly the amount of spray foam insulation that is required for your property.
Find out more about Icynene® spray foam insulation for residential properties from the UK’s leading accredited Icynene® home insulation contractors. Feel free to get in touch with our friendly team for a no obligation quote on 0800 246 5051 or us our instant quote form.Back to FAQs