Natural Fibre Insulation
Specification Generator
The online tool provides a range of example building specifications utilising natural fibre insulation (NFI) for roof, wall and floor build-ups. For more detailed information and more accurate U-value calculations please take the specification to your chosen supplier.
![](https://spec.asbp.org.uk/wp-content/uploads/2022/07/natural-insulation-Thermafleece-3.png)