Blowing Wool - Supafil CarbonPlus


Masonry cavity walls


Blowing Wool


Supafil CarbonPlus is specifically designed for installation into existing masonry cavity walls with narrow cavities down to 40mm. Supafil CarbonPlus is a silicone treated high performance, non-combustible Glass Mineral Wool for injection into cavity walls only by approved Knauf Insulation contractors.


  • Suitable for 40mm cavities
  • Euroclass A1 non-combustible
  • British Board of Agrément approved
  • Suitable for new-build or retrofit
  • Installed by approved contractors - quick and clean to install
  • Injected after wall constructed, allowing empty cavity to be checked before installation



Thermal Conductivity (W/mK)Euroclass Reaction to Fire ClassificationPack DimensionsPack Weight (kg)Packs Per Pallet


Supafil Carbon Plus BBA logo - Certificate No: 13/4969
Eurofins Gold
A1 Euroclass Fire Rating
Green Guide Rating A+
CE Marking
Bureau Veritas

Declaration of Performance

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Additional Product Information


We care for the people who make our products, the people who use them and the world we all depend on.

 Whilst we are dedicated to supplying sustainable high performance insulation solutions for enhanced energy efficiency in buildings, we also continually strive for improvements in our manufacturing and supply chain operations so to improve quality and minimise our impact on the environment. All Knauf Insulation production locations have state-of-the-art manufacturing equipment and meet the highest quality standards as well as they are supported by an ongoing research and development program. All of our products including Supafil CarbonPlus are sustainably manufactured.

At Knauf Insulation, we have 7 key sustainability considerations:

  • to conserve natural resources
  • to reduce the evironmental effects of our own processes
  • Treating people fairly, along the supply chain
  • Delivering our products efficiently
  • Building a comfortable and healthy indoor environment
  • Performance reporting
  • Recognition