Natural Fibre Insulation Group

What is natural fibre insulation?

Natural fibre insulation (NFI) products and systems are derived from natural materials such as wood fibre, hemp, straw, cellulose, wool, cotton and flax.

Bitesize videos

About this video
Find out more natural fibre insulation and the important role ‘breathability’ can play in protecting the fabric of our buildings.

A snippet video from the ASBP webinar – ‘Natural Fibre Insulation and the Retrofit Challenge’, which took place on Thursday 15th February 2024. See below for the full webinar recording.

Speaker – Mark Lynn, Managing Director, Eden Renewable Innovations (Thermafleece) / Chair, ASBP.

Upcoming event

Webinar recordings

Natural Fibre Insulation Summit 2023 - 12/10/2023

Airtightness, Breathability and Condensation Risk in Buildings - 26/04/2023

Rethinking IWI with Natural Fibre Insulation - 26/01/2023

Inaugural Natural Fibre Insulation Summit - 03/11/2022

About the Natural Fibre Insulation Group (NFIG)

Ultimate Insulation Supplies

The Natural Fibre Insulation Group (NFIG) is a collective of ASBP members who are the leading manufacturers and suppliers of natural fibre insulation in the UK.

The purpose of the group is to work collaboratively to better communicate the many benefits of natural insulation products and systems.

Group activities include exhibiting at popular tradeshows (Futurebuild, UK Construction Week, London Build), hosting CPDs/events, publishing peer-reviewed briefing papers, journal/magazine articles, and more.

The group is open to ASBP members who are involved in the production, marketing and/or sale of natural fibre insulation in the UK.

The number of members in the group is not limited but all members should be able to work in good faith with others in the sector.

Contact Richard Broad at to find out more.

Featured campaign - 'The multiple roles of insulation'

Insulation is more than just U-values. It profoundly influences the performance of our buildings and has multiple roles, including:



Fire protection






Balanced consideration of this multi-functionality often makes natural fibre insulation the superior choice.

Related resources

Briefing papers

Webinar recordings

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