11 September 2025

Guide for natural fibre insulation

UK Alliance for Sustainable Building Products (ASBP) issues guidance to support the 'retrofit challenge'.

Hand of a worker holding hemp wool insulation material
Hemp wool insulation material © lavizzara/shutterstock

The ASBP Natural Fibre Insulation Group notes, 'As the construction industry moves toward lower-carbon, healthier and more resilient buildings, natural fibre insulation is playing a growing role as a high-performance, sustainable alternative to conventional insulation materials in both new-build and retrofit projects.'

The publication explores:

  • The many roles of insulation - thermal performance, fire safety, occupant wellbeing, acoustic performance, product sustainability, structural integrity and ease/safety of installation.
  • Taking into account environmental impacts and biogenic carbon benefits
  • Understanding the importance of ‘vapour open’ and ‘moisture buffering’ characteristics and why moisture control is especially important for historic buildings.
  • Different types/forms of natural fibre insulation, what they are derived from and how they are made. 

For more like this