Earthwool® Glasswool

Modern glasswool insulation for New Zealand

Earthwool glasswool insulation segments and rolls are extremely versatile and can be used in applications from wall and ceiling insulation to HVAC and industrial applications. Earthwool glasswool is rot-proof, odourless, non-hygroscopic, does not sustain vermin and will not encourage the growth of fungi, mould or bacteria. This Knauf Insulation product is made using ECOSE® Technology. It is chemically neutral, does not contain impurities and comes with a 50 year warranty.


Earthwool Glasswool is designed for use:

  • Ceiling Insulation segments and blankets
  • External Wall Insulation segments for thermal and acoustic
  • Internal Wall Insulation for acoustic
  • Underfloor Insulation 'quilted' and 'faced' rolls
  • DriTherm Masonry slab
  • Heating, Ventilation and Air Conditioning
  • Sustainability

    Earthwool glasswool from Knauf Insulation uses a high proportion of post-consumer recycled glass bottles and is one of the most sustainable types of insulation available. Each pack of glasswool from Knauf Insulation uses up to 15 recycled glass bottles. Earthwool glasswool insulation is naturally brown - containing no added phenols, formaldehyde, acrylics or artificial colours. It is in full compliance with formaldehyde-free specifications.

    ECOSE® Technology

    The new generation of glasswool products made using ECOSE Technology benefit from a binder which has no added formaldehyde and is based on renewable bio-based materials instead of traditional petrol-based chemicals. The technology has been developed for Knauf Insulation's glasswool and rock mineral wool products, enhancing their environmental credentials whilst maintaining the thermal, acoustic and fire performance and mechanical properties.

    ECOSE Technology gives a distinctive new look to Knauf Insulation's Earthwool glasswool products - a natural shade of earthy brown, with no added dyes, bleaches or artificial colours. Earthwool glasswool is also less dusty and has a much softer and friendlier feel whilst retaining its rigidity and stiffness properties. The ECOSE Technology binder is less energy intensive than the formaldehyde binders used in traditional glasswool insulation. As there is no formaldehyde or phenols used in the manufacturing process for Earthwool glasswool, it also improves the indoor air quality of buildings where these products are installed (compared to conventional glasswool products).

    The new generation of glasswool made using ECOSE Technology is already used in buildings throughout the USA, UK, Europe and Australasia.