Glasswool - Earthwool glasswool insulation: Underfloor roll

Earthwool glasswool insulation: Underfloor roll


  • High thermal performance - year round comfort
  • DriTherm® technology - silicone treated glasswool for increased durability
  • Sound absorbing
  • Wind-wash barrier - protection from air movement
  • Saves energy - lower energy bills
  • No added formaldehyde
  • Soft to handle and install
  • Friction fit
  • Compression packed - more product per pack
  • Odourless.

Product Description

Earthwool® glasswool insulation: underfloor roll with a wind-wash barrier provides a high performing solution for improving the thermal performance of timber frame floors. The wind-wash barrier provides protection from air movement under the floor.

Adding to the already easy to handle and install qualities of Earthwool® glasswool, the insulation can be stapled in place.

Earthwool® glasswool insulation: underfloor roll will improve the thermal comfort and energy efficiency of the building in which it has been installed thus keeping it cool in summer and warm in winter. Super-soft to handle and install, Earthwool® glasswool is made using up to 80% recycled glass and with ECOSE® Technology, a sustainable, bio-based binder that contains no added formaldehyde.

Enhanced moisture resistance with DriTherm® technology. Earthwool® glasswool insulation is silicone treated, which provides moisture resistance for up to 50 years.

Product Range


Material Code R-Value (m²K/W) Thermal Conductivity (W/mK) Thickness (mm) Width (mm) Length (mm) Pieces per pack Area per pack (m²)
723803 1.8 0.042 75 600 10000 2 12
683671 1.8 0.042 75 500 10000 2 10

All dimensions are nominal.



Code Performance
Thermal AS/NZS 4859.1 (2018) -
Fire Hazard Properties AS/NZS 1530.3 Ignitability: 0, Spread of Flame: 0, Heat Evolved: 0, Smoke Developed: 0-1.
Water Vapour Absorption - Less than 5% by weight.
Microbial Growth - Does not support microbial growth.
Corrosion Resistance - No greater than sterile cotton.
Combustibility AS 1530.1 Non-combustible.

*The above data excludes the facing.


CodeMark - Earthwool glasswool CodeMark - Earthwool glasswool
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Knauf Insulation glasswool, Earthwool glasswool (BPIR) Knauf Insulation glasswool, Earthwool glasswool (BPIR)
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Building products that are covered by the CodeMark™ certification scheme are deemed to not be impacted by the regulation and do not require a separate BPIR document. The CodeMark™ certificate, along with associated reference documentation, provides all information outlined in the BPIR regulations, alternatively Knauf Insulation has a dedicated BPIR document for quick reference.

To find out more about our certifications visit:




File Size
MSDS - Earthwool glasswool
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Certificates, Datasheets

February 2017

0.2 MB

Faced underfloor roll installation instructions
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Installation Instructions

February 2020

0.06 MB

ECOSE Technology brochure
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November 2017

7.3 MB

Underfloor Roll Flyer
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December 2017

2 MB

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BIM Objects

February 2018

0.9 MB

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BIM Objects

February 2018

0.03 MB

Underfloor (faced) warranty
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November 2018

0.06 MB

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