Glasswool - Earthwool glasswool FloorShield underfloor batt

Earthwool glasswool FloorShield underfloor batt


  • TwinTech® - smooth finish on both sides
  • High thermal performance - year round comfort
  • Wind-wash barrier - protection from air movement
  • Sound absorbing
  • 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 FloorShield underfloor batt is manufactured from durable silicone coated glasswool and is faced with an ECOSE® glass veil, providing a wind-wash barrier. The wind-wash barrier provides protection from air movement under the floor to ensure the insulation will perform as per the stated the R-value*. Earthwool® glasswool FloorShield underfloor batt 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.

The super-soft and easy to handle benefits of Earthwool® have been further enhanced with TwinTech®. TwinTech® heralds another advancement insulation manufacture - the dual forming technique ensures there is a smooth finish on both sides of the insulation, which improves product handling and appearance. 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® insulation is silicone treated, which provides moisture resistance for 50 years.

*BRANZ research has shown the impact of wind-wash on exposed sub-floor insulation can reduce the thermal performance by 25%. Source:

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)
764622 2.6 0.035 90 420 1160 11 5.4
824550 3.0 0.035 105 420 1160 11 5.4

All dimensions are nominal.



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

*The above data excludes the facing.


Eurofins - Indoor Air Comfort Gold (Unfaced GMW) Eurofins - Indoor Air Comfort Gold (Unfaced GMW)
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
Earthwool FloorShield underfloor installation instructions
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Installation Instructions

January 2020

0.06 MB

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