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ecoinsulation Faced Thermal Underfloor Insulation

ecoinsulation Faced Thermal Underfloor insulation is made using recycled glass and a sustainable binder that contains no added formaldehyde and provides a thermal solution to floors to help create a home that is a comfortable temperature all year round. The insulation comes faced with a wind-wash barrier, which provides protection to air movement under the floor for enhanced thermal performance.

Key Features
  • High thermal performance for year round comfort
  • Sound absorbing
  • Wind-wash barrier
  • No added formaldehyde
  • 15 year warranty
  • Made using recycled glass
  • No dyes or artificial colours (natural blown colour)
  • Easy to install — staples into place
Recycled Content (Pre-Consumer)
Pre-Consumer Recycled Content
Scope of Use
  • ecoinsulation Faced Thermal Underfloor Insulation is faced with a wind-wash barrier, which provides protection to air movement under the floor
  • ecoinsulation glasswool has been appraised by BRANZ as a thermal insulating material for suspended timber framed floors in new or existing domestic and commercial buildings
  • ecoinsulation Underfloor Insulation are suitable for use under floors which have an enclosed perimeter foundation as defined in NZS 4246. It is also suitable for use where the subfloor area is not enclosed and is subject to wind, such as in open raised floors and pole houses
  • Easy to install as it can be stapled in place
  • Comes in a range of R-Values — see Product Schedule
Limitations on Use
  • ecoinsulation glasswool must be stored under cover and in dry conditions
  • Heavy objects must not be stacked on the packs. The packs must be stored in an orientation that avoids excessive compression of the product.

See BRANZ Appraisal 1050 for full information.

Statement of Building Code Compliance
  • AS/NZS 4859.1 Materials used in the Thermal Insulation of Buildings

In the opinion of BRANZ, ecoinsulation Underfloor Insulation if designed, used, installed and maintained in accordance with the statements and conditions of this Appraisal, will meet or
contribute to meeting the following provisions of the NZBC:

  • Clause B2 DURABILITY: Performance B2.3.1(b) 15 years and B2.3.1(c) 5 years. ecoinsulation Underfloor Insulation meets this requirement
  • Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. ecoinsulation Underfloor Insulation meets this requirement and will not present a health hazard to people
  • Clause H1 ENERGY EFFICIENCY: Performance H1.3.1 (a) and H1.3.2 E. ecoinsulation Underfloor Insulation will contribute to meeting these requirements

See BRANZ Appraisal 1050 for full information.

In-Service History

ecoinsulation glasswool insulation has been designed utilising world-class, proven technology from Knauf Insulation.

Other Performance Attributes
  • Water Vapour Absorption: Less than 5% by weight
  • Corrosion Resistance: No greater than sterile cotton
  • Microbial Growth: Does not support microbial growth
  • Fire Hazard Properties (AS/NZS 1530.3):
    • Ignitability: 0
    • Spread of flame: 0
    • Heat Evolved: 0
    • Smoke Developed: 0-1
  • Combustibility (AS 1530.1): Non-combustible*
  • Thermal Conductivity: AS/NZS 4859.1
  • Eurofins: Indoor Air Comfort Gold Standard
    *glasswool only

The formulation used for ecoinsulation glasswool insulation has been independently assessed to meet the requirements of the stringent Note Q standard (and is therefore consistent with the highest Australian and New Zealand industry standards), and also assessed by Knauf Insulation against the criteria of the Australian Safety and Compensation Council ASCC Approved Criteria for Classifying Hazardous Substances [NOHSC: 1008 3rd Edition]. As a result of this assessment, ecoinsulation glasswool insulation is not classified as hazardous according to the NOHSC criteria.


  • ecoinsulation glasswool offer a 15 year warranty on underfloor products
B2 Durability compliant
F2 Hazardous Building Materials compliant
Hazardous Building Materials
H1 Energy Efficiency compliant
Energy Efficiency
BRANZ Appraised
BRANZ Appraised
Data Sheet: Faced Thermal Underfloor
Product Schedule & R Values
CodeMark Certificate
Independent Appraisal (BRANZ)
Installation Instructions: Faced Thermal Underfloor

ecoinsulation glasswool is a range of thermal and acoustic products for residential and commercial applications giving tradies a choice of glasswool which is easy to handle, and easy on the planet.

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