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GreenStuf Underfloor

GreenStuf Underfloor are 100% polyester thermal insulation rolls, pre-cut to fit standard exposed timber joist floors.

Key Features
  • Reduces heat loss through floors and assists in reducing drafts caused through joins in the floorboards
  • Range of thermal performance options and as rolls pre-cut to fit standard exposed timber joist floors
  • Local and proud - proudly made in New Zealand
  • Durable — will not settle or reduce its performance over time and is backed by a 50 Year Product Durability Warranty
  • Fire Safe — polyester insulation is non-flammable and meets all the relevant fire standards for NZBC compliance including downlights
  • High Performance — not affected by moisture, mould or mildew, and is naturally resistant to insect and vermin attack
  • Safe to touch — 100% polyester, completely safe and does not require protective clothing for handling or install
  • Recycled content — manufactured using a minimum of 45% recycled PET Plastics, and also recyclable at the end of its life
Green Tag Certified
Green Tag Certified
Recyclable Content (Post-Consumer)
Post-Consumer Recyclable Content
Recycled Content (Pre-Consumer)
Pre-Consumer Recycled Content
NZ Made
NZ Made
NZ-Owned Business
NZ-Owned Business
Red List Material Free
Red List Material Free
Scope of Use

Autex Greenstuf Underfloor Insulation has been appraised as an underfloor insulation system designed to meet the NZBC Acceptable Solution H1/AS1 requirement for the insulation of underfloors within the following scope:

  • Timber framed floors in new and existing domestic and commercial buildings with a closed perimeter; and,
  • installed in buildings where the insulation remains dry during its serviceable life.

GreenStuf Underfloor must be installed in accordance with the Technical Literature to meet the building code requirement for the insulation of underfloors.

Limitations on Use



Statement of Building Code Compliance

In the opinion of BRANZ, GreenStuf Underfloor if designed, used, installed and maintained in accordance with the statements and conditions of Appraisal No. 734 (2016), will meet or contribute to meeting the following provisions of the New Zealand Building Code:

Clause B2 DURABILITY: Performance B2.3.1(a) not less than 50 years and B2.3.1(b) 15 years. GreenStuf Underfloor meets these requirements.

Clause F2 HAZARDOUS BUILDING MATERIALS: Performance F2.3.1. GreenStuf Underfloor 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. GreenStuf Underfloor will contribute to meeting these requirements.

GreenStuf Underfloor has been appraised as an Acceptable Solution in terms of New Zealand Building Code compliance. GreenStuf Underfloor material thermal resistance (R-value) has been determined by testing to AS/NZS 4859.1 which is an acceptable method.

Other Performance Attributes
  • 50 Year Product Durability Warranty
B2 Durability compliant
C Protection from Fire compliant
Protection from Fire
E3 Internal Moisture compliant
Internal Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
H1 Energy Efficiency compliant
Energy Efficiency
BRANZ Appraised
BRANZ Appraised
Interior Fire Rating 1S
All Technical Documents
Product Page

Autex is an innovative manufacturer of polyester products and has developed a diverse range of insulation and acoustic products.

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