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Mammoth Ceiling Insulation

Mammoth ceiling blanket insulation is made in New Zealand from lofted, thermally bonded polyester fibres. Ceiling blanket is designed to fit into a ceiling cavity and lay over the joists to provide thermal insulation. The air under the blanket, the air trapped in the fabric and the air inside the hollow fibres all contribute to the blanket insulation.

The product range includes R1.8, R2.9, R3.2, R3.3, R3.6 and 4.0. These can be double layered to meet the Building Code.

Mammoth skillion sections are designed to promote high thermal performance in modern skillion roof or flat roof designs. High density and moisture-resistant they are made from 100% polyester with a controlled loft to ensure the required 25mm air ventilation gap to the roof is always maintained.

The product range includes R2.9, R3.2 and R3.6.

Key Features
  • Mammoth insulation creates a healthier, more comfortable home or work environment, costing less to heat and cool
  • Blankets can be double layered for higher R-value
  • Mammoth Ceiling insulation is BRANZ appraised (durability 50 years) and performance is guaranteed for 50 years
  • Mammoth is safe and easy to work with. No precautions are required for handling the product. It will not cause irritation when torn to length or cut with shears
  • Mammoth products contain recycled polyester fibres. Mammoth ceiling blanket insulation uses up to 7,400 recycled plastic bottles per 100sqm*
  • Up to 7,400 recycled plastic bottles are used per 100sqm*
  • Mammoth will absorb noise to create a quieter environment
  • Mammoth products are chemical free, with no formaldehyde or insecticides
  • Mammoth is unaffected by moisture, and will continue to perform when dried out
  • Mammoth will not sag or shrink over time
  • Mammoth products are Red List Free — International Living Future Institute
  • Manufactured in New Zealand by InZone Industries Ltd — a carboNZero certified organisation
  • Recycling plastic protects the environment by keeping the carbon content locked up in the polyester fibre and reducing landfill waste
  • Mammoth products are made in a near zero waste production process and are fully recyclable.
  • Some Mammoth products are Environmental Choice certified

* estimate based on 500ml plastic bottles (16.2g each).

Eco Choice Aotearoa (ECNZ) Licensed
Eco Choice Aotearoa
Homestar / Green Star (Envirospec) Compliant
Homestar / Green Star
Recycled Content (Pre-Consumer)
Pre-Consumer Recycled Content
LBC Red List Free
LBC Red List Free
NZ Made
NZ Made
NZ-Owned Business
NZ-Owned Business
Scope of Use

Mammoth ceiling blanket insulation is designed to be used as thermal insulation in timber framed or part framed ceilings of domestic and commercial buildings.

Statement of Building Code Compliance

In the opinion of BRANZ, Mammoth 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(a) not less than 50 years and B2.3.1(b) 15 years. Mammoth Insulation will meet this requirement.
  • Clause E3 Internal Moisture: Performance E3.3.1. Mammoth Insulation will contribute to meeting this requirement. See Paragraphs 13.1 and 13.2.
  • Clause F2 Hazardous Materials: Performance F2.3.1. Mammoth 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. Mammoth Insulation will contribute to meeting these requirements. See Paragraphs 14.1 and 14.2.
Other Performance Attributes
  • Performance is guaranteed for 50 years
  • Non-Toxic and Non-irritant: OSH Health and Safety Guidelines for the Selection and Safe Handling of Synthetic Mineral fibres.  Department of Labour, 1994, p18
  • Fire Testing: 
    • AS1530 Part 3: Ignitability (0), Spread of Flame (0), Heat Evolved (0) & Smoke Developed (3)
    • AS/NZS60695.2.11 — Glow wire flammability test (passed)
    • AS/NZS60695.11.5 — Needle-flame test (passed)
  • VOC Emission Test: Total VOC< 0.005mg/m3 (level below detection) and Formaldehyde < 0.009mg/m3 (level below detection)
  • Non Corrosive: AS/NZS4859.1 (Alkalinity of pH7.8)
  • Vermin Resistant: not a food source for vermin and not treated 
B2 Durability compliant
E3 Internal Moisture compliant
Internal Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
H1 Energy Efficiency compliant
Energy Efficiency
BRANZ Appraised
BRANZ Appraised
Ceiling Blanket Data Sheet
BRANZ Appraisal 797

No 797 [2020]

carboNZero certification
Declare Mammoth
Environmental Choice License
NZ Green Building Council Membership
Ceiling Blanket Installation Guidelines
Mammoth Insulation Warranty
Existing Home (Retro) Brochure
New Build Brochure

Mammoth Modern Insulation is part of InZone Industries Ltd, a carboNZero certified organisation that manufactures polyester insulation products for the building, construction, and residential markets.

Product Enquiries

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