Polyester Underfloor Insulation

ecotherm is our NZ made underfloor insulation - consisting of polyester fibres creating a soft, easy to handle, friendly product. ecotherm complies with the insulation standard AS/NZS 4859.1.

Product detail

Supplied as a blanket ready to roll out and fixed between floor joists. This product can be installed as a DIY project, but for best results ask us to install for you.

Identifying it

Recyled ecotherm insulation is white. ecotherm packs are labelled to identify the specific R-value, coverage per pack in square metres (m2), material width, unit number or length of material, nominal thickness, minimum weight and date of manufacture.

How much do I need?

Coverage per pack of ecotherm insulation depends on the product and its thickness. Typical roll lengths and coverage per pack are summarized in spec sheets

Where can it be used?

ecotherm can be installed in:

  • walls
  • ceilings
  • mid-floors
  • underfloors
  • internal partitions
  • Sustainability

    ecotherm and its packaging is recyclable. Recycled ecotherm reuses waste polyester fibres as an integral part of product manufacture.


    ecotherm is warranted to comply with the Building Code.

    ecotherm, with normal maintenance, will continue to satisfy Building Code performance requirements for the following applications, and for not less than 15 years;

  • for installation that are moderately difficult to access or replace (for example, the building envelope, exposed insulation in the sub-floor space)
  • and including for which failure to comply with the Building Code would go undetected during the building's normal use, but can be easily detected during maintenance such as open access ceiling insulation.