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Underfloor Foil Insulation

Draped foil insulation was a common form of underfloor insulation used in homes from 1978. It provided a radiant barrier between the warm room above and the cold sub-floor.
The effectiveness of foil insulation relies on it being shiny, untarnished and free of rips and tears.

Adding or repairing foil Insulation is banned.

Retrofitting or repairing existing foil insulation in the underfloors of New Zealand homes has been banned since 2016 under Section 26 of the NZ Building Act 2004. Use of foil for this purpose is now been banned due to its risks of electrocution and more effective thermal insulation products being needed.

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DIYers - be careful around foil insulation

Always be careful working near installed foil insulation especially underfloor. There is a risk of electric shock if staples holding the insulation have touched a live wire and there have been fatalities in New Zealand from foil insulation.

  • Turn the power off if you must work around foil floor insulation.
  • It is not permitted to repair foil insulation.
  • Repaired foil insulation will not meet the rental Healthy Homes Standards.
  • Consider using professionals to remove the foil and upgrade to bulk underfloor insulation.

Need home insulation installed?

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