Low cost high performance

PolyKing polyester underfloor insulation is specifically designed for the underfloor insulation of new and existing suspended floors. For new buildings, the insulation is installed after the flooring has been laid.

PolyKing is a highly durable, economical and effective option, designed and manufactured in New Zealand.

Made from 100% pure polyester fibre, free of toxins or added chemicals, gently melted to bond the fibres together for a dense, thermal barrier that will not slump or lose its effectiveness over time.

PolyKing underfloor insulation has been carefully engineered to be the best performing, most cost-effective underfloor insulation choice, backed by a 50-year guarantee and BRANZ testing for your assurance of quality and performance.

Polyking is designed to be stapled between floor joists in old or new houses to meet the requirements of the New Zealand building code.

The Underfloor Insulation that comes out on top!


Polyester fibre is a stable and durable material that holds it’s shape over time, so importantly, your insulation will not slump and loose effectiveness. It’s also highly resistant to moisture damage. We back all that with a 50 year guarantee.



PolyKing® is easy to install, coming in small bales designed to fit through manholes and under floors with a range of widths to suit regular joist spacing’s.

It can be easily ripped to length or cut around irregularities.


We use mostly recycled polyester fibre made from recycled PET bottles to make our insulation, so you’re helping keep plastic out of the environment.

PolyKing® is also 100% recyclable and it’s made right here in New Zealand.


Because it is made from 100% pure polyester, gently melted to bond the fibres together, PolyKing® does not contain any toxic chemical binders such as phenolic resin (that contains formaldehyde) commonly used in other insulation products.Polyester, like your clothing, is nontoxic, nonirritating, non-allergenic and safe for anyone coming into contact with it.

PolyKing® has no nasty chemicals added to worry about and no microscopic fibres to irritate or be inhaled.


Our underfloor insulation has a high loft thermal barrier to ensure the best possible heat retention. Pure Polyester fibres are gently melted to form a dense, durable underfloor to prevent sagging, backed by a 50-year performance guarantee.

Our underfloor insulation is BRANZ tested for its quality and performance.

Save more under your floor

PolyKing® is your affordable, sensible solution for the underfloor performance you need.

It’s a small investment that pays big returns in savings and benefits all round.

Over 1 million homes in New Zealand have little or no underfloor insulation. Studies show this can have a marked effect on your health - not to mention your comfort and your budget!

Insulating under your home’s floor can make a big difference to retaining the heat in your home, saving on your energy bills. For surprisingly little, you can make your home warmer, drier and healthier by having effective under floor insulation installed.

The cost effective option underlying a warmer, healthier home

Convinced? Questions?
Call or contact us!

PolyKing® is manufactured by trusted parent company Terra Lana Products, as an economical alternative to the Terra Lana wool insulation range.