CosyWall Insulation (CWI) is an external wall cavity insulation system (EWCIS) designed to insulate the walls of older homes. It provides thermal and acoustical insulation to existing wall cavities and is installed without the cost and hassle of removing the internal linings. Installation is done via small holes through the external cladding, or from inside via holes in the internal linings. The result is high installed R-values and a warm cosy home. CosyWall insulation has been successfully growing since 2002 based on three core principles;

- Using a Great Product.
- Developing Proven Methods.
- Ongoing Training and Auditing.

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why choose
existing wall insulation

  • Cavity wall insulation saves money and our nations limited energy resources.
  • CosyWall is non-combustible
  • External wall insulation can make your home warmer, drier, healthier
  • High installed R-values in comparison to other exterior wall insulation.
  • CosyWall is NZBC compliant and CodeMark certified
  • CosyWall is safe and has no added formaldehyde
  • CosyWall is a dry fibre existing wall insulation system that utilises water repellent glasswool insulation
  • CosyWall will not shrink or settle over time
  • Available nationwide through our specialist retrofit wall insulation resellers
  • Proven New Zealand history of use.
  • Fills up the gaps that are often left by a blanket or segments.

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wall insulation
news and blog

Wall Insulation is Life Changing

A cold and damp house is unhealthy – especially for kids and expensive to heat. Likewise a noisy house can also make our life miserable too. CosyWall Insulation has a simple IMMEDIATE solution to transform not only damp, cold houses but noisy ones too. CosyWall creates a warmer, quieter, healthier home, and CosyWall makes getting Wall […]

Wall Insulation Q&A

Kiwi homes are notoriously cold and damp – so investing in the correct insulation for your home can be one of the best investments you’ll make. Not only will insulation keep your home warm in the winter and cool in the summer, there are a number of other benefits – including a healthier home and […]