External Walls Suck

External walls are responsible for sucking up to 35% of the heat loss from your house.  So insulating just the roof and underfloor and leaving the walls uninsulated is crazy.

CosyWall provides a simple cost effective solution, by installing external wall insulation without having to remove external cladding or internal linings. You’ll be cosy year round and you’ll save money too!

A great investment

External wall insulation is one of the best investments you can make. Not only will receive a great return on investment, you’ll also get immediate comfort and satisfaction. External wall insulation is installed once, costs nothing to run and lasts a lifetime.

Is Retrofit wall insulation right for my house?

CosyWall is designed to provide effective thermal external wall insulation for older homes constructed before 1990.


CosyWall insulation meets or exceeds NZ Building Code sections B2, E2, E3, F2, H1 requirements when used in buildings at any geographical location in accordance with the manufacturer’s instructions. Our installers can help with any paperwork that your local council may require and because CosyWall is CodeMark certified your building code compliance is guaranteed.

Installing external wall insulation will give you a warmer, drier, healthier home – and lower energy bills – so what are you waiting for? Contact the team at CosyWall insulation now!