Warmer, dryer, healthier Waikato homes.
What we insulate
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Retrofit walls · Our flagshipCosyWall Thermal
Retrofit wall insulation for existing Waikato homes. We drill small holes, blow insulation into the empty wall cavity, then seal and repaint — no relining, done in a day for most homes.
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Ceilings & roofsLoft Insulation
Blown ceiling and roof insulation that fills every gap around trusses, wires and pipes — typical installs reach R6.0 for warmer winters and cooler summers.
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Underfloor & midfloorWarmafloor
Retrofit underfloor insulation blown between the joists with a wind-wash barrier — no more cold floors on frosty Waikato mornings.
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Quieter internal wallsCosyWall Acoustic
Acoustic insulation blown into internal walls to soak up voices, music and TV noise — better sleep, privacy and focus at home.
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New buildsTrufill
A complete blown insulation system for new builds — walls, roofs and floors. CodeMark certified and built to sail past the new H1 standards.
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Loft Insulation
Warmafloor
CosyWall Acoustic
CosyWall Thermal
Hear from our customers
“Prompt response from our initial contact right through to our wall insulation installation.”
“Thank you again for your brilliant service and the amazing difference it made!”
“Fast, responsive and knowledgeable! Insultech are the company you want to use for home insulation.”
A warm, dry home is a healthy home
Up to a third of your home’s heat escapes through an uninsulated roof, and up to a quarter through empty walls. That’s money out the window — and cold, damp rooms for your family.
Learn how a complete thermal barrier — ceiling, walls and floor — changes how your home feels to live in.
Is your Waikato villa losing a quarter of its heat through empty walls?
Most pre-1990s homes were built with nothing in the walls. Here’s how to tell — and what retrofitting actually involves.
Does Your Home Struggle with Dampness? How Insulation Can Help a Damp House
If you have noticed condensation on your windows, a persistent musty smell, or mould creeping along the corners of your ceilings, you are likely dealing with a damp house.
CosyWall Reviews and Why it is the Best Retrofit Insulation for your Existing Walls
Many older homes were built with little or no wall insulation. This can make them harder to heat in winter, hotter in summer, and less comfortable throughout the year.