How do R-values compare with CosyWall Insulation
We often get asked about R-values in CosyWall Insulation. An R-value is simply a measure of the thermal resistance of an insulation product. The higher the R-value, the better the insulation will hold heat inside during winter and keep heat out during summer.
CosyWall Insulation has one of the highest R-values achievable for this type of product. It performs at the same level as the top batts and blown insulation products available in New Zealand. This means you can expect excellent year-round comfort and energy efficiency when CosyWall is installed in your home.
How R-values work
Every building material resists heat to some degree. The R-value is a number given to that resistance. Higher numbers mean greater thermal resistance and better performance. For example, a wall with an R-value of 2.8 will resist heat flow more than a wall with an R-value of 1.9.
The total R-value of a wall is not just the insulation. It includes the combined resistance of all the materials in the wall, such as plasterboard, timber framing, and cladding. Adding high-performing insulation like CosyWall increases the total R-value and makes the wall more effective at maintaining a stable indoor temperature.
Why CosyWall achieves high R-values
CosyWall Insulation is a dry, high-density glasswool product that is blown into your wall cavities. The process fills almost every part of the cavity, leaving no joins, gaps, or crushed sections that can reduce performance. This is different to batt-style insulation, which can leave gaps around wiring, corners, or irregular framing.
Because CosyWall is installed under controlled density, it will not settle or shrink over time. This ensures it keeps its R-value for the life of your home. This complete coverage, combined with the material’s natural insulating properties, delivers consistently higher thermal performance compared to many other products.
Real benefits of a higher R-value
A higher R-value means your home will lose less heat in winter and gain less heat in summer. This makes it easier to keep a comfortable indoor temperature without relying as much on heating or cooling systems. It also helps reduce condensation and dampness, creating a healthier living environment.
With better insulation, your heating and cooling systems run less often, which can lower your energy bills. Over time, the savings can make a significant difference to household costs.
Why choose CosyWall Insulation
CosyWall specifically insulates the walls of New Zealand homes using high-quality, sustainable, and eco-friendly materials. The CodeMark certification confirms it has been tested and approved for performance and safety, giving you peace of mind. Installation is quick and tidy, with minimal disruption to your home. In most cases, we can complete the job in a single day.
Book your free home assessment
Don’t let a poorly insulated home cost you money on energy bills. Try our wall insulation cost calculator or contact us today to book your free home assessment and see how CosyWall Insulation can help improve your home’s thermal performance.