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Frequently Asked Questions

What is R-Value?

An R-value is the measure used by the Australian insulation market to test an insulation product's level of thermal resistance. The higher the value, the more effective an insulation material is at keeping heat out of a building in the summer and trapping it during the winter.

It is very important to note that, while the R-value does measure heat transfer from one material to another, it's not a guaranteed measure of an insulation material's performance.

How to Measure Your Insulation

There are 3 factors to consider when measuring the effectiveness of your insulation.

  1. R-Value: Contrary to popular belief, not all materials with the same R-value will perform equally. Some materials will give off gas over time or lose their thickness and durability. Gaps in the materials when installed can also reduce its R-value by as much as 50 percent. Fortunately, Icynene® spray polyurethane foam (SPF) won't diminish over time.
  2. Vapour Permeance: Vapour permeance measures the rate at which insulation materials diffuse moisture. Unlike R-values, a lower perm rating means better performance. Ideally, insulation—like Icynene®—should allow for a strong flow of moisture through the building while reducing any heat flow that comes with it. This is important for fighting off condensation and the growth of mold in walls and ceilings.
  3. Air Permeance: If not properly installed or durable enough, any insulation material will lead to air pockets, allowing air to permeate through the area and allow for condensation. This can lead to future issues like the growth of mold and mildew. Fortunately, Icynene® provides advanced moisture and air management, allowing air only through mechanical ventilation and making your home heathier, quieter and more energy efficient.


If you'd like a more in-depth explanation of how R-Values work, please view this explanation video:


To speak with one of our representatives about our products, please or CALL US AT 1300 1SPRAY (77729).

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