The Roof Insulation Company Perth Western Australia
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Roof Insulation Perth WA
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Insulation products come in two main categories – bulk and reflective. These are sometimes combined into a composite material. There are many different products available. See ‘Insulation types’ for further information.

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Insulation types

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To compare the insulating ability of the products available look at their R-value, which measures resistance to heat flow. The higher the R-value the higher the level of insulation. Products with the same R-value will provide the same insulating performance if installed as specified.

Insulation in Australian homes (2005)

Source: Australian Bureau of Statistics, 2005.

Check the information supplied on the product, including the R-value, the price per square metre and whether it must be installed professionally or can be DIY – some types of insulation require the use of masks and protective clothing. Ensure that it suits your particular application and will fit within the space available. Ask if performance guarantees or test certificates are available.

Compare the environmental benefits of different products. Ask about recycled content and how easily the product can be recycled after use. For example, some brands of glasswool, polyester and cellulose fibre insulation contain significant amounts of recycled context. Contact the manufacturer or industry association to find out more.

The appropriate degree of insulation will depend on climate, building construction type, and whether auxiliary heating and/or cooling is to be used. Refer to the section headed ‘Insulation levels for your climate’.

The Building Code of Australia sets out minimum requirements for materials. R-values used in construction of buildings. For reference, please refer to BCA Volume Two Part 3.12. It is generally advisable to exceed these for greater comfort and energy savings.

The higher the R-value the better the thermal performance.

Material R-values are supplied with bulk insulation and refer to the insulating value of the product alone. The higher the R-value the better the thermal performance.

Total R-values are supplied with reflective insulation and depend on the product being installed as specified.

R-values can differ depending on the direction of heat flow through the product. The difference is generally marginal for bulk insulation but can be pronounced for reflective insulation.

Up R-values describe resistance to heat flow upwards (sometimes known as ‘winter’ R-values).
Down R-values describe resistance to heat flow downwards (sometimes known as ‘summer’ R-values).

Up and down R-values should be quoted when installing reflective insulation in roofs, ceilings and floors.


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Unit 2 / 11 Egham Road
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Western Australia