Insulation acts as a barrier to heat flow and is essential for keeping your home warm in winter and cool in summer. A well-insulated and well-designed home provides year-round comfort and can cut cooling and heating bills by up to half. This, in turn, also can also reduce greenhouse gas emissions by around 850kg every year!

Insulation acts as a barrier to heat loss and heat gain particularly in roofs and ceilings, walls and floors. In many homes, insulation is the most practical and cost-effective way to make a house more energy efficient, keeping it cooler in summer and warmer in winter and saving up to 80% in heating and cooling losses.

An insulating material’s resistance to conductive heat flow is measured or rated in terms of its thermal resistance or R-value -- the higher the R-value, the greater the insulating effectiveness. The R-value depends on the type of insulation, its thickness, and its density. The R-value of some insulations also depends on temperature, aging, and moisture accumulation. When calculating the R-value of a multilayered installation, add the R-values of the individual layers.

Generally a insulation batt with a rating of R.4.0 is what most houses in perth require.

There are a few exceptions when you might need a higher rating. For example, the colour of your roof could determine if you need a higher density batt as darker colours tend to absorb more heat than lighter coloured roofs.

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