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Before You Insulate

Installing roof insulation without thinking it through can lead to expensive disasters down the track. Here are a few things you should consider before forking out for new insulation.

Do you actually need insulation?

Make sure new insulation will actually help to cool your home. Shading windows, installing blinds or increasing ventilation can be just as important as insulation.

What type of insulation is right for you?

Decide on the best insulation option for your home. You can install some types of batt insulation yourself, but the loose fill variety will require a professional.


Where will you put it?

The ceiling is the most common place to put insulation, but under-floor insulation is sometimes recommended for suspended timber floors. Wall insulation is a definite plus, but is rarely put in existing walls due to the difficulty of installation.

Check the R-value

Every insulation product has an R-value - a value describing how well the material stops unwanted heat transfer. The higher the R-value, the better the insulation.

Ask your insulation supplier what R-value is recommended for your area's climate.

Is it accredited?

Make sure the insulation you buy complies with Australian/New Zealand Standard 4859.1. This specifies the testing and labelling requirements for building insulation.

Lose those leaks

Make sure your roof is properly sealed and your tiles or shingles are in good condition before installing insulation. A leaking roof can cause irreversible damage to your insulation very quickly.

Watch out for wires

Get your electrician to check the wires in your roof space and make sure it's safe to cover them with insulation.

Safety first

If you're installing insulation yourself, wear protective clothing to protect against itching and respiratory irritation. A long-sleeved shirt, sturdy shoes, gloves, goggles and a dust mask are recommended any time you crawl inside your roof space.

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