Draught proofing

9 out of 10 homes in Victoria have unwanted draughts!

Draught proofing video screenshot

Energy Efficiency at Home: Draught Proofing

Discover the best way to draught proof your home. Draughts can not only leave your home uncomfortable but can increase heating costs by around 20%.

What is draught proofing?

All houses have air leaks, or draughts. Draught proofing is finding and fixing those draughts to make your home more comfortable and energy efficient.

Draughts are like ventilation – both let fresh air into your home. Good ventilation helps reduce condensation and damp and can help cool down a hot house. But draughts are uncontrolled: they let too much cold air in and waste too much heat.

To draught proof your home, you should block up unwanted gaps that let cold air in and warm air out.

You can check for draughts by:

  • Looking for obvious gaps – visible light under and around doors and windows
  • Listening for rattles or whistling around doors and windows, especially during strong winds
  • Feeling for moving air around doors, windows, fireplaces, air outlets, vents, stairways, floorboards, exposed rafters and beams, built-in heaters and air conditioners, architraves, and skirting boards
  • Looking for movement in curtains

Note: If your home has gas appliances, please read our warning (below) before proceeding.

What are the benefits of draught proofing?

Draught proofing stops warm air from escaping your home in winter and hot air from entering in summer, thereby saving you money and making your home more comfortable.

Draughts and unwanted air leaks not only make your home uncomfortable, but they can also increase heating costs by around 20%, or up to $160 every year.

How to draught proof your home

Draught-proofing is one of the cheapest and most efficient ways to save energy – and money – in any type of house. Find out how to draught proof your house by following our simple how-to guides below.


Special care needs to be taken in houses which have internal gas appliances, especially houses which have flueless gas heaters, a gas heater installed in a chimney or an open flued gas heater.

All flueless gas appliances require a certain amount of fixed ventilation to expel the products of combustion from the home and operate safely. Open flued gas heaters – which draw combustion air from the room in which they are located – require a supply of fresh room air to operate safely.

Fixed ventilation openings required for flueless and open flued gas heaters must not be blocked.

If you undertake draught sealing in your home and you have these types of heating, or other indoor gas appliances (e.g. internal open flued gas water heaters or ducted heaters), you should get a licensed gas fitter to check the safe operation of the appliances before they are used.

It is recommended that you have your gas appliances serviced at least every 2 years. Energy Safe Victoria provides further information on the safe operation of gas appliances.

More information

Smarter Choice partners (see list or map) have retail sales staff that can advise you about draught proofing.

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Fact sheet: Insulation & draught proofing