How To Insulate A House!

How to Insulate a House

Choosing to insulate your home is a smart investment which can pay itself off in around 3-5 years. Home insulation can drastically reduce energy losses in both summer and winter and can cut your energy bills by up to half!

The best time to insulate your home is during the construction phase or during a major renovation project. Check out the information below for expert tips and ideas for how to insulate a house effectively. 

Need further reading material? We’ve also put together an ultimate insulation guide answering all your insulation questions.

What are the most important areas to insulate in a home?

To experience the many benefits of insulation, we recommend that you insulate all areas of your home. The most important areas to insulate are the areas which lose the most heat in winter and gain the most heat in summer.

The roof and ceiling space is the biggest culprit, responsible for as much as 30% of a home’s heat loss and gain. Next in line are the exterior walls which are responsible for up to 25% of the heat loss and gain followed by the floors at 10%.

You should also consider interior wall insulation and mid-floor insulation between floors of a multi-storey home. Insulation in these areas can help you heat and cool your home more effectively. By using specialised acoustic insulation, you can create a calm and welcoming indoor environment for the whole family.

Don’t forget to choose the right R-Value! R-value is a measure of the thermal resistance in an insulation batt, so the higher the R-value the greater the insulating capabilities.

Diagram showing winter heat losses in a home without insulation
Diagram showing summer heat gains in a home without insulation

How to insulate my home during construction?

Installing insulation in new builds is easy and convenient. Before the flooring is laid and the plaster is hung on the walls or ceilings, insulation batts can be fit between the timber joists and secured in place.

You may need to obtain a minimum energy rating for your new home as outlined in the Government’s Energy Report. This means you’ll need to choose a minimum insulation R-value for the various areas of your home, depending on where you live.

Buy Ceiling Insulation Online - R5.0 Insulation

How to insulate my house after it has been built?

If your home doesn’t have insulation or if it’s an older home, installing new insulation can help improve the energy efficiency and indoor comfort of your home.

Increasing the ceiling and underfloor insulation in your existing home can be done at any time when there is appropriate access to these areas. If you already have ceiling insulation it’s worth taking a look at its condition and deciding whether you should replace it or top it up for extra thermal resistance. Ensure that any existing home insulation is not wet, moist or mouldy as this will compromise its insulating performance.

The best time to retrofit wall insulation is during a major renovation. Insulation batts must be fitted while the wall cavity is exposed, before the plaster is hung.

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DIY – How to insulate a house yourself

Professional installers can install your insulation for a reliable, high quality finish. However, if you choose to install the insulation yourself, we recommend you visit our DIY insulation videos page on our website for more information and tips.

Install Attic or Loft insulation for greater thermal benefits

Bonus tips: Other ways to insulate your home

Whether you have a new home or an existing home there are other things you can do to improve the insulation in your home. Here are a few examples of how to reduce air draughts and energy loss through unexpected places in your home:

How to insulate your home without insulation

1. Make your home airtight

Ensure your home is draught-free and that you are not losing energy through cracks around doors, windows or through the floor. Sealant strips can be used around door frames. For gaps in windows and flooring, patch it up with putty or sealer.

Window frame keep your home air tight to save energy

2. Insulate around plumbing pipes

Insulating hot water pipes can save you money on energy costs by preventing heat loss to the surrounding air. The most common materials used are flexible foam, and foam-foil pipe insulation. Another benefit to insulating plumbing pipes is that it can dampen noises such as the sound of trickling and clunking in your pipes.

Install pipe insulation to save energy in your home

3. Consider double glazed windows

Installing double glazed windows is a great investment! It can save you energy and reduce noise transfer from outside to inside your home. The sealed air gap between the two glass panes acts as an extra layer of insulation and reduces heat loss in winter and heat gains in summer. 

Install double glazed windows to save energy

4. Use window coverings such as curtains

Keeping curtains or shutters closed in winter can prevent heat from escaping and prevent air draughts. Installing shutters can be beneficial to keep the warmth out during summer and the warmth in during winter.

Install window blinds to save energy

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2 thoughts on “How To Insulate A House!

  1. Toby Ryan says:

    I had no idea that you can significantly improve your home’s temperatures with insulation no matter what its R-value is. My wife and I have noticed that our fixer-upper home gets especially cold during the winter, and we’d like to find a way to make our living room warmer since we don’t have a furnace installed. We’ll rely on an insulation service to provide us with what we need.

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