Better windows and glazing

Single glazed windows are where a lot of your heating goes. Retrofit the windows you already have, or replace them properly – and start with the rooms that feel the worst.

Find local installers See the 6 upgrades

A common sign

“The windows stream with water every winter morning.”

If that sounds familiar, cold glass is pulling heat out of the room and turning the moisture in the air into water. A second pane keeps the inside of the glass warmer.

About Better windows and glazing

Warmer glass, quieter rooms.

Glazing upgrades come in three kinds. Secondary glazing adds a second pane inside the window you already have. Retrofit double glazing swaps the single glass in your existing frames for a sealed unit of two panes. Double glazing replaces the whole window with one. Both cut heat loss and outside noise – they just cost very different amounts.

You don’t have to do every window at once. Start with the worst-facing rooms – usually the bedrooms and the living area you heat the most – and do the rest when the budget allows.

Helps with

Cold rooms beside big windows

Helps with

Condensation streaming down the glass

Helps with

Traffic and street noise

Do this first

Insulate the ceiling and seal the gaps before you glaze. It costs far less, and it shows you which rooms still need better windows.

Not sure what you need?

Retrofit the windows or replace them?

Look at the frames first. They decide most of the answer.

Help me compare the options

Frames in good shapeSecondary glazing Good frames, glass you want swappedRetrofit double glazing Rotten, warped or jammed framesWindow and door replacement Want the warmest, quietest frameuPVC double glazed windows Slim frames to suit the houseDouble glazed aluminium windows A bedroom on a busy roadTriple glazed windows Not sure which windows matter most?Get a home energy assessment

6 upgrades in this category

Choose the upgrade you need.

Large white framed double glazed windows set into the pale stone wall of a modern home, a sunlit living room and gum trees reflected in the glass.

uPVC double glazed windows

The warmest frame of the common options, and the quietest. A full replacement rather than a retrofit.

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Large black aluminium framed double glazed windows, one awning sash open, set into the pale stone wall of a modern home with a sunlit living room inside.

Double glazed aluminium windows

Slim frames with a thermal break. Common where the look of the original windows has to be kept.

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A dark-framed casement window open on the curved rendered wall of a modern home at golden hour, floor-to-ceiling glass and a living room behind it.

Triple glazed windows

Three panes for the coldest rooms and the noisiest roads. Rare in Australia and worth asking who has actually fitted it.

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Secondary glazing

A second pane fitted inside the window you already have. Far cheaper than replacement, and it works on heritage frames.

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The original white timber casement windows of a 1930s bungalow, now double glazed, one open onto a garden of gum trees in warm afternoon light.

Retrofit double glazing

Double glazed glass fitted into the frames you already have. The frames stay and only the glass changes.

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A tradesman in navy workwear fitting a new white front door with a frosted glass panel on the verandah of a weatherboard home.

Window and door replacement

Not every glazing job is double glazing. Rotten frames, jammed sashes and doors that never sealed properly.

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Not sure where to start?

Stop guessing, start saving: find your home’s energy score.

Don’t waste money on upgrades you don’t need. A professional home energy assessment shows where your house loses heat and power, so your budget goes where it makes the biggest difference.

Find an assessor near me

Double glazing and secondary glazing specialists