Residential additions and alterations approvals in Australia amounted to $1.32 billion in June 2026, according to ABS seasonally adjusted building approvals data. This amount was 4.0 per cent lower compared to May approvals. Approvals do not equal expenses, but they demonstrate that homeowners still have plans for sizable renovations of existing homes. Rarely are windows high on the list of renovations, although they contribute to comfort in practically any room. Imagine the 1970s brick house in Sydney’s western suburb and its aluminium frames rattling when there is a south wind blowing in. What should be done to these windows, should they be repaired, reglazed or replaced, and what makes up the decision?
Repair, Reglaze or Replace?
Not all broken windows require replacement, and a reliable glazier will tell it straight. Windows that have sticky rollers, broken seals or one broken pane within an intact window frame will benefit from the repairs. In case of reglazing, the existing frame is kept, but new glass is installed, which may include laminated or low-emissivity glass. There are some frames that are able to accommodate double-glazed window panes. Window replacement in Sydney is recommended when the window frames become rotten, corroded, out of square or leak. Double-glazed windows that start fogging between the panes should also be replaced instead of being repaired. Coastal area houses are subject to ageing of frames and hardware faster.
The Influence of Windows on Comfort and Energy Bills
Windows are considered to be the major sources of heat exchange in and out of a building. According to Your Home by the Australian Government, up to 87 per cent of heat gain may go through windows. Your Home also suggests that up to 40 per cent of heating energy loss takes place through windows. This is the upper estimate and depends upon climate, orientation, building design and existing windows. There are two measures describing how a window performs: U-value stands for heat flow through windows and SHGC stands for solar heat gain coefficient. Low values of U-value preserve heat in winter, and proper values of SHGC protect a house from excess sunlight in summer. The Window Energy Rating Scheme uses both values and presents them in stars for heating and cooling ratings. Comparing stars in quotes helps to estimate which window is actually more expensive.
Finding the Right Glass for Sydney’s Real Issues
Western Sydney homes are no strangers to beating the heat on a long summer’s afternoon, thanks to west-facing glass. The good news is low-e or tinted glass can give you a bit of relief, but let’s be honest, nothing beats having some decent external shading from eaves or an awning. And if you live near major roads, rail lines or have a house under a flight path, you’ll probably want to upgrade to laminated acoustic glass in a decent frame to keep the noise down. If you live on the outskirts of the city and are worried about bushfires, there are even more rules to navigate; you’ll need to choose glazing that matches your property’s bushfire rating.
Indoors, don’t forget about safety. The Australian Standard AS 1288 sets the bar pretty low when it comes to where people might come into contact with glass. So, doors, low windows, bathrooms and glass near stairs all need safety glass, depending on how big they are and where they are in your house. And just to be safe, you’ll need to get the right type and thickness confirmed by a qualified glazier.
Licences, Contracts and Strata Approvals: The Fine Print
In NSW, if you’re doing any glazing work that costs over $5,000, including labour and materials, you’re going to need a contractor with a licence. Lucky for you, NSW Fair Trading makes it easy to check if your contractor is legit; just head to their website and check in a minute or so before you sign anything. And by the way, any work over $5,000 also needs to be done with a proper written contract, so both sides are clear on the details.
And then there’s Home Building Compensation cover, which kicks in once the contract price goes over $20,000. Apartment and townhouse owners need to consider one extra little detail, because external windows often belong to the whole building, not just your unit. So you’ll need to talk to the owners corporation to figure out who’s responsible, and check out the strata plan and by-laws to see what you’re on the hook for. And if you live in a heritage or conservation area, you’ll probably need to get the council on board before you make any changes to your frame styles.
Getting Quotes That Are Actually Comparable
Quotes for the same job can vary wildly, so it’s a good idea to ask for the same old identical details; make it way easier to compare. Ask for the type of glass, the frame material, WERS ratings, installation method and warranty terms in writing. Don’t forget to check whether removing old frames, fixing up around the openings and getting rid of the rubbish are all included in the price. And lead times are important too; custom double-glazed units take a while to manufacture.
It’s worth considering that a slightly dearer quote might actually end up cheaper in the long run if it has better ratings and a clearer warranty. Maybe that rattling frame we talked about earlier just needs new seals, or maybe it needs a full replacement, but a proper inspection, not just a sales pitch, is the only way to figure that out.
