Double Glazing Melbourne
Everything you need to know before replacing your windows. Answers to the most common questions Melbourne homeowners ask about double glazing, thermally broken aluminium, costs, performance, and what to expect from the process.
Trusted by Melbourne homeowners since 2006
Window Society supplies and installs thermally broken double and triple glazed aluminium windows and doors for Melbourne homes. We've put together this guide based on the questions we hear most often from homeowners considering window replacement or building new. If you have a question that isn't covered here, contact us directly and we'll give you a straight answer.
Are Your Windows Costing You More Than You Think?
If your home has single-glazed, timber, or older aluminium windows, you might be dealing with some of these issues.
Cold Drafts & Heat Loss
Old single-pane windows let the cold in and your heating bills up. Double glazing keeps your home at a comfortable temperature year-round.
Street Noise Keeping You Awake
Traffic, neighbours, barking dogs. Double glazed windows reduce outside noise by up to 70%, giving you the peace you deserve.
Rising Energy Bills
Poorly insulated windows are costing you hundreds each year. Our windows pay for themselves through lower heating and cooling costs.
Condensation & Mould
Moisture buildup damages frames and creates health issues. Double glazing eliminates condensation problems at the source.
Outdated Appearance
Old timber or aluminium frames date your home. Modern slim-profile windows add value and street appeal instantly.
Hard to Clean & Maintain
Painted timber needs constant upkeep. Our aluminium frames are virtually maintenance-free and look great for decades.
Double Glazing Melbourne: Common Questions Answered
UNDERSTANDING DOUBLE GLAZING
What is double glazing?
Double glazing refers to a window unit made up of two panes of glass separated by a sealed cavity, typically filled with argon gas. The cavity acts as an insulating barrier, significantly reducing the transfer of heat and cold through the window compared to a single pane of glass. In Melbourne's climate, double glazing keeps homes warmer in winter, cooler in summer, and substantially reduces outside noise entering the home.
What is thermally broken double glazing?
Thermally broken double glazing combines a double glazed glass unit with an aluminium frame that has a continuous polyamide barrier inside it. This barrier physically separates the exterior and interior sections of the frame, interrupting the path through which heat and cold transfer through the metal. Standard aluminium frames conduct heat and cold freely, which limits the thermal performance of the window regardless of how good the glass is. A thermally broken frame solves that problem at the source, making it the most effective window system for Melbourne's climate.
Is double glazing worth it in Melbourne?
For most Melbourne homes, yes. Melbourne's climate combines cold winters, hot summers, and rapid temperature swings that put consistent pressure on a home's building envelope. Single glazed windows, which still make up the majority of Melbourne's existing housing stock, transfer heat and cold almost freely. Upgrading to thermally broken double glazing typically reduces heating and cooling energy consumption by 30 to 50 percent, eliminates condensation on windows, and significantly reduces traffic and neighbourhood noise. For homeowners planning to stay in their home for five or more years, the performance improvement and comfort gain makes double glazing a straightforward decision.
What is a U-value and why does it matter for windows?
A U-value measures how quickly heat transfers through a window assembly, including both the glass and the frame. The lower the U-value, the better the window insulates. A standard single glazed aluminium window has a U-value of around 6.0 W/m²K. Thermally broken double glazed systems typically achieve U-values between 1.6 and 2.4 W/m²K depending on the glass specification. In practical terms, a lower U-value means less heat lost in winter and less heat gained in summer, resulting in lower energy bills and a more comfortable home year-round.
COSTS AND SPECIFICATIONS
How much does double glazing cost in Melbourne?
The cost of double glazing in Melbourne depends on the number of windows and doors, their size, the specification chosen, and whether the job is supply only or supply and install. For a typical Melbourne suburban home requiring 10 to 15 windows and doors replaced, supply and install costs generally range from $20,000 to $50,000. Larger homes, homes requiring higher-specification glazing for acoustic or thermal reasons, or homes with non-standard opening sizes will sit above that range. The most accurate way to understand the cost for your home is a free on-site assessment, which Window Society provides across metropolitan Melbourne. See our full Melbourne cost guide.
How much does window replacement cost in Melbourne?
Window replacement costs in Melbourne vary based on the same factors as double glazing generally: number of openings, size, specification, and whether installation is included. A whole-home window replacement for a typical 3 to 4 bedroom Melbourne home typically ranges from $20,000 to $80,000 for supply and install. The investment reflects the performance improvement, the longevity of the product (aluminium frames last 40 years or more with minimal maintenance), and the impact on the home's comfort, energy efficiency, and value.
What is the difference between double glazing and triple glazing?
Double glazing uses two panes of glass with one insulating cavity. Triple glazing uses three panes with two cavities, providing higher thermal insulation and better acoustic performance. For most Melbourne residential projects, thermally broken double glazing is the right specification. Triple glazing is better suited to homes in cooler parts of Victoria, rooms with significant noise exposure from traffic or industry, or projects targeting 7-star NatHERS energy ratings and above. The premium for triple glazing over double is typically 20 to 30 percent on the glazing component, which needs to be weighed against the additional performance for your specific situation.
What aluminium window systems are best for Melbourne homes?
For Melbourne's climate, thermally broken aluminium is the recommended frame material. It combines genuine thermal performance with slim profiles, design flexibility, and minimal maintenance requirements. Window Society's SoTherm range includes systems suited to window replacement, new builds, and architectural projects, with profiles ranging from ultra-slim residential systems to semi-commercial applications. All systems are available in standard colours including white, black, and grey, as well as custom powder coat finishes.
PERFORMANCE AND MATERIALS
How does double glazing reduce noise?
Double glazing reduces noise by creating an insulating barrier between the exterior and interior glass surfaces. The acoustic performance depends on the gap between panes, the thickness of the glass, and whether the glass is specified with acoustic interlayers. For homes near busy roads, tram lines, or flight paths, an asymmetric glass specification using two panes of different thickness performs better than equal-thickness panes because it disrupts sound waves across a wider frequency range. Window Society specifies glazing to match the noise profile of each home's location.
Is thermally broken aluminium better than uPVC?
Both thermally broken aluminium and uPVC perform well thermally and require minimal maintenance, making them both significantly better than untreated aluminium or timber for energy efficiency. The main differences are in frame profile, design flexibility, and longevity. uPVC frames are bulkier than thermally broken aluminium, limiting the glazed area and creating a different aesthetic that does not suit all architectural styles. Thermally broken aluminium offers slimmer sightlines, a wider colour range, greater design flexibility, and a lifespan of 40 years or more. For most contemporary Melbourne homes and renovations, thermally broken aluminium is the preferred specification.
What causes condensation on windows and does double glazing fix it?
Condensation forms on the inside surface of windows when warm, moist interior air contacts a cold surface. Single glazed glass in winter sits close to outdoor temperature, making it cold enough to pull moisture out of the air. Thermally broken double glazing keeps the interior glass surface significantly warmer by insulating against outside temperature, eliminating the temperature differential that causes condensation to form. For most Melbourne homes, switching to thermally broken double glazing eliminates interior condensation entirely.
Can double glazing be fitted to existing frames?
In most cases, no. Retrofitting double glazed units into existing single glazed frames is rarely practical because the frames are not designed to hold the additional weight and depth of a double glazed unit. The more effective approach is to replace the entire window assembly, frame and glass together, which ensures the thermal performance of the frame matches the glass. This is what Window Society does: full replacement of the window assembly with a thermally broken double glazed system custom-manufactured to fit the existing opening.
THE PROCESS
Who does window replacement in Melbourne?
Window Society is a Melbourne-based specialist in thermally broken double and triple glazed aluminium windows and doors. We supply and install custom window replacement packages for homeowners across metropolitan Melbourne and regional Victoria. Our showroom is located in Airport West and we offer free on-site assessments across Melbourne. Every system we supply is custom-manufactured to the exact dimensions of your home, with no standard sizes or off-the-shelf substitutions.
How long does window replacement take in Melbourne?
The full window replacement process from first contact to completed installation typically takes 12 to 16 weeks. This includes an initial consultation and measure, a quoting and approval period of 1 to 2 weeks, custom manufacturing of approximately 10 weeks, and installation of 2 to 3 days for a typical home. The manufacturing lead time reflects the fact that every window and door is custom-made to the exact dimensions of your home.
Do I need to replace all my windows at once?
No. It's possible to replace windows in stages, prioritising the rooms or openings that are causing the most discomfort or energy loss. Many homeowners start with the bedroom facing a noisy street, or the living areas that are hardest to heat in winter. A phased approach does mean two separate installation visits, but it allows the investment to be spread over time. Window Society can advise on which openings will deliver the greatest performance improvement for your home as a starting point.
What warranty do double glazed windows come with?
Window Society provides a 10-year warranty on aluminium profiles and glazing units. Aluminium frames, when properly maintained, have a lifespan of 40 years or more. The glazing units are sealed at manufacture and designed to maintain their insulating performance for the life of the window. In the event of seal failure or hardware issues within the warranty period, Window Society manages the rectification directly.
What areas does Window Society service for window replacement?
Window Society services all of metropolitan Melbourne and regional Victoria. We regularly work across the inner east including Toorak, Hawthorn, Kew, Malvern, Armadale, Camberwell, and Glen Iris, as well as bayside suburbs including Brighton, Sandringham, Elsternwick, and Bentleigh. We also service the outer suburbs and regional areas including Geelong, the Mornington Peninsula, the Yarra Valley, and Ballarat. Our showroom is in Airport West, and we offer free on-site assessments across our full service area.
How do I get a quote for double glazing in Melbourne?
The best starting point is a free on-site assessment. Window Society visits your home, reviews the existing windows, discusses what's driving your decision, and gives you an honest view of the right specification and what it's likely to cost before you commit to anything. You can request an assessment through the website or by calling 0422 922 688.
Real Results Across Melbourne
Balwyn North. Architectural extension with custom curved glazing and thermally broken aluminium throughout.
Elsternwick. Complete window wall transformation with thermally broken double glazing.
Hampton. Premium new build with thermally broken aluminium windows and doors throughout.
Richmond. Architectural sliding doors and full-height glazing delivering exceptional thermal performance.
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