Windows Republic specialises in high-performance uPVC double glazed windows in Melbourne, providing energy efficient, noise-reducing, and thermally insulated window solutions for modern Australian homes.
Our locally manufactured uPVC double glazing systems are designed to improve comfort, reduce energy bills, and enhance property value.
✔ Established in 2016 | ✔ UV Stabilised Profile | ✔ Ultimate Energy Efficiency | ✔ Master Builder | ✔ 10-year warranty and lifetime support
Windows Republic manufactures high-performance double glazed uPVC windows and doors locally in Melbourne. Our products are produced using advanced European hardware and strict fabrication standards to ensure durability, precision, and ongoing energy efficiency.
• Australian Standards compliant
• UV stabilised profiles
• Faster lead times across Melbourne
• Reduced risk of damage in transit
• Better supply chain quality control
• Local hardware suppliers
• No delays caused by overseas parties
• Faster response to unforeseen issues
• Lower carbon footprint
• Supporting local Australian jobs
Our streamlined 3-step process ensures your project is delivered quickly, efficiently, and without hassle. Sit back and let our team take care of everything.
1
Our Project Manager visits your property to take precise final measurements, ensuring a perfect fit before production. Final drawings are sent to you for approval.
2
FAST MANUFACTURING
Your order is produced at our Cheltenham facility using advanced European CNC machinery and strict quality control. Premium German hardware ensures durability, while our central Melbourne location allows faster turnaround and smooth coordination with installation.
3
PROFESSIONAL INSTALLATION
Our skilled and courteous in-house installers complete the installation with care and precision. We maintain clear communication throughout the project and clean thoroughly each day, leaving your home tidy and respected.
We can supply double glazed windows and doors for your new project. From small scale owner builders to large scale developers. Upload your plans to receive a comprehensive quote.
All our products are fully compliant with Australian Standards (AS2047).
Double glazing improves insulation and can reduce heating and cooling costs according to energy efficiency guidelines (Sustainability Victoria).
Everything you need to know about double glazed windows in Australia
Single glazed windows use one pane of glass and offer minimal insulation, allowing heat and cold to pass through easily. Double glazed windows use two panes separated by an insulating gap filled with air or argon gas, dramatically reducing heat transfer, noise, and condensation. In Melbourne's climate, upgrading can reduce heating and cooling costs by up to 30%.
Yes — particularly in Melbourne and Victoria where temperatures range from below 5°C in winter to above 40°C in summer. uPVC double glazed windows reduce heat loss, block heat gain, and cut energy bills year-round. They also reduce noise by up to 70% and add resale value.
Costs typically range from $1,500 to $4,000 per window depending on size, glass type, and frame colour. A whole-home replacement for an average Melbourne property generally costs between $15,000 and $40,000. Windows Republic offers a free measure and quote for accurate pricing specific to your project.
Yes. Double glazed windows significantly reduce outside noise by creating an insulating barrier between two panes of glass. For homes near busy roads, trams, or flight paths, Windows Republic also offers acoustic glass upgrades that can reduce noise by up to 70% compared to standard single glazed windows.
uPVC stands for unplasticised polyvinyl chloride — a rigid, durable form of PVC widely used in window and door frames. Unlike timber or aluminium, uPVC frames do not rot, corrode, or require painting. They are thermally broken by design, fully recyclable, and the preferred frame material for double glazed windows in Australia.
For energy efficiency, uPVC significantly outperforms aluminium. Aluminium is highly conductive and transfers heat and cold easily, whereas uPVC is naturally thermally broken. uPVC also does not corrode in coastal environments and requires virtually no maintenance. While aluminium is cheaper upfront, uPVC delivers better long-term value.
Yes. Condensation occurs when warm indoor air meets a cold glass surface. Because double glazed windows maintain a warmer inner glass surface, condensation is significantly reduced. This helps prevent mould growth on frames and surrounding walls — a common problem in Melbourne homes during winter.
Low-E (low emissivity) glass has a microscopic metallic coating that reflects heat while allowing natural light through. In summer it reflects heat away; in winter it reflects internal warmth back inside. Windows Republic recommends Low-E glass for all Melbourne installations as it can reduce heat gain and loss by up to 70–77% versus standard clear glass.
A U-value measures how quickly heat passes through a window — the lower the number, the better the insulation. Standard single glazed aluminium windows have a U-value of around 6.0 W/m²K. uPVC double glazed windows with Low-E glass can achieve 1.1–1.4 W/m²K, making them approximately five times more thermally efficient.
uPVC double glazed windows with Low-E glass can stop up to 70% of heat loss and 77% of heat gain compared to standard single glazed aluminium windows. Most homeowners report energy bill savings of around 30% after installation, depending on home size, orientation, and number of windows replaced.
Possibly, but it depends on your property and local council requirements. If your home is subject to a heritage overlay, you'll generally need council approval before replacing or altering windows.
Window glazing refers to the glass fitted within a window frame. Single glazing uses one pane of glass, while double glazing uses two panes separated by an insulating air or gas gap. Double glazed windows significantly improve thermal insulation, reduce noise, and minimise condensation compared to single glazed alternatives.
Tilt and turn windows offer two opening positions: tilting inward at the top for secure ventilation, or turning fully inward like a door for easy cleaning and maximum airflow. They are a popular European design particularly suited to apartments and multi-storey homes where external cleaning is difficult — unlike awning windows, which open outward and are better suited to ground-floor rooms and standard residential homes across Melbourne.
Most residential installations take one to three days. Smaller projects involving a few windows can often be completed in a single day, while whole-home replacements typically take three to five days. Your home will never be left unsecured — all openings are fitted before the end of each working day.
Windows Republic manufactures uPVC double glazed windows locally in Melbourne at our Cheltenham facility, and is proudly Australian Made accredited. Profiles are extruded in Europe and reinforced with A-grade galvanised steel, while hardware is sourced from leading German manufacturers SIEGENIA and ROTO. Local manufacturing means faster lead times, no overseas shipping delays, and the assurance of Australian quality standards.
Yes. All products are independently tested in NATA-accredited laboratories and comply with AS 2047-2014 (Windows and External Glazed Doors in Buildings). Insulated glass units comply with AS 1288-2006. Windows Republic holds a manufacturing membership with Master Builders Victoria and has manufactured locally in Melbourne since 2020.
Yes. All Windows Republic products are backed by a 10-year warranty covering manufacturing defects, hardware, and frame integrity. We also provide lifetime support for any issues that arise after installation.
In most cases it is possible, however the best thermal and acoustic results come from replacing the entire window unit — frame and glass together. Retrofitting is limited by the existing frame depth and condition. Windows Republic can assess your frames during a free measure and quote to advise the best approach.
Windows Republic can supply and install windows and doors across more than 95% of Australia, including all of Victoria, South Australia, New South Wales, and Tasmania, and most parts of Queensland and Western Australia, up to cyclonic region C2.
Our showroom is nice and central for you to view the product samples and check out our manufacturing facility.
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