What is Low-E Glass and Why It Matters
How the metallic coating on Low-E glass reflects heat, the difference between hard-coat and soft-coat, and why we use it on every double glazed unit we make.
Read articleBrowse the complete Windows Republic uPVC windows Melbourne range. Manufactured in Cheltenham with Deceuninck Legend Art profiles, site glazed, and certified to AS2047. Pick the style that suits your home, and we build, deliver, and install Melbourne-wide.
Windows Republic manufactures uPVC windows in Cheltenham, Melbourne, for homes across Victoria. Our entire range uses Deceuninck's new-generation Legend Art profile system, a Belgian-engineered frame paired with double or triple glazed argon-filled units. Built to order, certified to Australian standards, backed by a 10-year frame warranty, and unlikely to start a heated argument with your aircon.
Lower heating & cooling bills versus single glazing in a typical Melbourne home.
Acoustic-grade laminated glass with asymmetric panes, Rw 43–46 for traffic, trains, and aircraft.
Won't warp, rot, swell, or corrode in salt air. UV-stable for Australian conditions.
Wipe clean with a damp cloth. The most demanding maintenance schedule a uPVC window will ever ask of you.
Our uPVC windows Melbourne range covers eight styles, each engineered for a specific role: energy efficiency, ventilation, acoustic performance, or heritage character. Click any style for full specs, configurations, and project photos.
Two panes of glass with an argon-filled cavity. U-value from 1.1 W/m²K, SHGC 0.30–0.50, the standard performer for Melbourne homes.
Explore double glazingThree panes, two cavities. U-value from 0.8 W/m²K. Designed for passive house projects, alpine zones, and high-noise locations.
Explore triple glazingEuropean dual-action design. Tilt inwards for trickle ventilation, swing fully open for cleaning. Our most popular uPVC style.
Explore tilt & turnHorizontal sliding sashes on dual rollers. STC 35–40 standard, STC 40+ with acoustic laminated glass for traffic noise.
Explore sliding windowsAcoustic-grade laminated glass, asymmetric pane thickness, and high-spec seals. Tested up to 45 dB Rw rating for traffic and aircraft noise.
Explore acoustic windowsGeorgian-bar styling with modern uPVC performance. Designed for Victorian, Edwardian, and Federation homes under heritage overlays.
Explore colonial styleTop-hinged sash that opens outwards. Ideal for bathrooms, kitchens, and high-set windows where rain protection matters.
Read about awning windowsSide-hinged sash, opens fully outward for maximum airflow. A clean, vertical-emphasis style suited to contemporary homes.
Read about casement windowsMelbourne is one of Australia's most demanding climates for windows: freezing inland mornings, 40°C summer afternoons, salt-laden bay air, and bushfire zones across the eastern fringe. Every uPVC windows Melbourne installation we deliver is engineered specifically for these realities.
Low-E coatings reflect solar heat gain; argon-filled cavities resist conductive transfer. Inside stays cool without overworked aircon.
uPVC frames are immune to salt corrosion, essential for Mornington Peninsula, bayside, and coastal Melbourne suburbs.
Our uPVC windows are tested and certified to BAL-40, suitable for the Dandenongs, Yarra Valley, and the eastern bushfire fringe.
Colonial-bar styling and traditional sash configurations help homes under heritage overlays meet many council requirements. Final approval always rests with your local heritage authority.
Standard double glazed builds satisfy the NCC 2022 7-star residential thermal code that came into effect in October 2023.
Manufactured 18 km south-east of the Melbourne CBD, with short lead times, on-site quality control, and Melbourne crews installing.
Every uPVC windows Melbourne unit we manufacture meets or exceeds the NCC 2022 7-star NatHERS requirement. Performance figures below are WERS-rated for our Deceuninck Legend Art uPVC range with argon-filled glazing units.
| Metric | Double Glazed | Triple Glazed |
|---|---|---|
| U-value (whole window) | From 1.1 W/m²K (range 1.1–1.4) | From 0.8 W/m²K |
| SHGC | 0.30–0.50 | 0.25–0.40 |
| Standard glass build | 4 – 16 – 4 mm | 4 – 12 – 4 – 12 – 4 mm |
| Cavity width | 12–16 mm | 12 mm typical |
| Cavity gas fill | Argon (standard) | Argon (standard) |
| Acoustic rating (STC / Rw) | STC 35–40 | STC 38–42 |
| With acoustic laminated upgrade | STC 40+ (40–45 dB) | STC 42+ |
| Noise reduction vs single glazing | Up to 40 dB | Up to 45 dB |
| Bushfire rating | Up to BAL-40 | Up to BAL-40 |
| NCC 7-star compliant | Yes | Yes |
Our uPVC frames are extruded by Deceuninck, a Belgian profile manufacturer with over 80 years of window engineering. The new-generation Legend Art system is multi-chambered for thermal break, internally reinforced with galvanised steel, and rated for a 30+ year service life. Frames will not warp, rot, swell, or require painting. Deceuninck uPVC contains approximately 9% titanium dioxide by mass: the white pigment that prevents UV-induced yellowing and keeps the profiles dimensionally stable across decades of Australian sun.
Legend Art frames are available in solid colours and woodgrain foils. Single-sided and dual-colour options are both available; you can have white internally and a darker external finish.
Dual-colour orders use one colour internally and another externally. Cream-on-white is our latest dual-colour combination: clean white inside, soft cream facade outside.
Glass is the single biggest performance lever in any uPVC window. We supply six glass specifications across the range, and most Melbourne projects use a combination depending on orientation.
4 mm clear float glass, used in the inner pane of standard double glazed units. The cost-effective baseline.
Microscopic metallic coating that reflects radiant heat. Improves U-value by ~25% and reduces summer heat gain. Included on all our DGUs.
Two glass layers bonded with a PVB interlayer. Specified for acoustic performance and added security.
Heat-treated to 4× the strength of standard glass. Required by code for low sills, in all doors, and wet areas; included where the build code requires it.
Patterned or frosted finishes for bathrooms, ensuites, and street-facing rooms. Available in:
Inert gas in the cavity reduces convection and improves U-value compared to a plain air fill. Standard on every Windows Republic DGU.
uPVC is the dominant residential window frame material in Europe (over 60% market share). It outperforms aluminium thermally and matches timber's thermal numbers without the maintenance burden. Here's how the three compare for Melbourne conditions.
| Metric | uPVC | Aluminium (TB) | Timber |
|---|---|---|---|
| Frame U-value (double glazed) | 1.1–1.4 | 2.5–4.0 | 1.5–2.0 |
| Thermal conductivity (W/m·K) *raw material | 0.17 | ~200 | 0.13 |
| Maintenance | None, wipe clean | Low | Repaint every 5–7 yrs |
| Lifespan | 30+ years | 20–30 years | 15–30 years |
| Salt corrosion | Immune | Vulnerable | N/A |
| Moisture / rot resistance | Immune | N/A | Vulnerable |
| Acoustic damping | High | Low | Moderate |
*Aluminium's raw thermal conductivity is high, but thermally broken (TB) profiles use a polyamide bridge between the inner and outer extrusions to disrupt the conduction path; that is why the whole-frame U-value (top row) is far lower than the raw material number suggests. Non-thermally-broken aluminium frames have whole-frame U-values of 5.0–6.0 W/m²K. Sources: WERS frame ratings, ASTM thermal conductivity tables, AAMA durability data.
We are a uPVC windows Melbourne manufacturer, not a reseller. Every window passes through our Cheltenham workshop, is checked twice before dispatch, and is fitted by our own crews.
| Manufacturing location | Cheltenham, Melbourne |
| Lead time | 4–6 weeks from final measure |
| Frame warranty | 10 years on all Deceuninck Legend Art profiles |
| Hardware warranty | 10 years on Siegenia / Roto mechanisms |
| Workmanship warranty | 10 years |
| Trading since | 2016, with over 1,000 Melbourne windows installed |
| Memberships | MBAV (Master Builders Association Victoria), Australian Made |
| Certifications | AS2047, BAL-40 fire-tested, WERS-rated, 100% GreenPower |
A snapshot of recent uPVC windows Melbourne installations across the suburbs. Browse the full project gallery for floorplans, before/after photos, and acoustic results.
Independent reviews from recent uPVC windows Melbourne projects. For the full set, see our reviews page.
Vladimir and the team did a fantastic job at our Edwardian house in St Kilda. They were organised, punctual and tidy! The double-glazed windows, a mix of tilt-and-turn and sliding, have made a huge difference to our house.
The services provided by Vladimir of Windows Republic were professional, knowledgeable, friendly and efficient. He supplied and installed double glazing windows for my apartments in Toorak. I will not hesitate to recommend them to others.
My window is a custom project with very thick glass. The main reason is reducing noise as much as possible. So the job done perfectly. The result is amazing. Thanks to Vladimir and Co.
In-depth articles on the technical decisions behind a uPVC window order.
How the metallic coating on Low-E glass reflects heat, the difference between hard-coat and soft-coat, and why we use it on every double glazed unit we make.
Read articleThe honest comparison: thermal performance, acoustic results, heritage suitability, and cost. Which approach fits a Victorian-era home, and which does not.
Read articleSecondary glazing, DIY kits, Magnetite, polycarbonate panels, energy saving film and thermal curtains — what each actually does, where each makes sense, and where it doesn't.
Read articleThe 7-star NatHERS minimum, whole-window U-value targets, and SHGC limits new Melbourne builds must hit. What changed under NCC 2025, and how to spec windows that comply.
Read articleTell us your project (new build, renovation, or single room) and we will contact you back within 24 hours.
For detailed pricing, head to our double glazed windows cost guide. For project case studies and floorplans, see our recent Melbourne projects. For acoustic performance data on busy roads or under flight paths, read about our soundproof window range.
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