uPVC double glazed sliding windows — horizontal-sliding (“windows that slide”) manufactured at our Cheltenham factory since 2016. Smooth single-hand operation, up to 34 dB noise reduction, and dramatically lower energy bills — without the maintenance of aluminium sliding windows or timber.
Sliding windows — also called horizontal sliding windows, slider windows, or simply “windows that slide” — operate on a horizontal track. One or more sashes glide sideways past a fixed pane (a sliding glass window), creating an opening for ventilation without swinging inward or outward. Precision rollers sit in a stainless-steel track, allowing the sash to move with minimal friction and one-hand operation.
This horizontal action makes sliding windows the preferred choice where space is limited — a sliding kitchen window above the sink, a laundry window opening onto a walkway, or a bedroom slider where curtains hang close to the glass. Unlike casement or awning windows, a slider requires zero clearance outside the wall — nothing protrudes into a walkway, patio, or garden bed.
Modern uPVC sliding windows are a significant step up from the aluminium sliders in most Melbourne homes built between the 1970s and 2000s. Those older frames conduct heat directly through the metal, rattle in the wind, and offer almost no acoustic insulation. A uPVC slider with double glazing eliminates all three problems — and makes sliding window replacement a one-for-one swap with no structural rework.
Every configuration is custom-sized to your exact measurements. Manufactured at our Cheltenham factory.
One fixed pane, one sliding sash. The most common configuration — ideal for bedrooms, kitchens, and standard openings.
Three tracks — master slides first, interlocks middle, both travel together. Step-like stack opens two-thirds of the frame.
Four panels — fixed panes on each side, two centre sashes slide apart. Symmetrical opening, maximum ventilation.
Aluminium conducts heat at ~200 W/m·K vs uPVC at 0.17 W/m·K — over a thousand-fold difference that shows up in your energy bills.
| Feature | uPVC (Windows Republic) | Aluminium |
|---|---|---|
| Thermal insulation | U-value from 1.8 W/m²K | U-value 4.5–6.0 W/m²K |
| Condensation | Warm frame — minimal | Cold frame — frequent |
| Noise reduction | Up to 34 dB (STC 32+) | 25–28 dB typical |
| Maintenance | Wipe clean — no painting | Oxidises, needs recoating |
| Colour stability | UV-stabilised white · Renolit FX laminated colours | Powder coat fades, chips and flakes over time |
| Roller longevity | Rigid frame — rollers last 15–20+ years | Frame flex and rail corrosion reduce roller life |
| Australian Made | Cheltenham, VIC | Often imported |
Every sliding window from our Cheltenham factory is double glazed as standard. Two panes of glass separated by a 12–16 mm argon-filled cavity, sealed with a warm-edge spacer bar and low-E coating.
Argon gas and low-E coating reduce heat transfer by up to 70% vs single glazing. Melbourne’s wild temperature swings — from frost at dawn to 35°C by lunch — are exactly the conditions where double glazing earns its keep.
Up to 34 dB reduction as standard, or 40 dB+ with acoustic laminated glass. If you live near a tram line in Brunswick, a flight path in Essendon, or a busy arterial in Glen Waverley — that’s the difference between hearing every truck brake and sleeping through the night.
The warm-edge spacer and uPVC frame keep the interior glass above dew point, virtually eliminating condensation and mould in normal conditions. Cold aluminium frames act as thermal bridges, pulling heat out and attracting moisture — uPVC breaks that cycle.
No single “best” window — the right choice depends on the room. Many Melbourne homes use a mix.
| Feature | Sliding | Casement | Awning | Tilt & Turn |
|---|---|---|---|---|
| Operation | Horizontal glide | Side-hinged swing | Top-hinged, tilts out | Tilt in or swing in |
| Space required | None | Clearance outside | Clearance outside | Clearance inside |
| Max ventilation | Up to 50% | Up to 100% | ~30% | Up to 100% |
| Flyscreen | Fixed — always in place | Retractable needed | Retractable needed | Fixed — always in place |
| Best rooms | Kitchen, laundry, bedroom | Living, feature | Bathroom, high openings | Living, bedrooms |
Every sliding window is built at our Cheltenham factory, 20 km south-east of Melbourne’s CBD — not imported, not rebranded.
Windows are typically the weakest thermal link in any home. Understanding the standards ensures a compliant, future-proof investment.
Older aluminium sliders could be lifted off their tracks. Our uPVC sliding windows eliminate those vulnerabilities.
Sash locks at multiple points along its height.
All sliding windows accept retractable fly screens for insect-free ventilation.
Integrated into frame to prevent sash removal.
Glass fitted from inside — not removable from exterior.
Holds together when broken, preventing entry.
All windows accept aftermarket screens and grilles.
All prices for uPVC double glazed sliding windows, fully installed — including removal, fitting, sealing, reveals, and clean-up.
| Window Type | Installed Price | Notes |
|---|---|---|
| Two-panel slider (standard) | $2,800 – $3,500 | Most common — bedrooms, kitchens |
| Three-panel slider | $3,400 – $4,400 | Wider openings, living areas |
| Double slider (both operable) | $3,100 – $4,000 | Maximum ventilation |
| Acoustic upgrade (laminated) | + $200 – $400 | Recommended near busy roads |
Prices from our Melbourne Pricing Guide 2026. Every quote is fixed-price — no surprises.
Recent sliding window installations across Melbourne — Thornbury, Beaumaris, Rosebud and more.
uPVC sliding windows need minimal maintenance — no painting, no oiling hinges. A few minutes each season keeps them perfect for decades.
Clean tracks — Vacuum debris, wipe with damp cloth. Built-up grit is the #1 cause of stiff sliding.
Wipe frames — Soft cloth, warm soapy water. Never use abrasive cleaners or solvents.
Lubricate rollers — Light silicone spray. Avoid oil-based lubricants — they attract dust.
Check weatherseals — Inspect weatherpile strips for compression or wear.
Casement, awning, fixed, and more
Learn more →uPVC double glazed sliding & lift-and-slide
Learn more →Dual-mode European windows
Learn more →Specialist acoustic glazing
Learn more →Maximum thermal & acoustic performance
Learn more →Heritage style, modern performance
Learn more →Free measure and quote — no obligation. Call or request online.
Visit our showroom in Cheltenham to see and operate our sliding windows in person. Compare profiles, glass options, colours, and hardware. Open Monday to Friday 9 am–5 pm, Saturday and Sunday by appointment.
Get directions → · 14B Viking Court, Cheltenham VIC 3192 · 1300 040 480
Reviewed by the Windows Republic technical team — Australian Made licensed uPVC window manufacturer since 2016. Master Builders Victoria member. Certified Deceuninck profile fabricator.
Technical specifications on this page reference the National Construction Code 2025 (ABCB), WERS energy rating protocols administered by AGWA, AS 2047:2014 (Windows and external glazed doors in buildings), and AS 3959:2018 (Construction of buildings in bushfire-prone areas).
Page last reviewed: . Pricing valid for Melbourne metropolitan installations in 2026.
