What is Low-E Glass and Why It Matters
The metallic coating on Low-E glass reflects radiant heat back into the room in winter and away from the room in summer. We use it on every double glazed unit we manufacture. Here's why.
Read articleWindow replacement in Melbourne, custom-built and installed by our own crews. We replace aluminium, timber, or single-glazed windows with 70mm uPVC double glazed frames sized to fit your existing opening, whether you're doing a full window frame replacement or simply changing window frames to a thermally better material. Manufactured at our Cheltenham factory, fitted Melbourne-wide, glazed on site, 10-year warranty.
If you've been putting up with rattling sashes, fogged glass, draughts that ignore the curtains, or aluminium frames that conduct cold straight into your living room, it's probably time. Replacing windows in a Melbourne home is one of the highest-impact single upgrades you can make: it changes daily comfort, ongoing energy bills, exterior noise, and the way the front of your house presents. We replace windows across every Melbourne suburb, from Victorian terraces to mid-century brick homes to contemporary apartments, with high-thermal-efficiency European uPVC frames, Australian-made double glazed units, and finishes that match (or quietly outperform) your existing aesthetic.
Lower heating & cooling bills the moment the new windows are sealed in.
Acoustic-grade glazing for tram lines, flight paths, and chatty neighbours.
uPVC frames don't warp, rot, or need repainting. They outlast the trends.
Frames, hardware, and installation, all covered in writing.
No cold spots in winter. No radiant heat in summer. Calm, even temperatures across every room.
If your windows are under ten years old and the issue is cosmetic or mechanical, repair is usually the right call. If they're older, fogged, or draughty, replacement is the call, and the savings (energy, noise, sanity) start the day they're installed.
Not sure which side you're on? Our free site visit gives you an honest assessment; we'll tell you to repair when repair is the right call.
Every replacement project follows the same disciplined sequence. We measure twice. We cut once. We're not making coffee tables.
We visit your home, measure and photograph each opening, and talk through style, glass spec, and frame colour. No-obligation written quote within 48 hours.
Your windows are built to the exact dimensions of your openings in our Bayside workshop using Deceuninck Legend Art uPVC profiles, factory-welded at 245°C, with double glazed argon-filled units and German Siegenia / Roto hardware. We buy 100% GreenPower accredited renewable electricity to match our electricity use.
On install day, our crew carefully removes your existing frames and glass. Old materials are taken offsite for recycling. We tape, drop-sheet, and protect your interior, and your new windows are always glazed the same day, so you're never left with an open hole overnight.
The new frames are levelled, packed, and fixed into the prepared opening. Glass is site-glazed into each frame for the cleanest possible finish. Every install uses toughened safety glass across all windows and doors as standard, with no exceptions and no compromise on safety.
Double-sealed with water-resistant expandable insulation foam. Primed pine reveals and architraves installed; we don't use MDF. External cover strips fitted, then caulked with silicone, nail holes gapped. All openable sashes installed, tested, and adjusted.
We sweep up, take everything away, and walk you through how each window operates. Nothing left in the driveway; the cleaning point in our reviews is hard-earned.
The single most common project we run: removing original aluminium frames (typical of homes built between 1960 and 2000) or tired timber frames (older period homes) and replacing them with custom uPVC double glazed windows that fit the existing opening. No structural changes. No oversized opening cuts. Same look, dramatically different performance.
| Performance | Existing Aluminium | Existing Timber | Replacement uPVC DG |
|---|---|---|---|
| Whole-window U-value | 5.0–6.0 W/m²K | 2.0–3.5 W/m²K | From 1.1 W/m²K |
| Acoustic rating (Rw) | Rw 25–28 | Rw 27–30 | Rw 32–46 with upgrade |
| Coastal / salt resistance | Corrodes | Rots | Immune to both |
| Thermal bridging | High (conducts cold) | Natural insulator | None (insulator) |
| Maintenance | Wash, repaint joints | Sand & repaint every 5–7 yrs | Wipe clean, that's it |
| NCC 2022 / 2025 compliance | Generally fails 7-star | Generally fails 7-star | Meets or exceeds 7-star |
Replacing aluminium or timber frames usually requires no permit and no structural change: we measure your existing opening and build to fit. Most aluminium- or timber-to-uPVC swaps complete in 4–5 days for a full home.
"Window frame replacement" can mean two different things, and they are not the same project. Full replacement removes the frame and the glass and installs a new sealed uPVC unit. Glass-only retrofit replaces just the glass while leaving the original frame in place. Here's the honest comparison.
Modern uPVC double glazed windows are sealed units, factory-welded at 245°C. The frame corners are heat-fused into a single rigid weld, and the insulated glass unit (IGU) is bonded into a multi-chambered extrusion engineered specifically to hold the glass at the right depth, with the right gasket geometry, drainage paths, and hardware mounting points.
Retrofit suppliers usually replace only the glass, leaving the original frame in place. It's cheaper upfront, but the results vary considerably and the thermal performance can never match a full replacement (the old frame is still leaking heat, even with new glass).
A complete frame-and-glass replacement costs roughly 30% more than a glass-only retrofit, but delivers far better thermal, acoustic, and longevity results that hold up for decades. Most homeowners who retrofit eventually move to full replacement anyway, which makes retrofit the more expensive option in the long run, just delayed.
It costs less than a new kitchen, more than a new kettle. Pricing depends on size, glass specification, frame style, and installation access. We provide free, itemised written quotes with no estimates and no surprises. For detailed price ranges, configurations, and worked examples:
See our window replacement cost guide →We replace windows across Melbourne metro and the Mornington Peninsula. Cheltenham factory means short lead times to bayside, south-east, inner east, inner south, and CBD. North and west Melbourne are covered too: we travel.
Don't see your suburb? We service all Melbourne metro,drop us a line and we'll confirm within 24 hours.
A snapshot of recent replacement projects across Melbourne. Browse the full project gallery for floorplans, before / after photos, and specs.
Our uPVC frames are multi-chambered, thermally broken by design, and available in a range of standard colours. Choose single-sided (white interior, colour exterior) or double-sided (matching colour inside and out).
Independent reviews from recent window replacement projects across Melbourne. For the full set, see our reviews page.
Vlad replaced all our windows with double glazing about 4 years ago. GREAT job. We recently had a stone from a lawn mower crack one of them. His product support is excellent, glazed panel replaced economically and promptly with minimum fuss. Vlad is great to deal with.
Our apartment block recently had all timber window and door frames replaced by Vladimir and team and I highly recommend them! I obtained over 8 quotes for our block but found the product (uPVC) and service that Vladimir offered to be the best. Insulation has improved significantly and they were very efficient on day/s of install. Look no further!
I had a triple-glazed window supplied and installed by Windows Republic, and I couldn't be happier with the result. Their pricing was the best I found, and the quality of the window is outstanding. The installation was done perfectly: clean, professional, and with great attention to detail. Vladimir was fantastic to deal with from start to finish.
Vladimir founded Windows Republic in Cheltenham, Victoria in 2016 and has personally overseen the company's window replacement projects across Melbourne for over a decade. With a Bachelor of Business & Commerce, an MBA, and direct hands-on experience replacing aluminium, timber, and steel-framed windows in homes from Victorian-era terraces to contemporary builds, his expertise covers every common Melbourne replacement scenario. Every Windows Republic frame is manufactured to AS 2047 in Cheltenham, glazed on site, and installed by Windows Republic's own crew with no subcontractors.
First published: 9 April 2026 ·
Last reviewed for accuracy: 15 May 2026.
All process timings, pricing ranges, and standards references reflect Windows Republic's current 2026 Melbourne project data. Technical claims are cross-referenced against
NCC 2022 (Vol. 2),
AS 2047:2014, and
WERS.
Articles to read before you replace.
The metallic coating on Low-E glass reflects radiant heat back into the room in winter and away from the room in summer. We use it on every double glazed unit we manufacture. Here's why.
Read articleIf you're choosing between bolting on secondary glazing or replacing the windows entirely, this is the honest comparison: thermal performance, acoustic results, heritage suitability, cost, and lifespan.
Read articleMandatory ventilated wall cavities and condensation management rules for Melbourne homes. What NCC 2025 changes for window replacement and why uPVC double glazing is the most future-proof spec.
Read articleTell us your project (one window, ten windows, full home, heritage, modern, anything). We'll come measure, quote, and contact you back within 24 hours.
For our full uPVC range and product types, see the uPVC Windows Melbourne hub. For detailed pricing and worked examples, see the window replacement cost guide. For acoustic-grade replacements on busy roads or under flight paths, see our soundproof window range.
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