Question 1

How much does it cost to replace a window in Berwick?

Accepted Answer

A single standard-size aluminium window in Berwick runs $400–$1,200 supplied and installed depending on size, style and glazing. Awning windows sit at the lower end, double-hung and sliding sashes mid-range, large picture windows at the top. Adding double-glazing is an extra $300–$500 per window. Sliding doors run $2,500–$4,000 for a 2.4m two-panel unit, $5,000–$8,000 for a 3.6m three-panel bifold. A typical full-house re-window across 12–15 openings in a 1990s–2010s Berwick home lands at $12,000–$25,000 installed, including removal of the old frames and patch-back of the architraves and reveals.

Question 2

Single-glaze or double-glaze — what's right for a Berwick home?

Accepted Answer

For most City of Casey homes built between 1990 and 2010, the existing single-glaze aluminium frames are the single biggest source of winter heat loss and summer heat gain. Double-glazing (two panes of glass with a sealed air gap) cuts heat transfer by roughly 50–60% over single-glaze. In Berwick's cold winter mornings — where condensation on the inside of single-glazed windows is the giveaway — double-glazing also dramatically reduces internal moisture and the mould that follows. The premium is $300–$500 per window. On a full-house re-window it adds $4,000–$7,000 to the project but pays back in heating-and-cooling savings over 8–12 years, plus quieter rooms (great if you're near Princes Highway, Clyde Road or the freeway) and a more comfortable house every day in between.

Question 3

Aluminium vs timber windows in Berwick — which should I pick?

Accepted Answer

Aluminium is the default for nine in ten Berwick replacements: powder-coated frames, slim sightlines, AS 2047 compliant by default, low maintenance, lower price ($400–$1,200/window). Timber windows are the right call for two situations: (1) heritage-period houses in old Berwick where the original cottage windows were timber sash and council planning prefers a like-for-like replacement; (2) high-end new builds where the warm look of solid timber inside is a deliberate design choice. Timber costs roughly 60–100% more than aluminium ($800–$2,400/window) and needs repainting every 8–12 years. We supply both — happy to walk through which suits your house at the on-site measure.

Question 4

Full frame replacement vs glass-only — what's the difference?

Accepted Answer

Glass-only (or sash-only) replacement is when the existing frame stays and we replace just the glass panes or the operable sash. It's cheaper ($200–$400/window) but only works if the existing frame is structurally sound, the rubber seals are intact, and the frame style is one we can match parts for. Full frame replacement removes the old frame back to the brick reveal or timber stud, fits a new frame, re-seals the perimeter and patches the architraves. It costs more but solves the underlying problem: in 90s–2010s aluminium frames around Berwick the perimeter seals fail first, the powder coat goes chalky next, and the rubber gaskets harden — replacing the glass doesn't fix any of that. About 85% of our Berwick jobs are full frame replacement.

Question 5

What's the lead time and install timeline for window replacement in Berwick?

Accepted Answer

From accepted quote to install: 4–8 weeks for standard aluminium windows, 6–10 weeks for double-glazed units, 8–12 weeks for timber. The wait is manufacturing — windows are made to your exact opening measurements after the measure-up, not pulled from a warehouse. The install itself is quick: a single window 1–2 hours, a sliding door 3–4 hours, a full-house re-window of 12–15 windows is 2–4 days on site. We stage it so you're never more than a couple of hours with an opening unsealed — out with the old, in with the new, sealed and patched same day.

Question 6

Are condensation and mould on Berwick windows a window problem or a house problem?

Accepted Answer

Both. The cold-side surface of a single-glazed aluminium window in a Berwick winter morning sits at 3–6°C — well below the dew point of the air inside a heated house. Moisture condenses on the glass, runs down the frame, soaks into the timber reveal and architraves, and mould follows within a season. Double-glazing lifts that cold-side surface temperature to 12–15°C, well above the dew point — the condensation just doesn't form. That's why new builds with double-glazing rarely have window-condensation problems. If your reveals are already water-damaged, we replace those at the same time as the windows; trying to patch over wet timber is a waste of money.

Question 7

Do you handle the AS 2047 compliance and energy ratings?

Accepted Answer

Yes. AS 2047 is the Australian Standard for windows in residential buildings — it covers wind loads, water tightness, glass safety, and operating-force requirements. Every aluminium and timber window we install from Trend, Stegbar, AWS and similar tier-1 manufacturers ships AS 2047 compliant by default, with a stamped compliance certificate we hand over at completion. For new builds and additions we also handle the WERS (Window Energy Rating Scheme) U-value and SHGC numbers your building surveyor needs for the energy report. On straight replacements in existing houses you generally don't need a new energy report unless the council planning team asks for one (rare in Casey for like-for-like swaps).

Question 8

Which brands do you install?

Accepted Answer

For aluminium we install Trend, Stegbar, AWS (Architectural Window Systems), Wideline and Capral — tier-1 Australian manufacturers with 7–10 year warranties on the frame and 10–20 year on the IGU (insulated glass unit) seal. For timber we mainly use Stegbar Timber and Trend Timber. For sliding-door hardware we standardise on Centor and Brio for bifolds, Schlegel and CMI seals across the board. Brand choice for your job depends on opening size, style and budget — we'll bring sample frames to the measure-up so you can feel the difference in slide action and frame depth before you commit.

Berwick’s specialist window & sliding door replacement.

What window replacement costs in Berwick.

Five window & door formats.

Aluminium windows

Timber windows

Sliding doors

Bifold doors

Awning windows

Three things every Berwick window job needs to get right.

Measure twice, order once.

Berwick’s 1990s–2010s aluminium stock.

Brick veneer vs cladded walls.

Where we work.

From phone call to sealed-up windows — 5 stages.

Free measure-up

Fixed quote

Manufacture

Install

Handover

Ready for a free measure & quote?