Double Glazed Windows and Doors for Strata Buildings and Unit Blocks
We replace windows and balcony doors across whole strata buildings in Sydney, the Central Coast, Newcastle and Wollongong, in double glazed uPVC or thermally broken aluminium. Proposals ready for your AGM, installation staged around residents, and one project manager from site walk to handover.
Built around how strata buildings make decisions
A window replacement in a unit block involves a committee, a strata manager, a budget and residents who still have to live there. We plan for all of them.
Strata managers
One contact, itemised proposals in a format you can send straight to the committee, and handover documents for the strata roll.
Committees
A clear recommendation for your building, samples to look at, and someone to answer owners' questions at the meeting if that helps.
Building managers
Access planned unit by unit, residents notified before each stage, and the site cleaned at the end of every day.
Unit owners
Single units replaced to match the building, with the product details the owners corporation needs to approve them.
uPVC or thermally broken aluminium, both double glazed
We usually recommend uPVC. Where aluminium suits the building better, we quote that instead.
uPVC windows and doors
Multi-chamber European profiles from Aluplast, Kömmerling, Deceuninck, Plustec and Schüco. The best insulation and noise reduction we offer: frame U-values as low as 0.77 W/m²K and up to 45dB with acoustic glass. They don't corrode in coastal air.
Why uPVCThermally broken aluminium
Alspec, Reynaers and Schüco thermally broken systems, all WERS-rated. Slim frames with an insulating break between inside and outside, the closest match to an original aluminium facade, suited to wide balcony doors and high wind-load elevations, powder coated to any colour.
Thermally broken aluminiumThe problems that bring strata buildings to us
Traffic and aircraft noise
Acoustic double glazing for units on main roads, rail lines and flight paths.
Acoustic windowsHeat, cold and condensation
Old single glazed aluminium frames heat units in summer, chill them in winter and leave wet sills that grow mould.
Apartment double glazingLeaking, sticking balcony doors
Worn rollers, failed seals and sills that let water in during a southerly.
Balcony doorsWindow safety devices
Compliant restrictors fitted on the openings that need them, recorded in the handover file.
Owners corporation guideA patchwork facade
Years of owner-by-owner replacements in different styles, brought back to one consistent look.
Whole-building replacementBudget and timing
Work staged across financial years to match the capital works fund, with the same frames throughout.
Funding and approvalsFrom first site walk to the last unit
Site Walk
We meet the strata manager or committee on site, look at every elevation and note access constraints.
AGM-Ready Proposal
An itemised proposal with product specification, staging options and price, formatted for committee papers.
Measure & Manufacture
Once approved, every opening is measured and the frames are made to fit, in uPVC or thermally broken aluminium.
Staged Installation
Our own installers work floor by floor around residents and hand over warranty and compliance documents at the end.
Lower energy use in every unit
Windows are where most apartments lose heat in winter and gain it in summer. Replacing single glazed aluminium with double glazed uPVC or thermally broken aluminium lowers the heating and cooling every household in the building needs. We are Sydney's only installer certified under the German Passive House standard, and we bring the same approach to strata work: the right glass for each elevation, a frame that insulates, and an installation sealed properly to the wall.
- Low-E glass specified by orientation, so west-facing units stay cooler
- Warm frames that stop condensation and the mould it feeds
- Long-life frames that don't need repainting or replacing again in a decade
Randwick: rusted steel windows to double glazed uPVC, with residents at home
The original steel windows in this Randwick block had seized with rust, and loose glass hung above the footpath. We replaced every window with double glazed Aluplast uPVC casements, with acoustic glass on the side facing the road.
- 6 weeks
- on site
- No scaffolding
- glazed from inside once each frame was in
- Residents stayed
- in their apartments throughout
Residents told us they can now hear their fridge running.Read the Randwick case study
Getting a window replacement through your next AGM
Whole-building replacement costs less per window than owner-by-owner work, keeps the facade uniform and settles the approval once. Projects can be staged across financial years to match the capital works fund.
Request a Strata ProposalAGM-Ready Proposals
Written quotes formatted for committee papers and owner meetings.
Staged Installation
Building-by-building, floor-by-floor scheduling around residents.
Trusted by strata committees and apartment owners
“Our new windows are installed and look fantastic. We have appreciated your professional and family friendly service. These old buildings are tricky and your team managed everything really well. I'm sure we'll call you again.”
“I can't speak more highly of Windows Factory and have no hesitation recommending them. Replaced all windows and balcony door in a 3 storey townhouse with double glazing and soundproofing, a unique job with design challenges that WF completely handled. Their prices reflect the high quality product and they have a great team, with Josh leading tradies who are reliable, diligent and trustworthy.”
“I can't believe how much these windows have changed my life. We're in a south facing apartment with no direct sun at any time of day - lovely in summer but cold in winter. Now we have double glazed windows, we can run the heater for an hour and it stays warm instead of leaking out the windows. Josh, Anton and the team have been a joy to work with.”
Sydney metro, the Central Coast, Newcastle and Wollongong
Guides for strata committees and owners
Comparing Strata Window Tenders After the Ruling on Chinese Aluminium Imports
A new ruling means importers of Chinese aluminium windows must lodge securities of up to 73.3%. Seven questions strata committees should ask before accepting a window replacement tender.
Caring for uPVC Windows: Simple Maintenance That Lasts Decades
uPVC windows are low maintenance, not no maintenance. A few simple habits keep them operating smoothly for their full lifespan.
What German Passive House Certification Means for Your Windows
Passive House is a defined, measurable standard, not a marketing phrase. Here is what it demands of a window and why it matters.
Request a proposal for your building
A few details are enough to start. Our strata team calls you within one business day to arrange a free site walk, then sends an itemised proposal you can table at your AGM.
- Free site walk, no obligation
- Itemised proposal ready to table at your AGM
- 10-year product warranty on every job
Replacing windows in one unit? Send us a quick message instead.