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Taking Strata Window and Door Installation to a new level

Strata window and door specialists

Industry experts for over 36 years, we pride ourselves on delivering quality solutions and the peace of mind for owners and strata managers.

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Windowline’s ultimate guide to a stress-free window and door replacement projects

This guide brings together our top insights, tips and practical steps — everything you need to make your replacement project clearer, easier and far less stressful.

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Featured projects

We’ve completed over 8,500 window and door replacement jobs.

Here are some of our recent projects.

Celebrating over 36 years in business

Windowline was started by Gary Stevenson in Sydney in 1989. At that time, he realised clients wanted the peace of mind that they were getting window and door solutions that were not only the best quality, but the best value for your money.

Windowline’s focus has always been to provide a service that exceeds our clients’ expectations along with a result you’ll be delighted with for many years to come. It’s a commitment that’s been at the heart of our business for more than 36 years.

Our Services

The Windowline way

Strata specialists for over 36 years
Choice of products from all suppliers
Outstanding safety record
High quality products and workmanship
Personalised client service

Windowline are the trusted leaders in Window and Door replacement projects.

Over our 36 years in the industry we have successfully completed 8500+ strata building projects, delivering quality solutions and peace of mind for owners and strata managers.

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Adam Hadley profile picture
Adam Hadley
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Installation was very fast and professional, only one installer arrived at 7am and they were done by 3, great work. However, it has been weeks since installation was finished and there is still fencing around some debris, blocking an external path and access to bins.
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david gv profile picture
david gv
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We recently replaced 4 windows on our 8th-floor apartment: 2 sliding and 2 sash (job no. 9172). Overall, a good experience. Pros: • Professional and fast installation with a clean finish. • Sliding windows (double-glass) have excellent noise insulation. • Good post-installation follow-up and support. Cons: • Communication after signing the contract was slightly difficult. When asking questions to the person that did the check measure, he was rude and not keen on smooth communication. • The contract you sign says that they can confidently install the windows without breaking any tiles. After the contract is signed, they request you to remove the tiles prior to the installation of the windows. Now we need to retile our bathrooms. • Sash windows have no counterweights, so they’re either too stiff to open or slide up on their own. We specifically asked about how easy to operate they would be prior to signing the contract and we were assured they would be smooth to operate. Overall: Happy with the result and would recommend, but make sure to get all details in writing first and I would not install sash windows if I could choose.
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Ravi Sharma profile picture
Ravi Sharma
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Very nice work very friendly worker on unit 7
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Jan Kadlec profile picture
Jan Kadlec
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DON’T WALK, RUN away from this company! They are just replacing the windows on our building (small dwelling) and it’s a complete DISASTER! One of the most incompetent and disorganised companies I’ve ever seen. All tenants are furious. The list on complaints is huge, just to mention few: - Broken glass and debris left in places where people, including small children walk (entrance, common areas, staircase, etc.). - Zero notice period when they will commence work on a particular unit. When asked, the workers don’t know. They just randomly knock on doors at 7:00- 7:30am and demand access. So the tenants are expected to take time of work at no notice and swiftly move/ cover their furniture and belongings not to hinder the work. - For example, they confirmed the work Thursday afternoon (night before), knowing the weather forecast was showing chances of rain. Yet, no mention of weather dependency. Brief, light rain in the morning, claiming the short, light rain prevented them from replacing the windows facing the balcony which are well protected (stayed dry)?! It took us few hours to remove and cover the furniture to protect from debris and dust. Now we have to live in such conditions until Monday. Put simply, they used the light rain as an excuse to take Friday off and left us hanging. No apology, no help, no sympathy. There were other cases like this. - In general, apartments left dirty since they don’t use drop sheets or vacuum clean after the work, etc. Some damage to the interior walls and furniture. - Workers smoke outside and leave cigarette butts all around the building. - Blocked off access to the mailboxes for post deliveries. - Any feedback or request for information, the workers shrug their shoulders, and the manager ignores. - And the windows themselves? Definitely better than the old, already rotten ones. But not top quality. Mediocre at best. The aluminium frames are cut and left with some sharp edges, so we’ll have to file them or protect somehow so that children don’t get cut. There are some silicone smudges and dirty fingerprints on the frames, windows or walls. Sure, we’ll clean them ourselves. We knew it wouldn’t be easy, especially just before Christmas. All tenants were positive, cooperative, helpful and understanding. But enough is enough. Save yourself the troubles and choose another company.
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Alex Fiebig profile picture
Alex Fiebig
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The windows were replaced… that’s the only good thing I have to say. It was done very poorly. Marks all over the walls, screws still hanging out of the window sills and pencil marks and stains all over them. The apartment was left in a huge mess and their muddy boots were worn all through the carpet. They also, didn’t tell us when they were coming until the day before and they said “you better have everything moved for us to come at 7am tomorrow “.
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Ella Foth profile picture
Ella Foth
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Windows were quickly replaced without much hassle. However our apartment was with dust absolutely everywhere, and windows looked unfinished. Additionally communication on when the windows were being replaced wasn’t great. (Unit 7).
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Russell Potts profile picture
Russell Potts
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Worked really quickly and efficiently. We're great to deal with and cleaned up after their work.
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James Baxter profile picture
James Baxter
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Very happy with the replacement windows installed. There was a delay outside of their control but the new windows have improved our insulation for better temperature control and we can barely hear any outside noise when windows are closed.
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Johanna Kay Tran profile picture
Johanna Kay Tran
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We’ve had our windows installed by Windowline over three stages since 2023, and the whole process has been really good. The coordination and communication have always been great with Julie from there office and they even gave us the option to add fly screens along the way. In the last stage, Scott did the installation and did an excellent job — everything was finished neatly and works perfectly. We also had our balcony door replaced by Windowline about two years ago, and it’s made such a difference in keeping the cold out of the apartment. Big thanks as well to CF Strata for engaging Windowline to do the window replacements — highly recommend! Big thank you from Unit 9
We work with all of Australia’s leading window and door manufacturers
G.James
AWS Architectural Window Systems
alspec Aluminium Systems Specialists
Breezeway
Aneeta
Veka

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