Acorn Window Replacement
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All around the inner suburbs of Sydney and Melbourne, pre- and post-WW2 homes were built with metal frame windows and a variety of window winders like the one you see above. Now, half a century later, these tired fittings are begging for retirement. At Acorn Window Winders, we are the undisputed experts on these window winders and their associated window locks.

Chances are you've been trying to find replacements for a while. My replacement winders are available to replace your old Roto Winders and others. Yes, they really are made in the USA and Acorn Window Winders has been installing them for over 30 years. We are exclusive Australian distributors for a range of brand new, latest technology replacements MADE IN THE USA.
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On almost every type of window we can fit a small, easy-to-use and unobtrusive Chubb lock. However, if your window has existing fly screens it is likely that the screens will not be compatible with the new lock. If we are not installing locks - just fitting winders - then your existing fly screens can be retained.
Reviews (6)
Laura Easton
Laura Easton
Aug 23, 2021
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I would highly recommend Clement Windows. We required windows to match existing for our extension and french doors. We were so pleased with the result and service from Clement, we updated the existing single glazed to double glazed. The windows for the extension required new frames, which Clement measured and gave the carpenter details of changes required for a good fit. This allowed the windows to go in seamlessly. The replacement windows needed to go into existing frames, which again, Clement checked and measured, and the result was the crittall frames fitted perfectly. The team are courteous
Paul Solomons
Paul Solomons
Jul 06, 2021
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I have recently had some windows supplied and fitted by Clement. The company is fantastic to deal with. The whole team are amazing and are matched by the high quality of their windows. I have no hesitation in recommending Clement and cannot speak highly enough about them.
Tom Robbins
Tom Robbins
Feb 04, 2021
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Clement did the steel windows with leaded lights set into oak sub frames for an Arts and Craft house that Pearce Bottomley Architects worked on in Weetwood, Leeds. We built an orangery there as well as the garage and kitchen conversion and Clement replaced the windows throughout the existing house as well as supplying the new fanlights for the orangery.
We specify Clements conservation roof lights whenever we can. I am very much of the opinion that they are the best on the market.
Janine Dykes
Janine Dykes
Sep 26, 2020
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We ordered roof lights from Clement for our barn conversion. We used them as they were the most reasonably priced conservation roof lights we could find. The order process was easy and personal, they arrived on time and we absolutely them now they are in. I cannot recommend this company or their products enough.
Duncan MacBrayne
Duncan MacBrayne
Jul 02, 2020
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I have worked with The Clement Windows Group for almost 10 years now on various projects liaising in particular wit Tess Clement. Their quality, attention to detail and service have always been outstanding. I can't recommend them highly enough
Duncan MacBrayne, Reading.
Hamish Bailey
Hamish Bailey
Nov 23, 2019
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I chose Clement steel windows for their quality and their suitability for our period property. I found Clement easy to deal with and their staff knowledgeable, courteous and professional. Delivery was made on time and now in stalled they look great and work very well.
I would have no hesitation in recommending them for similar residential projects.