So WHY go with GEM Windows & Doors:
  • We make to order and keep STOCK!
  • We sell to retail customers at wholesale prices
  • We can quote on the spot or within 24 hours
  • Great value for money!
  • Australian manufactured product
  • Four great showrooms: Mascot, Castle Hill, Minto, and Kingswood - as well as a warehouse in Prestons
  • Over 55,000 orders filled since inception - that's a lot of happy customers!

Aluminium Windows & Doors Sydney

Aluminium Windows Sydney (Capral Urban Range)

Looking for Aluminium windows in Sydney? Well, have you come to the right place! GEM Windows & Doors Sydney is a fast growing, 100% Australian privately owned company.

We specialise in supplying directly to the public and offer standard size windows and doors as a cost saving alternative for aluminium sliding doors, stacking doors, sliding windows, awning windows and double hung windows. With four sizeable showrooms, in MascotCastle Hill, Kingswood and Minto, we have a wide range of aluminium windows and doors on display.  We also have a window and door warehouse in Prestons with over a 1000 aluminium sliding windows and doors in stock, available in 4 colours.

Our aluminium Capral (Urban) door and window range includes aluminium sliding doors, stacking doors, awning windows,  and sliding windows. We offer impeccable quality and present unbeatable value for both domestic and commercial requirements for small projects and larger scale developments of low density dwellings. With production being based in Sydney, we can offer competitive lead times of 1-4 weeks for residential windows and doors  and 4-6 weeks for our commercial look windows and doors in standard colours and glazing.

Bifold Doors & French Doors Sydney (Alspec Carinya Range)

Bifold doors are just the beginning at Gem Windows and Doors Sydney! We use an Australian designed, tested and manufactured aluminium window and door system by the leader in the market, Alspec, offering a wide range of modern designs with a quality finish. The full range of our aluminium bifold doors and windows can be viewed in the Bifold Doors section. If you are in a rush and need your windows or doors “yesterday”, in most cases we can accommodate such requests and turn around a bifold door or window order within 10 working days. Most frames will come assembled, panels glazed but loose for builder to hang after frame installation is complete. Our bifolds are bottom hung which allows versatility when it comes to both renovation jobs and brand new builds as it eliminates the need for heavy duty steel beams. We are also not too shy to boast about having some of the best prices in NSW for a similar product.

Custom Sized Doors and Windows!

With custom size products, you have the flexibility to nominate the exact frame size to fit your existing opening. If you are working on a new build project – you can take advantage and save our Standard Size aluminium windows and doors in both Residential and Semi-Commercial look ranges, as well as Double Glazed windows and doors.

Standard Size Doors & Windows

We specialise in supply only and cater to a wide range of needs when it comes to aluminium doors and windows. Our standard size range offers great savings, whether you are looking at replacing one window or all windows and doors in your home. Our custom range includes the Residential single and double glazed series, including sliding and stacking doors, sliding windows, awning windows and double hung windows. We also offer standard size commercial look products for residential application which include sliding and stacking doors, sliding windows and awning windows. Our commercial look standard size series can also be supplied with double glass and offers great value at a very competitive price. The full range, sizes, configurations and price list can be viewed in the Standard Price List section.

Why Use GEM Windows and Doors Sydney?

Our business model is built on turn over, therefore we are confident that when it comes to standard sizes our prices are the best in Sydney and even New South Wales. Our product is 100% Australian made, manufactured in Minto NSW and meets all the required standards. We deliver or allow pick up from our warehouse in Prestons which provides another opportunity to reduce your cost. We specialise in a standard range of items, with standard finishes and fixtures – we keep it simple and pass on the cost saving to our clients. We care about every order – whether it is one window or a house lot. Majority of our clients are DIYers and owner builders and we value all business regardless of the size.


GEM aluminium windows and doors are manufactured to the Australian standard to ensure compliance and quality assurance. In the Info & FAQ section you can review the frequently asked questions and answers and view additional information. If you know what you are after, request a quote on-line by filling out the quotation form. You can also contact us with any questions by calling our office or sending us an online contact form through our website.

We also invite you to visit our Sydney Door and Window Showrooms in MascotCastle Hill, Minto and Kingswood, where you can view the full range of windows and doors on offer, see the quality of the product, chat to us about your project, discuss pricing and request a quote.