Aluminium Flush Sash Windows

Aluminium Flush Sash Windows

Project Description

Aluminium Flush Sash Windows

Offer your customer the perfect timber window replacement with our Aluminium Flush Sash Windows. Each window is manufactured with to the finest level of quality in our dedicated aluminium factory in Portsmouth and delivered on time to meet your delivery needs.

As an AluK fabricator, Window Warehouse offers expert advice for demanding commercial projects or domestic installations. We manufacture a range of AluK products, so you can use Window Warehouse as your one-stop-shop for your glazing needs. Each product is made to improve your customer’s home and our aluminium flush sash windows can be designed to your customer’s needs.

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Our Aluminium Flush Sash Windows are designed to enhance any type of project. Whether you’re looking for a window to replace timber products at a older property, or something sleek for a new build, the aluminium flush sash windows are the best choice. We manufacture the market-leading AluK Optio 58BW system, a product designed for faster fabrication and still offering your customer a range of benefits. This window will help bring your customer’s home or the building you installing in into the 21st-century. Improved security, increased thermal efficiency, weatherproofing and a customisable design are just some of the benefits.

  • Designed for faster manufacturing with crimped or mechanical cleat corner options
  • 9 Different Configuration Options
  • 45mm Slim Sash offering minimal aesthetic
  • Matches other AluK aluminium windows & doors
  • Quality Thermal Performance With U-values of 1.5 W/m2K
  • Glazing options from 24mm to 35mm triple glazed units
  • Top Hung & Side Hung Configurations
  • Greater weather performance with friction stays

If you’re looking to offer your customer the perfect replacement window, these aluminium flush sash windows are the ideal option. To place an order or find out more, you can call us at 02392 327 744, email us or fill out an online quote.

Like the look of our Aluminium Flush Sash Windows?

Get in contact today for free, no obligation quote or to find out how you can offer Window Warehouse double glazing to your customers.

Thermally Efficient Design

Through choosing Window Warehouse’s range of aluminium flush sash windows, you’ll be able to save your customer money on their energy bills. Although aluminium previously had a reputation for not being thermally efficient, the Aluk Optio 58BW Flush design does not offer any problems. These windows can achieve U-values of 1.5W/m2K with double glazing and WER ratings of B-C. With triple glazing, these ratings can be improved, helping to reduce your customer’s reliance upon their central heating, leading to lower energy bills.

We also manufacture our aluminium flush sash windows to protect your customer’s home from the elements. These aluminium flush sash windows are built to Class 4 for Air Permeability and Class 9a for Water Tightness. The acoustic performance of RW 42 ensures that loud noises will be kept outside the property and the homeowner’s peace will not be disrupted.

Window Warehouse

Aluminium Window Security and Hardware


With our aluminium flush sash windows, you can provide your customer complete peace of mind that their products will secure their home. These windows have been designed to withstand modern burglary methods & hold a Q-mark certification.

Despite having a slim frame, aluminium as a material offers a great level of strength and rigidity. We increase this by fitting multi-point locking across the frame of our aluminium flush sash windows. This removes any potential weak points that could be exploited by would-be intruders.

By choosing Window Warehouse for our flush sash aluminium windows, you can provide your customer complete peace of mind that you’re securing their home.

Security options from Window Warehouse

Colour Options

Aluminium window colour samples

There is a huge choice of over 400 colour options for our aluminium flush sash windows, including gloss, matt, metallic, anodised and the stunning PWF wood finish. The Qualicoat surface finish is maintenance free and scratch resistant.

As we manufacture our aluminium flush sash windows with the colour imbued within the material, your customer can enjoy lasing quality. They won’t ever have to worry about repainting the window. All our double glazing has been built to last and accompanied by a guarantee of quality. This makes it easier for our customers to win jobs and give their customers the complete confidence to go ahead with their installation.

Aluminium Flush Sash Window Prices

If you’d like to offer your customer’s high quality products, such as our aluminium flush sash windows, then become a Window Warehouse installer today. To find out more, you can call us on 02392 327 744, fill out our online contact form, or email us.

For those looking to place an order, drop us an email or fill out a free online quote.

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ALuk window systems window technical datasheet

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About Us

Malcolm Cake started Window Warehouse in 1986 and over 30 years later we are still serving some of our original customers. We are one of Halo’s longest standing trade fabricators and manufacture in Portsmouth.


We test our products to PAS 24 standards, meeting the latest Document Q Building Regulation requirements for new buildings.

Independent Network

Since 1996 over 230,000 homeowners have chosen a Network VEKA approved installer to fit their windows or doors. Now developed into the Independent Network, Window Warehouse is an Approved Trade Fabricator so talk to us about our outstanding installer support.


Our team is on hand to give you all the support you need. Our experts can give you technical and installation advice and offer we professional marketing and business support with our exclusive Haven retail brand promoted across Hampshire and the South Coast.

Quality First

Our windows and doors are manufactured to ISO 9001  2015 Quality Assurance and CENSolutions CMS Mark (CMS 6023W): Factory Production Control System compliance to EN 14351-1:2006. All our products also hold the CE Marking certification.
Halo from Window Warehouse

Halo Installer Scheme

Powerful marketing support and exclusive sales leads in your area are two advantages of the free-to-join Halo Approved Installer Scheme. As one of the longest standing Halo Trade Fabricator partners Window Warehouse.