Sieger HD Casement Window

For a modern and minimal aluminium window system that can reach impressive sizes, the Sieger HD Window is the perfect choice. 


This heavy duty window system is able to reach impressive sightlines whilst maintaining a slim, square-edged aluminium profile. The modern design is ideal for any architectural style and with impressive weather and performance values can enhance any building project. 

Flexibility is key when it comes to specifying bespoke glazing systems, and this aluminium window has a wide range of configurations options, frame finishes and ironmongery, allowing each window to be manufactured to fit specific design requirements. 

Frame Depth: 58/70mm

Max Size: side hung 900mm x 1800mm / tilt and turn 1400mm x 2400mm / view data sheet for more info

Configurations: top hung / side hung / fixed / bottom hung / and more

Typical Glass Spec: 6mm – 16mm argon gas cavity – 6mm

Performance: air (4), water (9a), wind (2400 Pa)

Security: PAS 24 

aluminium multi-light window arrangement with top hung and fixed casement windows

For unparalleled performance levels, the system has been expertly engineered and undergone full weather testing, surpassing requirements. A thermally broken aluminium frame and multi-point locking offering high thermal performance levels and security for your home.

With eight different handle options to choose from, as well as frame finishes in over 200 RAL colours and a variety of glazing options, this aluminium window system is designed completely bespoke for each project.

Contact the team to discuss the full range of options.

See These at the Showroom

Come to the Sieger Showroom to see these aluminium windows in person. Just click the link at the bottom of the page to request an appointment or call the team who would be happy to help.

Request a Quotation

We would be happy to create a quotation for your project requirements. Click the link at the bottom of the page to request a quotation or speak to a member of the team to run through your specific project requirements. We can help tailor your glass package to ensure you achieve the design, performance and budget requirements for your project.

Visit our Showroom

The Sky House Design Centre

We are here to help. Contact us for Quotations, Technical Information, General Information and more.

What would you like to contact us about?