Aluminium windows – ultra-slim & symmetrical

What sets our aluminium windows apart

Minimalist, slim design: All opening types – windows, fixed glazing, sliding doors – feature consistently ultra-slim frames with a visible width of just 53 mm, both on the outside and inside.
Uncompromisingly symmetrical: The design is uncompromisingly symmetrical – all four sides of the frame are equally narrow – inspired by the look of a picture frame.

Wide range of design options: Our aluminium windows offer a wide range of surface designs – wood or glass. The application can even be selected after installation.
Uniform product families: Our aluminium windows, patio doors, fixed glazing and sliding doors all feature the same design signature and look as if they were made from a single mould.

Discover our aluminium windows

ONE

Aluminium

Extremely slim, uncompromisingly symmetrical

Discover ONE

Advantages of our aluminium windows

Less is more

Our aluminium windows impress with their minimalist design, which is reduced to the essentials.

Maximum minimalism

The high-end FixFrame ONE S sliding door combines frameless glass elements with uncompromising symmetrical slimness and complete accessibility – for homes with particularly high aesthetic standards.

Large dimensions

Aluminium windows and patio doors can be manufactured up to a height of 3 metres. Sliding doors up to 3.2 metres and fixed glazing up to 4.5 metres in height as standard.

Versatile interior

Choose from aluminium or with solid wood or glass applications. Find out more about other materials that are also available on site.

Uniform handle design

The handles on our aluminium windows can also be used on lift-and-slide doors, house doors and interior doors – all from a single source.

Everything fits together

Our aluminium windows, patio doors, fixed glazing and sliding doors all feature the same design signature. Even the insect screens and handles are coordinated down to the last detail.

Inspiration for aluminium windows

Vineyard house

Villa Blickfang Traunsee

Magic Cube

Haus Sch

Bungalow S

Villa KG

All references

FAQs about aluminium windows

What is an aluminium window?

An aluminium window is a window with an aluminium frame, a lightweight and durable metal that is characterised by its stability, weather resistance and ease of maintenance. In addition, our aluminium windows are distinguished by their versatility on the inside, with applications made of wood or glass.

Aluminium-Fenster von Josko können bis zu 3 Meter hoch sein.

What is the maximum size of an aluminium window?

Josko aluminium windows can be up to 3 metres high.

How much does an aluminium window cost?

The price depends on the size, finish, glazing and design. As we manufacture all windows individually to measure, you will receive your personal quote after a consultation with a sales advisor in your area.

Are aluminium windows energy efficient?

Yes, our aluminium windows are energy efficient and have insulation values suitable for passive houses. They also come with triple glazing as standard.

How durable are aluminium windows?

Aluminium windows are particularly robust, durable and, with proper maintenance, retain their high-quality appearance for many years.

Are aluminium windows sustainable?

Yes, our aluminium windows impress with their exceptional durability and high energy efficiency. We focus on resource-saving manufacturing and only use aluminium with a 60% recycled content.