Oversized Sliding Sash Window

Large sliding glass doors designed as a contemporary vertical sash window


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Large Sash Windows

The sliding door system can be designed to create large vertically sliding glass windows. These oversized vertical sash windows are impressive feats of glazing technology, pairing minimalist detailing with smooth action openings.

The large insulated glass units are available at sizes up to 29m2 that slide effortlessly upwards, creating a gravity defying elevation of glass.

The minimally framed opening system functions by connecting the vertically sliding glass units to an integrated and hidden pulley system. Through the engineering of counterweighting the glass panes can slide naturally upwards manually. Even with oversized glass units the system operation can be manual and smooth.

Vertical Sliding Window

With the use of ultra slim frames, these vertically sliding glass walls offer extremely minimal sightlines of only 20mm horizontally. All other surrounding framework is designed to be hidden by the building finishes for a modern yet beautifully simple window design.

These vertical sliding windows offer feelings of traditionalism with the smooth vertical sliding action of the opening. But the slim aluminium framing offers a modern design with sophisticated design and technological precision.

With panel sizes up to 29m2 per sliding pane architects can achieve impress widths of glass openings, allowing the use of minimally framed glazing as moveable glass walls.

As with all solutions from IQ's sliding range, the vertically sliding sash solution offers an architectural resolution that encompasses light and transparency, which is a key element of modern architecture.

Vertical Sash Windows at the Showroom

If you would like to see an oversized vertical sash window in a real-life situation, the newly renovated IQ showroom is now home to an automated vertical sash. 

Reaching a staggering height of 6.5m and a width of 3.4m, this impressive vertical sliding window solution is opened and closed at ease with just the push of a button. The motorised cantilever that is used for the automation moves these oversized glass panes slowly and smoothly with a dead man switch making it extremely easy to control. 

The vertical sash was installed alongside an oversized automated sliding door pane, also reaching 6.5m tall. Both systems were finished with a polyester powder coating in a colour known as Axalta Horizon. 

Click here to book your showroom visit today. 

For more information about the IQ showroom, click here.

Vertical Sash Window on ‘World’s Most Extraordinary Homes’

Vertically sliding glass walls inspire the world of architecture and design. The seemingly impossible is possible with vertical sliding sash solutions. This architecturally designed private home in Portugal was featured on the BBC show ‘World’s Most Extraordinary Homes’ and showcased numerous large vertical sash solutions.

On this project the counterweight system was exposed to add depth and impressive engineered detailing onto the external façade. The counterweights were expertly detailed by the architects Guedes Cruz in a specific material which offered texture and depth.

The exposed engineering was a key design detail on this project which merged industrial details of concrete and steel with the minimalism of glass.

Speak to IQ about Oversized Sash Windows 

If you have any questions about the use of these oversized sash windows, including cost, details and possibilities, contact the team at IQ here.

Our technical team are on hand to answer any questions.


Counter-weighted Sash Window

The vertically sliding solution operates via a hidden counterweighted system. This pulley-weight solution is hidden within the head of the sliding glass wall with full design details available for CAD integration.

Vertically sliding glass moves smoothly via a multiple pane connection through this internal counterweight system. Two or more sliding glass panes can be used within each elevation.

When opened, the large sliding glass panes free a large portion of the building envelope helping architects to design an unbound spatial experience. The horizontal aluminium profiles offer a 20mm sightline for double height elevation of glass with maximum transparency.

Operation on the majority of installations can be manual via this internal pulley system however motorised opination is also possible.

Glass and Performance

The framing sizes, depths, performances, and glass rebates for these vertical sliders is inherited from the base minimalist slider.

The vertical sash system is available as standard in a double sliding sash where both the top and bottom pane slide. You can also specify a fixed + sliding + fixed configuration where the middle pane opens. These configurations are predetermined and established; however various other sliding configurations are possible on investigation.

Three pane vertical sliders that span multiple floors are possible as well as minimal sliding units that create Juliet balcony structures.

Find Out More about Sash Windows

These bespoke oversized sash windows are made to specification and detailed individually for each project. To find out more about these sash windows and how they can be used on your project, contact the team at IQ here.

Or call us on 01494 722 880.

Further Reading

How to Choose the Right Window

What should you consider when choosing the right window? 

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Oversized Glazing Projects

A selection of our completed projects showcasing the use of oversized glazing. 

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Glazing for Double Height Windows

What options do you have when creating a double height window? 

Read more