Technical Glazing Terms

How to Specify a Gable End Window

Gable end windows can be incorporated in many styles, to suit any building design. Typically, a gable end window follows the roofline. Inviting an influx of natural light into top floor loft spaces that could otherwise be a dark, unused space


This style is often used in conjunction with other glazing techniques and products, the effect dependent on the number of floor levels and roof height. The gable end refers to the top part, directly underneath the roofline, the glazing used in conjunction with that could be anything from sliding doors to fixed panes.

This project consists of a gable end window in the loft area situated above large fixed panes and opening casement windows, offering ventilation and a striking glazed façade.

If a gable end window is integrated on the top floor of a multi-floor building, using floor to ceiling glass makes a dynamic impact.

Opt for a frameless design for the most seamless, sleek finish. IQ has developed its own in-house systems to ensure steel supports and fixings are completely concealed, delivering flawless results.


The ability to install these solutions with no visible framework enables us to match an existing building structure.

Working on heritage or listed building projects is one of IQ’s specialities and gable end window systems can be incorporated to bring a modern element and invite an influx of natural light, without detracting from a buildings historic structure.

Alternatively, a gable end window could be installed alongside other glazing elements as part of a new build’s glazing package, for a modern aesthetic.


One of the main benefits of specifying a gable end window is the massive amount of natural light gained. If a gable end window is specified in a loft area or top floor, that floor has the advantage of being brightly lit and offering uninterrupted views of its surroundings.

Consider a gable end window for a loft conversion project to create more useable space within a residential property. On a floor to ceiling glass façade or single storey area of the home, a gable end makes a space feel larger, creating bright open spaces.

When a gable end window is used in conjunction with an opening element, whether sliding or bifolding door, it creates an indoor-outdoor style of living. The advantages of indoor-outdoor living are endless and it has become a sought after, functional trend.

Design Details

Our window and door systems are thermally broken, making the areas suitable for year-round use, even decreasing energy bills in some cases.

Using solar control solutions like a solar control coating helps to ensure that the area behind the glazing would not overheat, reducing solar glare and ensuring comfortable temperatures and functional spaces regardless of the outside temperature.

Granting garden access underneath a gable end window with sliding or bifolding doors is a common way to maximize the amount of glass used on one side of a building.

panoramah! sliding door systems offer very slim sightlines, here the glazing was stepped over the floor levels to create a smooth, continuous aesthetic. Incorporating a glass opening seamlessly bridges the gap between indoor and outdoors, whilst retaining a minimalistic design.

If you would like further information about our architectural glazing solutions or want some advice when specifying a gable end window just get in touch with the team at IQ. 

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