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Commercial use

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Commercial projects


Bring Outside In Bifolding Doors

Bring Outside In

If you want to open up to 90% of your elevation an Aluminium Bifold Door from IQ Glass offers a modern, high-quality option in our sliding folding doors, suitable for large opening sizes and long elevations of sliding folding glass.

Bi-folding, sliding glass doors or are a popular option for modern living areas or spaces where the inside and out are to be merged. Slim square framing and a flush floor finish from inside to out are important factors in creating that merging of inside and out.

IQ offer a range of aluminium bifolding doors which includes various leading innovations in the market. Our range includes the Sieger Lux Bi-fold which boasts the slimmest sightline of any bifold door available. It also includes the Sieger Super Lux Bifold which is the world's tallest bifold, available up to 5m tall. 

With each system performance and design are key. We believe in a unique balance of the two which enables architects to achieve their design wishes with their project performance specifications.

There are a wide range of configurations that can be created with our aluminium sliding, folding glass door range to ensure that you get the maximum glass to frame ratio. Our aluminium bifold doors can be inward or outward folding, bi-parting, linear sliding or opening on the corner.

You can also create a flush threshold across the base aluminium frame with the integration of IQ’s flush threshold drainage channel which ensures water runoff from the sliding folding doors is drained away efficiently.

Bifold Door Design

The aluminium framing we use in our doors is fully thermally broken for an insulating glass wall that can open completely, bringing outdoor living spaces to form larger living spaces.

Our bi fold and patio door frames are suitable to hold either a double or triple glazed unit as required to achieve the thermal performance criteria you need on your project with a whole host of additional glass options available from low iron glass to solar control coatings.

Every junction and detail of our sliding folding doors are designed to maintain a modern, square edge finish to the frame and offer the slimmest frame junctions available for aluminium bifolding sliding glass doors. IQ Glass will detail and design all fixing and connection details in full as part of our in-house design service.

The modern aluminium framing used in these sliding folding doors can be powder coated any RAL colour to suit every building design.  There is a large range of ironmongery to choose from which is available to view at the Courtyard Showroom and Sky House Design Centre.

For a more traditional bifold door design, bespoke glazing bars can be integrated into the design to recreate a traditional timber or steel framed door system but with a durable, low maintenance finish suitable for all project types and designs.

We also offer a range of internal bifold doors

Bifold Door Design

Bifolding Doors at our Showroom

We have a wide range of bi-folding and patio door systems on show for you to see at our architectural glazing showroom in Amersham. Our systems are updated regularly in keeping with the ever advancing nature of aluminium system design.

Come along and see for yourself. To book your appointment visit the Contact Us page and see the ways you can get in touch with us. 

Steel Look Bifold Doors

An aluminium bifolding door is the best way to create a steel look bifold for internal to external use. The thermally broken profiles of our aluminium bifold doors ensure a high level of thermal performance whilst the lightweight nature of aluminium means the doors are effortless to open.

To create a steel look design we incorporate a bespoke glazing bar design into each bifolding door panel (to your specification) which creates the industrial aesthetic of a steel door in a bifold.

Thanks to our ultra slim bifold door profiles these steel look openings create an authentic design in doors that are thermally efficient, fully weather tight and long lasting.


worlds slimmest bifold door

For the Slimmest Sightlines

The Sieger Lux Bifold is the next generation in bi-folding door systems. The thermally broken aluminium frame has a profile width of only 30mm, making it the slimmest bi-folding door system available on the market.

When created into a bifolding leaf the overall double section of framing that creates the vertical junction is less than 75mm, this is nearly half the size of a traditional aluminium bifold system.

Even with this drastic reduction in framing size the Sieger Lux Bifold still maintains its high performance and insulation. Thanks to the full thermal break within the aluminium profiles (combined with a well insulating double glazed unit) the system can achieve typical Uw values better than 1.6 W/m2K. The system is also fully tested for weather protection including air permeability, wind resistance and resistance to driving rain, achieving a water tightness class of up to 9A.

More information about the market’s slimmest bifolding door can be found on Sieger’s own website:

Sieger Lux Bifold Door, the slimmest bifold on the market

Alternatively, contact the team at IQ for specification and costing advice.


For the Tallest Bifold Door

The Sieger Super Lux is an advanced version of the Lux Bifold and is available in heights of up to 5m tall. This thermally broken aluminium door is then the tallest bifolding door system available on the market.

The fully tested and certified system is based on the slim Lux bifold but includes a stabilising wind post which allows the system to increase its maximum height from 3m to 5m.

All locking is integrated into the aluminium profiles and set at 1.1m from the ground level for easy access and opening.

With a maximum height of 5m, each pane can be up to 1.2m wide which allows you to achieve impressive elevations of glass that entirely fold and slide open.

The system is fully tested for weather protection and achieves a typical Uw value from 1.6 W/m2K depending on configuration and glass specification.

More information about the market’s tallest bifolding door can be found on Sieger’s own website:

Sieger Super Lux Bifold Door, the tallest bifold on the market

Alternatively, contact the team at IQ for specification and costing advice.

worlds tallest bifold door sieger super lux

ASK US ABOUT OUR Aluminium BiFold Doors


Commercial use

Commercial Bifold Doors

Aluminium Bifolds on Commercial Projects

Although bifolding doors are most commonly used for residential patio doors, these high performing systems can be expertly applied to larger commercial buildings.

Bifolding doors can be used to provide roof access, garden access or patio access. They are used very successfully to open the internal areas of cafes or leisure facilities to the outside with a simple slide of the panels.

For more information about how our aluminium bifold doors can be integrated into your commercial building project visit our dedicated website: www.iqprojectsuk.com or speak to a member of our technical team today.


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