Bifold doors — sometimes called folding sliding doors — are made up of multiple door panels that fold back on themselves in a concertina style. Unlike sliding doors that move sideways on a track, bifolds fold neatly away to one side, creating a wide, unobstructed opening.
This design allows maximum flexibility: doors can open inward or outward, depending on space and layout, and homeowners can choose the number of panels to suit their property.
How Do Aluminium Bifold Doors Work?
Aluminium bifold doors operate on a gliding track system, allowing the panels to slide and fold smoothly. When fully open, the panels stack neatly at the edge of the frame. When closed, they align seamlessly to form a secure, energy-efficient wall of glass.
Some bifold doors configurations can have an access, traffic or pedestrian door. This is a door that opens independently allowing for convenient everyday entry and exit without needing to fold or unfold the whole set. Often a traffic doors is located at one side, but it can also be in the middle.
Modern aluminium systems, such as those from Sheerline and Cortizo, feature:
- Slim frames for uninterrupted views.
- Durable hardware designed for frequent use.
- Multi-point locking systems for enhanced security.
- Thermally broken aluminium profiles for excellent energy efficiency.
For installers, these systems are engineered for straightforward fitting, while homeowners benefit from low maintenance and long-lasting performance.
Benefits of Aluminium Bifold Doors
Whether you’re specifying for a residential home or a commercial project, aluminium bifold doors deliver a host of advantages:
1.Seamless Indoor-Outdoor Living
Perfect for kitchens, living rooms, or commercial spaces, bifold doors create a natural flow between the inside and outside. In summer, they can be fully opened to connect with a garden, patio, or terrace.
2. Slim Sightlines and Natural Light
Aluminium frames are stronger than timber or uPVC, which means they can hold larger panes of glass with slimmer profiles. Both Sheerline and Cortizo doors maximise daylight and views without compromising strength.
3. Energy Efficiency
Thanks to advanced thermal breaks and the option of double or triple glazing, aluminium bifold doors deliver excellent U-values, keeping interiors comfortable year-round while helping reduce energy bills.
4. Security and Durability
Aluminium is naturally strong and resistant to warping, rotting, or fading. With multi-point locking mechanisms and toughened or laminated glass, homeowners get peace of mind and long-lasting security.
5. Flexible Design Options
Available in a wide range of RAL colours, finishes, and configurations, bifold doors can be tailored to suit any property. Choose from 2 to 7 panels, different opening directions, and bespoke sizes for total design freedom.
Sheerline and Cortizo: Leading Aluminium Bifold Systems
At Direct Roofing Systems, we proudly supply bifold doors from two of the most respected aluminium systems houses:
- Sheerline Bifold Doors – British-designed with exceptional thermal performance and a choice of contemporary finishes. Engineered for security and energy efficiency with Sheerline’s unique Thermlock® technology.
- Cortizo Bifold Doors – A globally recognised brand offering robust, modern designs with ultra-slim sightlines, large panel sizes, and versatile configurations to suit even the most ambitious architectural projects.
Both brands deliver premium solutions for trade installers and homeowners who want lasting performance without compromising on aesthetics.
Are Bifold Doors Right for Your Project?
If your customer is looking for more natural light, better access to the garden, or a sleek alternative to sliding or French doors, bifold doors are a perfect option. For homeowners, they offer style, practicality, and year-round comfort. For installers, they provide a high-value product that’s easy to recommend and install.
Our expert team is on hand to guide you through product options, specifications, and installation support – call us on 01623 702611
