Behind the Design: How We Develop High-Performance Bi-Fold Door Systems at Debar

The most successful bi-fold door systems are the result of close collaboration, specialist engineering and rigorous testing. A deep understanding of what fabricators, system houses, and extruders need from their products also refines the design process.

At Debar, we’ve spent decades specialising in bi-fold systems, and one of the things that sets us apart is our ability to design solutions around our customers’ exact requirements and market demands.

Through continuous innovation, we support fabricators, system houses and extruders in meeting growing demand for larger, slimmer and more efficient bi-fold systems

Whether we’re developing bespoke hardware for an existing profile, creating a completely new system from scratch, or providing an off-the-shelf solution that’s ready to go, our process is built around delivering products that perform in the real world.

Every project starts with understanding exactly what our customer is trying to achieve.

Generally, we work on three types of projects with systems houses, fabricators and extruders around the world. Some systems houses want us to design hardware around an existing profile system. Whereas some fabricators require a complete aluminium bi-fold system solution, including both profiles and hardware, particularly when they don’t have extensive technical design expertise in-house. We also offer proven, ready-to-market systems that can be adopted quickly, and white-labelled to suit the client.

For customers who already have an aluminium profile they want to retain, we begin by reviewing their technical drawings and understanding the limitations and opportunities within the existing design. Our engineering team will then assess the system, identify what will and won’t work, and then develop hardware specifically for that profile.

Once we have an initial design, we present it to the customer for review and feedback before moving forward with development.

This collaborative approach allows us to create solutions that fit seamlessly into the customer’s manufacturing process while delivering the performance improvements they are looking for, such as slim sightlines as low as 100mm or profiles as large as 3m tall.

After the design has been approved, our engineering team begins the detailed development phase. We use CAD and digital design software to create every component required for the system. Depending on the project, this can include hardware, castings, tooling, and even new aluminium profiles.

If a new profile is required, we design the dies that will be used by the extruder. Once the dies are manufactured, they are returned to us for inspection so we can ensure everything has been produced correctly before they are signed off.

Prototype development also plays a critical role at this stage as the goal is always to identify and resolve any potential issues before the system reaches production.

One of the biggest advantages of our design process is the amount of testing we conduct internally before a product reaches external certification.

Once prototype components are available, we produce initial batches that undergo extensive in-house testing. This includes cyclic testing, thermal performance assessments, finite element analysis (FEA), and operational tests to ensure the system performs as intended.

When we’re satisfied with the results, we build complete bi-fold systems using the new profile and hardware combination and carry out further testing internally. Only after these stages are complete do we move into independent third-party certification.

Different markets have very different requirements, and understanding those standards from the beginning is essential. German cyclic testing standards, for example, are particularly demanding, while projects in Florida may require compliance with Miami-Dade hurricane testing standards. Wind load and water penetration testing requirements also vary significantly across global markets.

As a global bi-fold system supplier, part of our role is helping customers understand these requirements and develop systems that can be certified efficiently for their target markets. Our team is comprised of business development managers who actively showcase our aluminium bi-fold systems and hardware solutions to customers worldwide.

Once a client is onboarded, they receive a dedicated account manager and a technical support team who work closely with the customer’s team. This ensures that the technicalities of the system are understood, and fabrication and installation is as simple and seamless as possible.

One of the recurring challenges we see within the industry is a lack of specialist bi-fold design expertise.

Historically, hardware innovation has also been limited. Many extruders have used similar hardware solutions for years, which means system development often focuses on profile changes such as sightlines rather than meaningful hardware upgrades.

Our specialist focus allows us to remove those limitations, by designing hardware specifically around the customer’s system. This means we’re able to help them develop products that are larger, stronger, more efficient, and better suited to modern market demands.

At Debar, we’re currently working on several new systems designed to operate across multiple regions and markets, allowing customers to adopt proven solutions with minimal disruption while maintaining their competitive advantage.

One of the most challenging aspects of bi-fold design is balancing multiple performance requirements at the same time.

Architects and developers increasingly want larger openings, slimmer sightlines, improved thermal performance, greater structural strength, and competitive pricing. Achieving all these objectives simultaneously requires careful engineering and sometimes, compromise.

For example, reducing sightlines can impact structural performance, while improving thermal efficiency may introduce manufacturing complexities. Every design decision must consider how it affects the wider system.

This is why we increasingly offer the flexibility to have multiple system profiles rather than a single solution intended to meet every requirement. Different projects and markets demand different priorities, and successful system design requires flexibility.

The future of bi-fold design is being shaped by a combination of architectural trends, evolving regulations, and changing customer expectations.

Across international markets, we’re seeing growing demand for larger glazed openings and taller door systems. This trend is particularly evident in large-scale residential and commercial developments where architects are seeking to maximise natural light.

At the same time, customers continue to demand slimmer sightlines and improved thermal performance, creating increasingly complex engineering challenges.

To address these requirements, we’re continually developing new solutions and expanding our product portfolio. By staying proactive in our approach to design and development, we’re helping to shape the industry with better practice and better bi-fold door solutions.

If you’re interested in partnering with us, get in touch with our experts today.