Aluminium bi-folding doors are evolving. Today’s systems need to be smarter, stronger, and simpler to work with, all while delivering on thermal performance, aesthetics, and ease of installation.
The Decalu88 Bi-Fold from Deceuninck Aluminium is a system built to meet these expectations. Pre-gasketed as standard and capable of achieving U-values as low as 0.68W/m²K, it’s helping fabricators reduce callbacks, speed up production, and offer a premium product that installers and end-users love.
Precision meets practicality
What sets the Decalu88 apart starts at the factory floor. The system arrives pre-gasketed as standard, using co-extruded EPDM gaskets inserted during manufacture. That single design decision removes one of the most time-consuming and failure-prone steps in traditional aluminium fabrication: manual gasket insertion.
The result is less handling, fewer errors, and a far faster route from assembly to install. It’s also a fix for one of the most common issues in bi-folding doors, gasket shrinkage over time, which often leads to costly and frustrating return visits.
“The gasket is one of the first things that lets you down on a bi-fold,” says Darren Woodcock, General Manager at Deceuninck Aluminium. “With Decalu88, that problem’s already solved. It’s pre-inserted, won’t shrink, and it saves serious time in both fabrication and fitting.”
That efficiency doesn’t stop in production. The same modular thinking that defines the wider Decalu range applies here, with shared components and simplified stockholding that keep operations lean without compromising performance.
Real-world thermal performance
As the market shifts towards more stringent thermal requirements, the Decalu88 is ahead of the curve. The system can accommodate sealed units up to 62mm, offering thermal performance down to 0.68W/m²K, comfortably within the anticipated requirements of the Future Homes Standard.
This is made possible by a deeper thermal break and intelligent design choices that support high-spec glass without the weight and performance trade-offs seen in older systems. And because the rollers and hardware are rated to take sashes up to 200kg, it maintains smooth, reliable operation even with triple-glazed or laminated units.
It’s a specification that balances energy efficiency, acoustic comfort, and day-to-day durability, with no need to compromise on size or aesthetic.
Design flexibility without compromise
For installers and homeowners alike, visual appeal remains key.
The Decalu88 delivers with slim sightlines, clean stacking and the ability to achieve a 3.6m opening with just three panels, eliminating the need for a fourth sash and allowing for a sleeker, more desirable finish.
Each sash stacks in the same direction, giving a uniform look and reducing visual clutter. The result is a smoother opening motion, a more balanced appearance, and fewer complications during installation.
For fabricators like Spectral Windows, the benefits have been clear.
“We’ve had zero issues with dropped sashes or anything going out of alignment,” says Nick Rudd, Director at Spectral. “Compared to other systems we’ve used, it’s just simpler. It saves us time in production, and it’s easy for our installers to fit.
“That makes a big difference.”
A system built with the fabricator in mind
Behind the Decalu88 is a renewed focus on support. Deceuninck Aluminium has strengthened its UK-based technical team and invested in local stockholding to ensure faster lead times and greater flexibility.
That service-driven approach is underpinned by a product designed to remove friction at every stage.
“This isn’t just about product performance, it’s about fabricator performance,” adds Darren. “We’ve created a system that’s easy to make, easy to install, and robust enough to handle what the market’s asking for now, and what it will demand next.”
From its modular construction to its premium-grade finish and high-performance credentials, the Decalu88 Bi-Fold is a solution that fabricators can trust, and one that installers want to keep using.
In a market that demands more from every product, the Decalu88 shows what can happen when thoughtful engineering meets real-world needs. It’s not about reinventing the bi-folding door; it’s about making one that performs better, lasts longer, and fits effortlessly into today’s way of working.
For more information call 01249 816 969, email info@deceuninck.co.uk or visit www.deceuninckaluminium.co.uk