UK Doors Online, part of UKO Group, has announced a major enhancement to its aluminium product portfolio with the full transition to high‑performance Cortizo systems across its window and door portfolio.

According to UK Doors Online, this marks a significant step forward, delivering enhanced performance, refined aesthetics, and a smoother, more installer-friendly experience.

At the heart of the transition is a new generation of aluminium bi-fold and patio door systems, alongside the window range.

UK Doors Online is said to be the first to launch this new Cortizo bi-fold system in the UK. The bi-fold system offers even slimmer sightlines, now 100mm, reduced from 107mm, for a cleaner, more contemporary look. The system also brings back the pre‑gasketed clip‑in bead, designed to improve performance and simplify installation.

The updated aluminium window collection is now available in flush, standard and heritage styles. When paired with energy‑efficient glazing, the windows can achieve U‑values as low as 1.0 W/(m²K).

Expanding the range further, UK Doors Online have also introduced the new Cortizo 4900 sliding patio system. Featuring slim 35mm interlocks and a fully beaded design, it is designed to enable faster installations while achieving U-values from 1.2 W/(m²K).

Colin McCabe, group manufacturing lead, UKO Group said:

“Cortizo allows us to deliver higher performance and a better‑looking product without complicating installation or increasing costs. It’s exactly the kind of step forward we want to bring to our customers.”