Heritage Trade Frames reports growth for Stellar bi-fold

Trade fabricator, Heritage Trade Frames has reported sustained growth for its Stellar Slimline bi-fold door, with sales increasing by more than 55% over a three-year period.

Lee Darcy, Sales and Marketing Manager at Heritage Trade Frames, said: “Sales of the Stellar Slimline Bifold Door have continued to grow throughout 2025. This sustained growth reflects the increasing interest in aluminium products, combined with the clear advantages of the Stellar Slimline Bifold Door itself.”

The door delivers contemporary aesthetics, with slim 117mm meeting stiles that create clean, attractive sightlines. It also meets the latest Part L requirements for thermal efficiency, featuring standard 28mm double glazing and achieving U values as low as 1.0 W/m²K when triple glazed.

Installation is another key advantage. Thanks to Stellar’s trademark design features, the door can reportedly be installed up to 20 minutes per pane faster. Patented pre-gasketed knock-in beads make glazing quicker and easier, while also delivering a neat, consistent gasket line that enhances the finished appearance.

According to Heritage Trade Frames, installers also benefit from Heritage’s responsive customer service and technical expertise, alongside ongoing investment in staff training, machinery and IT systems.

Lee concluded: “The continued growth of the Stellar Slimline bi-fold door underlines the value of offering products that perform for both installers and homeowners. It’s a product that fits well with where the market is heading, and one that we expect to remain a strong part of our portfolio going forward.”