Robust UK has introduced a new adjustable door head extension system designed to improve the installation quality of non-certified steel doorsets. Available free of charge on request, the new solution helps installers manage gaps of up to 15mm between the frame header and the structural opening.

Unlike traditional methods that rely on frame packers, spacers, or mastic to conceal installation gaps, Robust UK’s adjustable extension system creates a cleaner and more professional finish. The company says the innovation not only enhances aesthetics but also helps reduce the risk of costly remakes caused by inaccurate site measurements or uneven structural openings.

The adjustable head extensions are fitted using jacking screws and can be trimmed on-site to achieve an exact fit. According to the company, the system increases allowable gap tolerance from 10mm to 15mm, enabling installers to complete projects more efficiently while maintaining a high-quality appearance. By eliminating the need for mastic application, projects can also avoid delays and additional labour requirements.

Paul Williams, commercial director at Robust, said the new development was created in direct response to customer demand for a more flexible installation solution capable of overcoming mis-measurements and difficult site conditions while still delivering an aesthetically pleasing result.