New adjustable door head extensions launched by Robust UK

May 7, 2026
New adjustable door head extensions launched by Robust UK

Robust UK now offers adjustable head extensions free of charge on all non-certified door-sets on request.

This innovative solution is designed to cover gaps of up to 15mm between the frame header and the structural opening.

Unlike conventional solutions such as spacers and mastic that simply fill gaps, the adjustable frame header extension is said to create a professional-looking installation, every time, enhancing the overall appearance.

According to the company, fitters will welcome the fact that the adjustable extensions for door headers avoid the need for frame packers and dispensing of the need for mastic will also ensure a more aesthetically pleasing result for the end customer.

Simple and efficient

Ultimately, Robust’s new adjustable header extensions are said to reduce the risk of remakes or unsightly gaps following site survey mis-measurements or in the instance of particularly out-of-square structural openings, supporting smoother project delivery and avoiding unnecessary cost.

Robust UK has articulated that the installation is simple and efficient thanks to the use of jacking screws and each unit is manufactured so that it can be trimmed on-site to the exact required length, ensuring a precise finish every time.

Previously, gaps of up to 10mm would have required filling with mastic, a process that could delay projects, look unsightly, increase costs and often involved specialist trades.

Robust’s new adjustable header extensions is said to eliminate these issues, and increases the gap tolerance by 5mm, allowing fitters to complete installations quickly and efficiently while maintaining a high-quality finish.

“Adjustable head extensions”

Paul Williams, Commercial Director, Robust explained: “Our new adjustable head extensions provide installers and project managers with the ability to achieve an aesthetically pleasing finish to a doorset, even on challenging projects.

“It was developed in response to customer requests for a completely flexible solution, allowing customers to overcome any issues with mis-measurements up to 15mm between the frame header and structural opening.”

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