Henderson bifold door repair.
We regularly assess Henderson systems for timber movement, alignment and hardware faults.
Positioning
Henderson is a UK sliding and folding door hardware manufacturer whose Securefold Pro range is used for external folding doors; other Henderson products serve different applications. Pro-Lock treats the name as useful system context, then confirms the actual timber doorset, hardware and compatible parts on site. Henderson timber bifolds can be built by different fabricators around Henderson hardware.
Timber movement before hardware replacement — what we see most on Henderson doorsets
Timber does not stay exactly the same size throughout the year. Changes in humidity can affect the fit of panels, the relationship between panels and the amount of clearance available at hinges, pivots and meeting points. A door that has become tight in one season may not have a failed roller or hinge; the timber movement needs to be separated from a hardware fault before parts are chosen.
We look at whether the doorset has settled, whether the panels remain aligned and whether the movement is consistent across the opening. Hinges and pivots can wear or loosen, but replacing them will not correct a frame or panel that has moved. This is why alignment and the condition of the timber are checked before a component-led repair is recommended.
Henderson systems can also present a fault through the running gear: a roller may be worn, a fixing may have shifted, or a lock may be resisting because the panels are no longer meeting in the intended position. We test operation rather than relying on the appearance of the closed doors, checking the load through the pivots, rollers, hinges and locking points.
The repair route depends on that distinction. Where adjustment restores the intended alignment, parts may not be needed; where timber movement has put continuing strain on worn hardware, the quotation can identify both the underlying alignment work and the compatible replacement components.
How the assessment supports the right repair.
The assessment follows nine connected stages, from reviewing the doorset’s history and measuring its condition to checking operation, components and manufacturer tolerances. The findings give us a clear basis for an accurate quotation.
We start with the background and history of the doorset, then take extensive measurements for distortion and check the frame for square and twist. We test operation under load, check drainage paths, and inspect glazing, gaskets and packers. Where parts are involved, components and part numbers are verified against the manufacturer, and every measurement and observation is cross-checked against the manufacturer's recommended tolerances. After that cross-check, we provide an accurate quotation based on the assessment findings.
The full process is set out stage by stage on our How it works page.
Open the assessment processWhat we assess
- Fractured or damaged hinges
- Broken, worn, or disconnected rollers
- Dragging, dropped, or misaligned panels
- Panels catching the threshold or header
- Difficult closing or locking
- Faulty locks, cylinders, handles, keeps, tracks, guides, and seals
How the assessment supports lasting performance
Pro-Lock assesses the complete doorset and recommends repairs with the aim of returning it to operation as intended by the manufacturer. Understanding how the panels, running gear, seals, locks and frame work together helps reduce unnecessary strain on connected components, support reliable operation and minimise repeat repairs over the long term.
An experienced engineer assesses the complete bifold doorset, talks you through the findings on site, and provides a written report with a quotation for any recommended repairs.
The findings are followed by a comprehensive report and itemised quotation by email, with repairs arranged separately. No repair work is carried out during the assessment.
The £79 fee covers a professional bifold-door assessment of the complete doorset. £79 professional assessment, credited against any repair, or refunded if we cannot quote. 12 month warranty on completed repair work.
You do not need to identify your doorset first.
You do not need to identify your doorset before getting in touch. Many bifold doors are unbranded or contain a combination of components from different manufacturers. Identifying the system, cross-checking component and part availability, and sourcing suitable parts through our established European network of suppliers is our job. Pro-Lock regularly repairs bifold door systems that other repairers have classed as obsolete, where a suitable repair route can be identified.
Warranty
All work carried out is backed by our market-leading 12 month warranty, covering our workmanship and any parts supplied and fitted as part of the repair where applicable.
Recent repairs on Henderson doors
A five-panel timber Henderson doorset in Tonbridge was assessed with panels catching, locking and handle faults, a failing multipoint gearbox, loose pivot hinge fixings, a worn cylinder and damaged hinge collars. See the Tonbridge repair ↗
A four-panel timber Henderson doorset in Bury St Edmunds was assessed with failed pivot hinges causing major alignment issues and requiring full disassembly and reassembly. See the Bury St Edmunds repair ↗