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.
What the assessment actually involves.
It starts with more than a quick look at the handle. Every assessment follows the same nine-stage assessment process, because that is the only way to quote accurately.
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. Only once that cross-check is complete do we provide an accurate quotation.
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
Cause, not just symptom
Pro-Lock checks the complete doorset and aims to return it to operation as intended by the manufacturer, rather than treating only the immediate symptom. This helps prevent unnecessary stress transferring to mechanical components, reduces the cycle of repeat repairs, and maximises long-term reliability and service life.
Your assessment is carried out by an experienced engineer, not a salesman. We complete an in-depth assessment of all aspects of your bifold doorset, talk you through the findings while we are on site, and provide the information in the report that accompanies the quotation for any repairs recommended.
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 ↗