Siegenia Aubi bifold door repair.
Siegenia-Aubi is a German hardware manufacturer whose folding gear is fitted into uPVC, timber, and aluminium bifold doorsets from many profile suppliers. The hardware itself is often the useful identification point rather than a badge on the doorset, so Pro-Lock inspects the rollers, hinges, locking gear, and threshold before confirming the fitted generation.
Positioning
Siegenia-Aubi makes folding and sliding hardware rather than complete bifold doorsets. PORTAL FS and related folding gear are fitted into timber, PVC and aluminium profiles, so both the hardware generation and the surrounding profile system matter.
Siegenia-Aubi PORTAL FS running gear, gear generation and profile interfaces — what we see most on Siegenia Aubi doorsets
A Siegenia-Aubi guide may be a bottom bogie or roller assembly, head guide, panel hinge, hook-bolt lock or handle gearbox within another manufacturer's doorset. The same hardware name can appear across different profiles, so we identify the actual generation and track before sourcing parts.
PORTAL FS spare-parts information distinguishes older and newer roller sets, including differences in track fit. A stiff or dropped panel therefore requires the running gear, guide rail, hinge pins and threshold alignment checked together rather than assuming a generic part will solve it.
Siegenia maintenance literature calls for clean running rails and acid-free, resin-free lubrication on the relevant moving and locking parts. We also check loose fixings, bent linkages and the relationship between the gear and its keeps, while recognising that profile distortion may be the real cause.
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 Siegenia hardware
A seven-panel uPVC doorset on Siegenia hardware in Dereham was assessed with doors that would not close or lock correctly, traced to the original installation where the double glazed units had not been toe and heeled. See the Dereham repair ↗