Pro-Lock · Kent
Bifold door repair in Gravesend — hinge wear and pivot strain
Bifold doorsets are not all built the same way, and the arrangement decides how a fault behaves rather than the badge on the door. Some systems carry the panels from a head track; others run them on bottom rollers in the threshold, with the head track guiding rather than supporting. Which arrangement a doorset uses is something the assessment establishes, because it changes what a heavy panel or a dropping corner actually means.
In Gravesend the pattern we see most often is wear concentrated at the hinges and pivots rather than across the whole doorset. On a bifold, a small number of hinges carry the load of every panel and control how the leaves fold, so they take far more work than their size suggests, and they do it every time the door is opened.
Local fault emphasis
Hinge wear and pivot strain: why Gravesend panels begin to drop
A folding door turns at its pivots, and its panels swing on hinges while the load passes through the running gear. Those parts are in constant motion when the door is used, and unlike a seal or a lock they have no rest position. Wear here is gradual but cumulative: play develops first, then the panel stops sitting at the height it was set to, and the change is usually noticed as a corner dropping or a leaf that no longer lines up.
Replacing a hinge on its own rarely settles it. The pivot geometry sets where the hinge sits, so a hinge carrying a panel that has already moved will load unevenly from the first day. Our approach is to check the pivots, the running gear and the panel geometry together, then decide whether the hinges themselves need replacing or whether the strain on them has another cause.
Brands fitted locally
Bifold systems we assess across Kent
Bifold doors across Kent are fitted with hardware from a wide range of systems, and the components inside a doorset are frequently a mix rather than a single brand. The guides below cover the systems we are asked about most often, and each sets out how that manufacturer's running gear, locking and sealing details behave, and what tends to fail first.
Local conditions
Local conditions in Gravesend
Gravesend is about 2 kilometres from the coast. Its mean wind speed is about 5.44 m/s, against a range of 4.96 m/s at the most sheltered locations we cover to 6.63 m/s at the windiest. Its seasonal temperature range runs from about 0.4°C to 22.7°C, a spread of roughly 22 degrees.
Gravesend appears in the Domesday Book, and it has long been the point where the Thames narrows toward the estuary.
Pro-Lock repairs bifold doors; we do not sell new ones. That matters more than it sounds. A company that fits replacement doorsets has somewhere to send a problem a repair would have solved, and a recommendation is only as independent as the person giving it. We have nothing to upsell you, so the honest answer is also the only one available to us: if your doorset can be repaired, that is what we will quote for. Every assessment ends in a written report and an itemised quotation, the repair is booked separately and only if you decide to go ahead, and completed work is backed by a 12-month warranty.
Complete doorset overhauls may help where frame distortion exceeds tolerances or panel realignment cannot compensate; read the full explanation ↗
Toe and heel is checked when appropriate as part of alignment; understand toe and heel ↗
A clear first step
£79 professional assessment, credited against any repair, or refunded if we cannot quote. 12-month warranty on completed repair work.
Why do you charge £79 for an assessment when some companies offer free quotes?
An experienced engineer checks the complete doorset, explains the findings, and sets out the sensible repair route. Read the full explanation on the FAQ ↗