Pro-Lock · Kent
Bifold door repair in Whitstable — seals losing contact
Bifold doorsets are not all built the same way, and it is the arrangement rather than the badge that decides how a fault behaves. Some systems hang the panels from a head track; others carry them on bottom rollers in the threshold, with the head track guiding rather than supporting. Which one a doorset uses is something the assessment establishes, because it changes what a draught actually means.
In Whitstable the fault we hear about most is a draught running along the closed edge of the doorset, often with a rattle or a whistle when the wind is up on this part of the coast. It rarely means a seal has simply failed. A seal only closes a gap while the panel presses against it evenly, and coastal wind makes an uneven contact far more noticeable.
Local fault emphasis
Seals losing contact: why Whitstable doors draw
A bifold seal is a compression joint. It works because the closing panel presses the rubber against the frame, and that pressure has to be consistent along the edge. Panel position, hinge condition and how the handles pull the leaves together all set that pressure. When the panel shifts, one part of the seal becomes over-compressed and another loses contact — and the gap opens where the contact has gone, not where the rubber has aged.
Replacing seals on that basis alone rarely holds, because a new seal will be compressed just as unevenly as the old one. The assessment looks at the panel position and closing pressure behind the seal first, and at whether the coastal wind is simply making a pre-existing gap easier to feel, before recommending any part.
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 Whitstable
Whitstable is about 4 kilometres from the coast. Its mean wind speed is about 6.39 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 3.6°C to 20.1°C, a spread of roughly 16 degrees.
Whitstable is famous for oysters, gathered from beds beyond the low-water mark from Roman times until the mid-20th century.
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 ↗