Locksmiths nationwide are seeing a surge in callouts for sticking or unlockable doors, a problem attributed to the very hot weather experienced across much of the UK over recent months. Alan Hickman, a Bournemouth-based locksmith, reported what feels like double the usual number of calls, with customers unable to open or close doors until they cool down.
Steffan George, managing director of the Master Locksmith Association (MLA), confirmed this pattern is widespread, particularly in areas with the highest temperatures. An MLA Facebook post addressing uPVC door locking issues received tens of thousands of views, significantly more than typical traffic.
The issue stems from basic physics: heat causes materials to expand. uPVC and parts of composite doors can expand and bind with their frames, making them awkward to open. This is particularly common for south-facing or dark-coloured doors, which absorb more heat.
Conversely, wooden doors can shrink in high temperatures as moisture is drawn out, especially if not well-maintained. This can cause doors to drop, straining locks and making them stiff or impossible to operate. Shane Hales, an MLA-affiliated locksmith in Sidcup, Kent, noted his heat-related door adjustments have doubled this summer.
Locksmiths can typically fix sticking doors by realigning them or adjusting hinges. Experts advise seeking professional help promptly, as forcing a misaligned door can damage the lock and lead to more costly repairs.