the latch, handle, hinge or ordinary running hardware no longer lines up or operates normally. Repair an accepted accessible rail or fit a compatible running insert or replacement section without changing the building envelope.
Signs: the door closes poorly despite an otherwise sound visible opening or the door sags, rubs, sticks or has uneven gaps around the opening. Causes: normal wear in hinges, latches or compatible mechanical hardware or loose fixings, minor alignment drift or ordinary timber movement.
The extent of wear, available parts and access affect the choice. A small repair may be reasonable on an otherwise sound compatible rail. If replacement requires specialist panel handling or rebuilding the threshold, it falls beyond the ordinary task offered here.
The agreed repair is checked with the accepted panel and its hardware. Catching at one point can differ from resistance along the entire run. Any roller or alignment work should be listed separately so a track-only quote does not imply every movement problem will disappear.
Keep the rail clear and check travel after the agreed work. Report recurrent catching so the remaining cause can be reviewed. Limits: Accessible non-structural running rails only. No threshold waterproofing alterations, drainage-system redesign, structural changes, major glazing or powered operators.