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 sags, rubs, sticks or has uneven gaps around the opening or the door closes poorly despite an otherwise sound visible opening. Causes: loose fixings, minor alignment drift or ordinary timber movement or normal wear in hinges, latches or compatible mechanical hardware.
A replacement rail or insert needs the correct shape and dimensions. Provide the system reference where available. Similar-looking tracks may support different rollers, so a generic strip should not be assumed to be a suitable repair for every sliding door.
Loose or damaged fixings can affect the running surface. Accessible fixing points need sound support for ordinary work to proceed. Deterioration beneath the rail may require a different assessment; covering it with a new section does not restore an unsound base.
adjust and retain suitable existing hardware. replace an identified compatible component after measuring the existing item. Limits: Accessible non-structural running rails only. No threshold waterproofing alterations, drainage-system redesign, structural changes, major glazing or powered operators.