Stiff sash lock on a Victorian hillside terraced houses in cotton-mill worker row
Common on Victorian hillside terraced houses in cotton-mill worker rows across Oldham — the timber door has moved seasonally and the mortice case has bound against the keep. We often see this coupled with mortice lock failures on hillside Victorian terraces where frames flex under subsidence pressure. The fix is either service (lubricate and adjust) or replace with a BS3621 equivalent if the existing lock is pre-standard.
Our approach Service first if the mechanism is sound; BS3621 upgrade if the existing lock is sub-standard or worn beyond service.