Stiff sash lock on a Victorian Tyneside flat-over-flat terrace
Common on Victorian Tyneside flat-over-flat terraces across Newcastle upon Tyne — the timber door has moved seasonally and the mortice case has bound against the keep. We often see this coupled with worn mortice locks on Victorian Tyneside flat-over-flat terraces requiring replacement. 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.