Stiff sash lock on a Georgian New Town tenement
Common on Georgian New Town tenements across Edinburgh — 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 and Georgian stone tenements 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.