Stiff sash lock on a Victorian terraced house
Common on Victorian terraced houses across Tower Hamlets — the timber door has moved seasonally and the mortice case has bound against the keep. We often see this coupled with worn Yale nightlatches on Victorian Whitechapel and Stepney terraces. 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.