Stiff sash lock on a Georgian terraced town house
Common on Georgian terraced town houses across York — the timber door has moved seasonally and the mortice case has bound against the keep. We often see this coupled with sash window fastener failures on Georgian and Victorian terraces requiring specialist fitting. 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.