Stiff sash lock on a dense Victorian brick terraced houses (The Potteries)
Common on dense Victorian brick terraced houses (The Potteries) across Stoke-on-Trent — the timber door has moved seasonally and the mortice case has bound against the keep. We often see this coupled with three-lever mortice lock wear on Victorian terrace stock requiring upgrade to five-lever BS3621. 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.