Stiff sash lock on a Victorian sandstone tenement flat
Common on Victorian sandstone tenement flats across Dundee — the timber door has moved seasonally and the mortice case has bound against the keep. We often see this coupled with traditional 2-lever and 5-lever mortice lock replacements on Victorian sandstone tenement closes. 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.