Sash window locks: are your windows secure?

Traditional sash windows are common across older Birmingham properties, and they're also a well-known weak point for burglars if they haven't been properly secured.

The original problem

Many original sash windows rely on a simple fitch fastener — a small rotating catch — which offers almost no resistance to someone forcing the two sashes apart from outside with a thin tool.

Sash stops and window restrictors

Sash stops limit how far the window can open, useful for ventilation without full access, while still allowing full opening with a key when needed.

Dedicated sash window locks

Purpose-made sash locks bolt the two sashes together with a key-operated mechanism, offering far more resistance than a standard fitch fastener while still being unobtrusive on period frames.

Balancing security and appearance

If you're in a conservation area or simply want to keep the period character of your windows, there are discreet lock options designed specifically not to look out of place on original joinery.

If you're not sure whether your current sash window fastenings actually offer any real security, it's worth having them looked at alongside your door locks.