Why Mortice Locks and Yale Nightlatches Work Together
Most timber front doors in the Slough area are fitted with two separate locking mechanisms that complement each other. The Yale-type nightlatch — the spring-loaded lock that catches automatically when you pull the door shut — provides convenience for everyday use. The 5-lever mortice deadlock, let into the body of the door itself, provides the serious security layer. When both are present and in good condition, the door is significantly harder to force than it would be with either lock alone. Insurers know this, which is why many household policies in the UK specify that the main entrance door must have a mortice deadlock that meets BS3621. If your policy contains that clause and your lock does not carry the BS3621 kitemark, a claim could be reduced or refused.
A mortice deadlock that meets BS3621 must pass rigorous tests covering bolt strength, pick resistance, and key security. Five levers are the minimum for BS3621 compliance on a timber door. Our technicians verify the standard before recommending a replacement, and we fit only locks that genuinely carry the kitemark — not lookalike products that simply resemble a compliant lock. If you are unsure whether your current lock qualifies, call us on 01753 251949 and we will advise you honestly before any work is agreed.
