When selecting a mortice lock, one of the first decisions is whether to choose a sashlock or a deadlock. While both offer excellent security, they serve slightly different purposes and suit different door applications. Understanding the distinction helps you make the right choice for your property.
What Is a Deadlock?
A mortice deadlock is a key-operated lock with no handle or latch mechanism. The bolt is thrown and withdrawn solely by turning the key. Deadlocks are typically used alongside a separate door handle or nightlatch, providing additional security rather than primary latching function.
What Is a Sashlock?
A mortice sashlock combines a locking bolt with a spring-loaded latch. The latch keeps the door closed without needing to be locked, while the bolt provides security when engaged. Sashlocks are often used as the primary lock on internal doors or as secondary locks on external doors.
Key Differences
- Latch function: Sashlocks include a latch; deadlocks do not
- Installation: Sashlocks require additional handle holes; deadlocks need only the keyhole
- Security focus: Deadlocks provide pure security; sashlocks offer convenience plus security
- Insurance requirements: Many insurers specify 5-lever deadlocks for final exit doors
- Cost: Sashlocks are generally slightly more expensive due to additional components
When to Choose Each
Choose a deadlock for final exit doors, high-security rooms, and anywhere you need maximum protection without daily latching requirements. Choose a sashlock for internal office doors, bedroom doors requiring privacy, and secondary external doors where you want the convenience of a latch.
Expert Installation
Keys4U's locksmiths can assess your specific door and security requirements to recommend the ideal mortice lock type. Proper installation is critical for both security and smooth operation, and our team ensures every lock meets British Standard specifications where required.
Get expert advice on choosing the right mortice lock. Call 033 3305 2993.