What Is a Sash Lock? Sash Lock vs Deadlock Explained
When choosing a lock for an internal or external door, understanding the difference between a sash lock and deadlock can help you select the right hardware for the job. Although both are commonly used with door handles and provide a secure locking point, they work differently and are designed for different applications.
What Is a Sash Lock?
A sash lock is a mortice lock that combines a latch and deadbolt within the same lock case. The latch allows the door to be opened and closed using a door handle, while the deadbolt provides additional security when the door is locked with a key.
This makes a sash lock a popular choice for internal doors where both everyday access and locking functionality are required. 5-lever sash locks, for example, are commonly specified for doors where a higher level of security is required.
What Is a Deadlock?
A deadlock is a lock that generally features a deadbolt operated by a key rather than a sprung latch. Unlike a sash lock, a standard deadlock does not have a latch operated by a door handle.
A deadlock front door application can provide a straightforward locking solution, particularly when used as part of a suitable external door locking arrangement. The correct lock should always be selected according to the door construction, security requirements and relevant installation specifications.
Difference Between Sash Lock and Deadlock
The main difference between a sash lock and deadlock is the way they operate:
| Feature | Sash Lock | Deadlock |
|---|---|---|
| Latch | Yes | Usually no |
| Deadbolt | Yes | Yes |
| Operated by handle | Yes | No |
| Key locking | Yes | Yes |
| Typical use | Internal/external doors | External and security applications |
| Main benefit | Latching and locking in one case | Simple deadbolt security |
A sash lock is particularly useful when you want a door to latch shut during normal use while still providing a key-operated locking function. A deadlock is more straightforward and focuses primarily on securing the door with a deadbolt.
Which Should You Choose?
The right option depends on the purpose of the door. For an internal door that needs to close with a handle and also lock securely, a sash lock is often the more practical choice. For an entrance where a separate latch or multipoint locking system is already provided, a deadlock may be more appropriate.
When comparing door locks, don't just consider the lock type. Check the backset, case size, door thickness, security rating and compatibility with your door handles and existing hardware.
Understanding what a sash lock is and the difference between a sash lock and deadlock makes it easier to specify suitable door hardware and avoid compatibility problems during installation.
Conclusion
When deciding between a deadlock and a sash lock for your front door, consider your security needs, convenience, and the type of door you are securing. Both types of locks offer distinct advantages, and the best choice depends on your specific requirements. By understanding the differences and evaluating your needs, you can ensure that your front door provides the right level of security and ease of use for your home.
For more information about our interior or exterior doors or door accessories, give us a call at 01603 622261 and speak to a member of our expert team today or Email us at sales@doorsuppliesonline.co.uk. We look forward to hearing from you.