Deadlock FAQs
A deadlock is a type of lock that can only be operated with a key, both from the inside and outside. It does not have a spring mechanism, which makes it more secure against forced entry.
A deadlock uses a key to move a bolt into place, securing the door. Since it requires a key to lock and unlock from both sides, it provides enhanced security by preventing unauthorised access.
Deadlocks can be installed on most types of doors, including wooden, metal, and composite doors. However, the suitability may depend on the specific design and structure of the door.
While it's possible to install a deadlock yourself, it is recommended to hire a professional locksmith to ensure proper installation and optimal security.
While deadlocks are commonly used on external doors for security, they can also be used on internal doors where additional security is needed, such as in office settings or storage rooms.
55,000+ Happy Customers & 1,050+ Reviews
Join thousands of UK homeowners who rate us “Excellent” on Trustpilot.
30-Day Money-Back Guarantee
Changed your mind? Return unused doors within 30 days for a refund.
Made to Order Available
Many doors can be made to your exact measurements and finished by our in‑house team.
Expert Help, 5 Days a Week
UK-based door specialists on the phone to help you choose the right door and size.
Fast, Fully Insured Delivery
Quick delivery across mainland UK, fully covered against transit damage.
Professional Fitting Available
Ask our team to arrange trusted local fitters for seamless installation.




























