Choosing and Installing Locks in Interior Doors

Choosing and Installing Locks in Interior Doors

Locking devices are an integral part of any residential or commercial space, providing security and confidentiality. In this article, we will explore the key aspects of choosing and installing locks, considering their types and installation methods, and provide recommendations for DIY installation of locks in interior doors.

Choosing a Lock: Key Factors

When selecting a lock for a door, the primary consideration is the door's functional purpose. This could be an entrance door requiring enhanced security, or an interior door where convenience and aesthetics are prioritized. Budget also plays a crucial role: high-quality locks offer better protection but are more expensive. Besides functionality, the design of the door and the interior of the space must be considered to ensure the lock harmonizes with the overall aesthetic. This is especially relevant for designer and exclusive interior solutions. Various styles of locks, from classic to modern, allow for an optimal choice that meets both technical requirements and aesthetic preferences. It is also important to consider the type of locking mechanism, which should correspond to the door's specifics and usage frequency.

Classification of Locking Mechanisms

Locking mechanisms are divided into surface-mounted (padlocks/rim locks) and mortise locks. Today, mortise locks are the most popular due to their reliability and aesthetics. They can be installed either during the door manufacturing stage or during installation.

Lock Installation: Professionalism vs. DIY

Installing locks in metal doors is best left to professionals. However, replacing a lock in wooden doors can be done independently.

Step-by-Step Guide to Installing a Lock in Interior Doors

Before starting the installation of a lock in interior doors, it is essential to prepare thoroughly and follow clear instructions. Here is a step-by-step guide to assist you in this process:

  1. Preparation: The first step involves determining the optimal distance of the lock from the floor, usually around 1 meter. It's important to carefully mark this spot on the door for convenient and ergonomic placement of the lock.
  2. Drilling Holes: After marking, proceed to drill holes. Use a drill bit that matches the size of the lock's body. Also, drill a hole for the latch, considering its size and depth. Be careful not to damage the door's structure while drilling.
  3. Installing the Lock: Once the holes are ready, carefully insert the lock body into its designated place. Ensure that the lock fits snugly and correctly, then secure it with screws or other fastening elements.
  4. Installing the Strike Plate: The final step is installing the strike plate on the door frame. To precisely determine its location, you can use a sheet of paper: press it against the door frame and close the door, leaving marks from the latch. Then, based on these marks, position the strike plate and screw it into place.

After completing the lock installation, it is crucial to check its functionality: the lock should easily lock and unlock. This ensures that all steps have been performed correctly, and the lock will provide reliable protection for your space.

Tips and Recommendations

When installing a lock yourself, approach the process with caution and preparation. Start by practicing on an old door to avoid mistakes during the final installation. This allows you to gain experience and confidence in your actions. Use only high-quality tools and materials, such as sturdy drills, reliable screws, and durable locks. Remember that the quality of the tools and components directly affects the security and longevity of your lock. The right choice of tools not only eases the installation process but also ensures that the lock will serve you reliably for a long time.


DIY lock installation is a process that requires attention and accuracy, but it is entirely feasible with the right tools and skills. The correct choice and installation of a lock significantly enhance the security level of your home or office.