Installing a door lock is a basic skill to have for your home security and privacy. Whether you’re replacing an old lock or adding a new one, this will walk you through the process of how to fit a door lock.
Door Locks
Before we get started, let’s talk about the types of door locks:
- Cylindrical Locks: These are the most common residential locks, you bore two holes perpendicular to each other in the door. Easy to install and suitable for most interior and exterior doors.
- Mortise Locks: Found in older homes, these locks require a pocket (mortise) to be cut into the door. More complicated to install but more secure.
- Deadbolt Locks: Used in conjunction with other locks, deadbolts add an extra layer of security. Single and double-cylinder available.
Tools and Materials Needed
To add a lock to a door, you’ll need:
- New door lock set
- Screwdriver (Phillips or flathead, depending on screws)
- Tape measure
- Pencil
- Chisel (if adjustments are needed)
- Drill with appropriate bits (if new holes are required)
Step-by-Step Guide to Installing a Door Lock
- Remove the Old Lock
- Unscrew the Door Knobs: Find and remove the screws on the interior knob. Pull both knobs away from the door.
- Remove the Latch Mechanism: Unscrew the latch plate on the door’s edge and slide out the latch.
- Take Off the Strike Plate: Unscrew and remove the strike plate from the door frame.
- Measure the Door
- Backset Measurement: Measure from the edge of the door to the center of the hole (usually 2⅜ inches or 2¾ inches). Make sure your new lock matches this measurement.
- Hole Diameter: Check that the existing hole will take the new lock. Standard sizes are 2⅛ inches for the face bore and 1 inch for the edge bore.
- Adjustments: If the latch plate of the new lock doesn’t fit flush with the door edge, use a chisel to adjust the mortise.
- Install the Latch
- Insert the Latch: Put the latch into the edge bore with the beveled side facing the door jamb.
- Secure the Latch Plate: Align the latch plate with the mortise and screw it in.
- Attach the Door Knobs or Levers
- Exterior Side: Insert the exterior knob or lever through the face bore, the spindle should pass through the latch mechanism.
- Interior Side: Align the interior knob or lever with the spindle and screw in.
- Install the Strike Plate
- Position the Strike Plate: Put it on the door frame and line it up with the latch.
- Mark and Chisel: If needed, mark the area and chisel a recess so the strike plate sits flat.
- Secure the Strike Plate: Screw it in.
- Test the Lock
- Functionality Check: Try the door handle and lock to see if it moves smoothly.
- Alignment: Close the door to make sure the latch lines up with the strike plate.
Tips
- Use Good Hardware: Invest in better locks for more security and longevity.
- Follow the Manufacturer’s Instructions: Always read the instructions that come with your lock set.
- Get Help if Needed: If you’re unsure about anything, call a locksmith.
Home Security
Beyond just a standard lock, consider:
- A Deadbolt: A deadbolt adds an extra layer of security.
- Reinforce the Door Frame: Strengthen the door frame to resist forced entry.
- Smart Locks: New smart locks have remote access and monitoring.
Conclusion
Fitting a door lock is a manageable task that significantly enhances your home’s security. By following this guide and taking necessary precautions, you can ensure a secure and functional door lock installation.
For a visual demonstration, you might find this video helpful:
