How to Replace a Deadbolt Lock on a Door

Key Takeaways

• Replace your deadbolt lock cylinder if it’s worn or isn’t functioning properly.
• All you’ll need to install your deadbolt is a Phillips screwdriver.
• How to replace deadbolt locks on doors: remove your old deadbolt, adjust the new deadbolt latch to your backset size, install the exterior and interior parts, and attach the front and back plates.
• Make sure to test your new deadbolt for smooth operation.

Deadbolts enhance your home’s safety and security. But, like many things in the home, they need to be replaced, whether due to regular wear and tear or because you want a modern upgrade. 

The good news? Replacing your deadbolt is easier than you think – and doesn’t require any complicated tools. Learn how to replace the deadbolt lock on your door with our guide at Door Locks Direct.

When It’s Time to Replace Your Deadbolt

• Your lock is experiencing wear and tear, such as rust or sticking mechanisms
• Your keys are lost or stolen
• You’re moving into a new home
• You’ve experienced a break-in
• You want an aesthetic upgrade with a new door hardware finish
• You want to replace older locks with a high-security deadbolt lock cylinder

You’re not just investing in door hardware when you’re replacing your deadbolt. You’re investing in your security and peace of mind. 

Before learning how to replace the deadbolt lock on your door, consider purchasing locks with BHMA Grade 1 or 2 certification for higher residential security. You may also want hardware that offers added security measures. For example, many Kwikset door locks are designed with SmartKey. This patented technology protects against lock picking, drilling, and bumping.

You’ll Need…

• Philips Head Screwdriver
• Deadbolt Kit
• Deadbolt Assembly – cylinder (key side) and thumb turn (interior side)
• Bolt/Latch Mechanism
• Strike Plate
• Mounting Hardware (screws for the strike plate and cylinder)
• Face plates
• Keys
• Tape Measure (Optional, to check the backset)

Note: We do not recommend using an electric drill for installation. It can easily strip your screws and damage your lock.

How Long Will Lock Installation Take?

Changing standard deadbolts typically takes about 10 to 15 minutes, even for beginners. This is because your door already has the correct-sized holes for the replacement, unlike a new installation, which requires measuring and drilling.

Your Step-By-Step Guide: How to Replace the Deadbolt Lock on Your Door

1. Remove Your Old Deadbolt

Use your screwdriver to remove the two screws on the interior thumb turn. This will allow you to pull the interior and exterior portions of the deadbolt off the door. Then remove the two screws from the latch faceplate which is on the edge of the door, and remove the deadbolt latch. Finally, remove the strike plate by removing the screws. This is the thin plate that makes contact with the door frame. 

Make sure everything is removed before proceeding: the interior and exterior cylinder pieces, deadbolt latch, strike plate, and screws.

2. Adjust the Deadbolt Latch to Your Backset Size & Install

Most modern deadbolts come with an adjustable latch that supports the two standard residential backset sizes – 2 ⅜” and 2 ¾” – for easy installation. Be sure to adjust your deadbolt to your door, then insert the new bolt in through the edge of the door with the “top” or “up” marking facing up. Secure it with the provided screws.

Unsure of your backset size? Use a ruler or measuring tape to double-check before you replace your deadbolt lock cylinder. 

Reminder: The backset is the distance from the edge of the door to the center of the large borehole where your deadbolt is installed.

3. Install the Exterior Cylinder

Align the exterior piece by pushing the metal rod (commonly called a spindle or torque blade) through the center of the latch. Make sure it fits flush with the door. Some low-profile deadbolts have two metal rods that go above and below the latch; be sure to consult the instruction pamphlet or QR code instructions.

4. Attach the Interior Part of the Deadbolt

Attach the interior part of the deadbolt lock by inserting the two provided bolts through the interior plate, through the deadbolt latch, and into the exterior side of the lock.

Tighten the screws with your hand, then fasten them with your screwdriver. Make sure the lock isn’t engaged during installation.

5. Install the New Strike Plate

Align the strike plate on your door jamb and install with the provided screws. You might need to adjust this after you have finished your installation to ensure the deadbolt can extend freely into the door jamb. Oversized, high-strength and adjustable strike plates are available if your previous strike plate was larger than standard.

6. Test Your New Deadbolt

You’ve learned how to replace the deadbolt lock on your door. Now, it’s time to check your work!

Test your lock with your keys and the thumb turn to ensure smooth operation. 

Rely on the Trusted Experts at Door Locks Direct

You can replace any deadbolt lock cylinder with our guide. However, we also suggest reading your lock manufacturer’s instructions to ensure installation is as smooth as your deadbolt’s operation. Have questions about how to replace a deadbolt lock on your door? Call to talk to an expert.

Need help installing electronic door locks? Check out our smart door lock installation guide.

FAQs

Can you install a deadbolt yourself?

Yes! Learning how to replace deadbolt locks on doors is pretty straightforward, requiring a Philips Head screwdriver and a few simple steps. It should take about 15 to 30 minutes for beginners or DIY-ers.

Is a strike plate really necessary for a deadbolt?

Strike plates are absolutely necessary when you replace a deadbolt lock cylinder. These plates help to:

• Prevent Damage - A strike plate stops the deadbolt from digging into the door frame and causing premature wear.
• Ensure Alignment - Your strike plate ensures the bolt extends fully and securely locks the door.
• Provide Forced Entry Defense - The metal plate and screws prevent forced entry attempts.

Are deadbolt holes standard?

Yes. Most deadbolts need a hole that’s 2 1/8 inches in diameter for the body of the lock to fit in the door. Some deadbolts will work with smaller bore holes too, so be sure to check the specifications. The bolt hole on the door edge is 1 inch. 

Backsets are also standard. They usually measure either 2 3/8 inches or 2 3/4 inches. However, you should always check the manufacturer’s specifications before you learn how to replace deadbolt locks on doors.