How To Install a Deadbolt Lock

Installing a deadbolt lock is a simple DIY project that can significantly improve the safety of your entryways without breaking the bank. With the right tools and a bit of patience, you can add an extra layer of protection to your doors in just a few hours.

In the video above, This Old House general contractor Tom Silva shows us how to install a deadbolt on a door.

Understanding Deadbolt Locks

Deadbolt locks offer superior protection compared to standard spring bolt locks. These locks extend a solid metal bolt into the door frame, making it much more difficult for intruders to force the door open.

Types of Deadbolt Locks

There are several types of deadbolt locks available, each with its own set of features and benefits:

• Double-cylinder deadbolts: These locks require a key on both sides, offering increased security but potentially posing a safety risk in emergencies.
• Keyless deadbolts: These use electronic keypads or smart technology for access.
• Single-cylinder deadbolts: These locks require a key on the outside and have a thumb turn on the inside.

Preparing for Deadbolt Installation

Before you begin the installation process, you’ll need to gather the necessary tools and materials. Proper preparation will ensure a smooth and efficient installation.

Tools and Materials Needed

To install a deadbolt, you’ll need the following:

• Deadbolt lock kit
• Chisel
• Clamps
• Drill or impact driver
• Hammer
• Hole saw
• Pencil
• Spade bits
• Speed square
• Tape measure
• Utility knife

Choosing the Right Deadbolt

When selecting a deadbolt, consider factors such as:

• Brand reputation: Trusted brands like Kwikset, Schlage, Yale, and Baldwin often offer better durability and warranties.
• Finish: Choose a finish that complements your door hardware.
• Grade rating: Look for ANSI Grade 1, which is the highest security.
• Smart features: Decide if you want a traditional deadbolt or one with smart features, such as the ability to unlock with your smartphone.

Step-By-Step Deadbolt Installation Process

Installing a deadbolt requires precision and attention to detail. Follow these steps carefully to ensure a proper fit and function.

Marking the Door

1. Position the paper template provided with the deadbolt kit on the door edge.
2. Mark the center holes on both the face and edge of the door.
3. Use a speed square to ensure your markings are level and aligned.
4. Double-check measurements to avoid mistakes.

Drilling the Holes

1. Use a hole saw to drill the face hole, working from both sides to prevent splintering.
2. Drill the edge hole with a spade bit.
3. Insert the deadbolt into the edge hole and mark its outline.
4. Ensure the holes are clean and free of splinters.

Installing the Deadbolt Mechanism

1. Chisel out a mortise for the deadbolt plate using the outline you marked.
2. Screw the deadbolt into the edge of the door.
3. Install the exterior cylinder and interior thumb turn, ensuring they’re aligned properly.
4. Verify the smooth operation of the thumb turn and key.

Preparing the Door Jamb

1. Close the door and mark the end of the deadbolt on the jamb with a felt-tip pen.
2. Use the strike plate as a template to mark the deadbolt hole on the doorjamb.
3. Drill the deadbolt hole in the jamb with a spade bit.
4. Clean out the drilled hole to ensure a smooth fit for the bolt.

Installing the Strike Plate

1. Use a utility knife to mark the mortise outline for the strike plate.
2. Chisel out the strike plate mortise.
3. Set the strike plate in the jamb mortise and secure it with long screws for added strength.
4. Ensure the strike plate is firmly set and aligned with the deadbolt.

Deadbolt Testing and Troubleshooting

After installation, test the deadbolt to ensure it functions properly. To test the deadbolt, close the door and engage the deadbolt. Ensure the bolt extends fully into the strike plate and test the lock from both sides of the door.

We also recommend listening carefully for any unusual sounds during the test.

Common Issues and Solutions

If you encounter problems, consider these troubleshooting tips:

• Key difficulty: Check for obstructions in the keyway and re-align if necessary.
• Loose hardware: Tighten all screws and ensure that you’ve seated the lock correctly.
• Misalignment: Adjust the strike plate position or file the bolt hole for a better fit.
• Sticking lock: Lubricate the mechanism with graphite powder.

Enhancing Deadbolt Security

While a deadbolt significantly improves door security, there are additional steps you can take to maximize its effectiveness.

Reinforcing the Door Frame

• Add a door reinforcement plate to strengthen the area around the lock.
• Consider a door jamb armor kit for comprehensive protection.
• Install a reinforced strike plate with 3-inch screws.
• Secure door hinges with longer screws to prevent forced entry.

Additional Security Measures

• Consider adding smart home integration for remote monitoring and control.
• Install a door viewer or peephole for added visibility.
• Install motion-sensor lighting around entry points to deter intruders.
• Use a door chain or security bar in conjunction with the deadbolt.

Maintenance and Care for Deadbolt Locks

Regular maintenance will ensure your deadbolt continues to function properly and provide optimal security.

Routine Checks

• Check for alignment issues and correct them promptly.
• Clean the keyway and internal components to prevent debris buildup.
• Inspect the lock mechanism every six months for signs of wear or damage.
• Tighten any loose screws in the lock assembly and strike plate.

Lubrication

• Apply a graphite-based lubricant annually to keep the lock mechanism smooth.
• Apply lubrication sparingly to prevent clogging.
• Avoid using oil-based products, as they can attract dust and grime.

Deadbolt Cost Considerations

The cost of installing a deadbolt can vary depending on whether you choose to do it yourself or hire a professional. The cost of installing a deadbolt can cost between $40 and $200, according to Angi.

Investing in high-quality deadbolts and reinforcement kits may incur higher initial costs but provide better long-term security and durability. Weigh the benefits against your budget for the project to help choose the best product for your home.

What Tools Do I Need To Install a Deadbolt?