Mortise Lock Installation and Repair: A Comprehensive Guide

28-03-2022 -

Are you considering installing a new Mortise lock, repairing an existing one, or simply rekeying it? Looking for a reliable commercial locksmith to do the job?

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What is a Mortise Lock?

A mortise lock is a type of lock that is installed inside a pocket, or mortise, that is cut into the edge of the door. This makes the lock sturdier and more secure than surface-mounted locks, such as cylindrical locks. Mortise locks are known for their robustness and are commonly used in commercial buildings, hotels, and high-end residential properties.

Unlike standard locks, mortise locks consist of several components, including:

• The Lock Body: This is the main mechanism installed inside the door.
• The Handle: Operates the latch to open or close the door.
• The Key Cylinder: Where the key is inserted to lock or unlock the door.
• The Strike Plate: Installed on the door frame to reinforce the area where the lock engages.

These locks offer a higher level of security due to their complex structure and the need for precise installation.

Advantages of Using Mortise Locks in Businesses

Mortise locks are often the go-to choice for businesses, and here’s why:

• Enhanced Security: Mortise locks are built into the door, making them more resistant to tampering and forced entry. Their solid construction and deep installation provide superior protection compared to other types of locks.
• Durability: These locks are designed to withstand heavy use and are often made from high-quality materials like brass or stainless steel. This makes them ideal for high-traffic areas such as office buildings, hotels, and storefronts.
• Customizable Design: Mortise locks come in various styles and finishes, allowing you to choose a design that complements your business's aesthetics while maintaining high security.
• Longevity: With proper maintenance, mortise locks can last for decades, providing long-term security and reducing the need for frequent replacements.

Mortise Lock Installation

Pre-Installation Considerations

Before installing a mortise lock, there are a few factors to consider to ensure the lock meets your security needs and is installed correctly:

• Door Compatibility: Not all doors are suitable for mortise locks. The door must be thick enough (usually at least 1 3/4 inches) to accommodate the lock body. Additionally, the material of the door should be sturdy enough to hold the lock securely.
• Security Needs: Determine the level of security required for the door. Mortise locks come in various grades, with Grade 1 providing the highest level of security. For commercial properties, a Grade 1 lock is often recommended for main entrances or areas that require high security.
• Measurements and Preparation: Accurate measurements are crucial for mortise lock installation. The mortise pocket must be precisely cut to fit the lock body, and the lock must be aligned correctly with the door’s edge to ensure smooth operation.

Step-by-Step Installation Process

Installing a mortise lock requires attention to detail and the right tools. Here’s a general overview of the installation process:

• Gather Your Tools: You’ll need a chisel, hammer, drill, mortise jig (for precise cuts), screwdriver, and the mortise lock kit.
• Mark the Door: Use the template provided with your lock kit to mark where the mortise pocket will be cut. This includes marking the outline of the lock body on the edge of the door and the locations for the key cylinder and handle on the face of the door.
• Cut the Mortise: Carefully chisel out the marked area on the door’s edge to create a pocket deep enough to accommodate the lock body. This step requires precision to avoid damaging the door or creating an uneven pocket.
• Drill Holes for the Cylinder and Handle: Drill holes in the face of the door for the key cylinder and handle, making sure they align perfectly with the lock body inside the mortise.
• Install the Lock Body: Insert the lock body into the mortise pocket and secure it with screws. Make sure the lock is flush with the door’s edge and operates smoothly.
• Attach the Handle and Cylinder: Fit the handle and key cylinder into the drilled holes and connect them to the lock body. Secure these components with screws, ensuring they function correctly.
• Install the Strike Plate: The strike plate reinforces the door frame where the lock bolt engages. Mark the location on the frame, chisel out a shallow recess, and screw the strike plate into place.
• Test the Lock: Make sure the key turns smoothly, the handle operates correctly, and the door locks securely. Adjust the strike plate or lock body if needed to ensure proper alignment.

Professional Installation vs. DIY

While some handy business owners might consider installing a mortise lock themselves, hiring a professional locksmith is often the better option. Here’s why:

• Expertise: A professional locksmith has the experience and tools needed to install a mortise lock accurately and efficiently, reducing the risk of mistakes that could compromise security.
• Time-Saving: Mortise lock installation is a precise task that can take several hours, especially if you’re not familiar with the process. A professional can complete the job quickly and correctly.
• Long-Term Security: Proper installation ensures the lock will function smoothly and securely for years to come, providing peace of mind for your business.

Mortise Lock Repair

Common Issues with Mortise Locks

Despite their durability, mortise locks can encounter problems over time, especially in high-traffic areas. Here are some common issues:

• Misalignment: The lock may become misaligned with the strike plate over time, making it difficult to lock or unlock the door. This can happen due to door sagging or changes in the building’s structure.
• Key Problems: If the key becomes difficult to turn or gets stuck, it could be due to wear and tear on the lock cylinder or the accumulation of dirt and debris inside the lock.
• Lock Jamming: Internal components can wear out or break, causing the lock to jam. This can be particularly problematic if the lock jams while the door is secured.

DIY Repair Tips

For minor issues, you might be able to fix the problem yourself:

• Lubrication: If the key is sticking or the lock is difficult to turn, try lubricating the lock with graphite powder or a silicone-based lubricant. Avoid using oil-based lubricants as they can attract dirt.
• Realign the Strike Plate: If the lock bolt doesn’t align with the strike plate, loosen the screws on the plate and adjust its position slightly. This can often solve issues with the lock not engaging properly.
• Check for Loose Screws: Over time, screws can loosen, causing the lock to shift out of alignment. Tighten any loose screws to restore the lock’s function.

When to Call a Professional Locksmith

While DIY fixes can work for minor issues, some problems require professional attention:

• Internal Damage: If the lock is damaged internally, it may need to be disassembled and repaired or replaced. This is a job best left to a professional locksmith.
• Broken Key Extraction: If a key breaks off inside the lock, it’s essential to call a locksmith to extract it without damaging the lock.
• Security Concerns: If your business has experienced a break-in or attempted forced entry, a locksmith can assess the damage and repair or replace the lock to restore security.

Rekeying a Mortise Lock

What is Rekeying and When is it Necessary?

Rekeying involves changing the internal pins and springs in the lock cylinder so that a new key is required to operate the lock. This is often done for security reasons, such as after employee turnover, losing a key, or moving into a new office space.

Benefits of Rekeying

• Cost-Effective Security: Rekeying is usually less expensive than replacing the entire lock, making it a budget-friendly way to enhance security.
• Key Management: If your business has multiple locks, a locksmith can rekey them to use the same key, simplifying access control.
• Maintaining Existing Hardware: Rekeying allows you to keep your existing locks while updating the security, preserving the aesthetic and functionality of your doors.

Professional Rekeying Services

While some mortise locks can be rekeyed with a DIY kit, professional rekeying ensures that the lock operates smoothly and securely after the process. Here’s why you should consider hiring a locksmith:

• Expertise: A locksmith can rekey the lock quickly and correctly, ensuring that all pins and springs are properly aligned.
• Security Assurance: After rekeying, a locksmith will test the lock to ensure it functions correctly and that the new key works smoothly.
• Assessment of Lock Condition: During the rekeying process, a locksmith can inspect the lock for any signs of wear or damage that might require repair or replacement.

Choosing the Right Mortise Lock for Your Business

Factors to Consider

When selecting a mortise lock for your business, consider the following:

• Security Grade: Mortise locks are rated by the ANSI (American National Standards Institute) on a scale from Grade 1 (highest security) to Grade 3 (basic security). For commercial properties, a Grade 1 lock is recommended for areas requiring maximum security.
• Door Compatibility: Ensure the lock is compatible with your door’s thickness and material. Heavy-duty doors may require a more robust lock, while standard doors can use a less heavy-duty model.
• Design and Finish: Choose a lock that complements your business’s aesthetic. Mortise locks come in various finishes, including brass, chrome, and stainless steel, allowing you to match them with your door hardware.

Top Mortise Lock Brands for Commercial Use

Some trusted brands that offer reliable and high-security mortise locks include:

• Schlage: Known for their durability and wide range of designs, Schlage mortise locks are a popular choice for businesses.
• Yale: Yale offers a variety of commercial-grade mortise locks that combine security with sleek design.
• ASSA ABLOY: This brand provides high-security mortise locks that are often used in institutional settings, offering advanced security features.

Mortise Lock Service Cost

Mortise lock services vary in cost depending on the type of service needed—installation, repair, or rekeying. Installation typically costs between $150 and $400, depending on the complexity of the job and the quality of the lock. Repairs usually range from $80 to $200, depending on the issue. Rekeying a mortise lock, which is often more affordable than replacing the lock, costs between $50 and $100. Below is a table outlining these costs:

Conclusion

Mortise locks are an excellent choice for securing your business, offering enhanced security, durability, and versatility. Whether you need to install a new lock, repair an existing one, or rekey your locks for added security, it’s crucial to understand the process and consider the benefits of professional locksmith services. By investing in the right mortise lock and ensuring it’s properly installed and maintained, you can protect your business, employees, and assets. If you’re ever in doubt, don’t hesitate to consult a professional locksmith—they’re there to help you keep your business secure and running smoothly.

Reference

1. Types of Mortise locks
2. Mortise lock installation.

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