How to Lock Patio Door from Outside

Securing a patio door from the outside is vital in enhancing home security and ensuring peace of mind. Patio doors are often seen as vulnerable entry points, making it crucial to implement effective locking mechanisms. There are several reasons why homeowners might need to lock a patio door from the outside, including preventing break-ins, ensuring the safety of children and pets, and allowing convenient outdoor access for family members.

This guide provides a comprehensive overview of how to lock patio door from outside using different approaches. Whether it’s utilizing built-in locking systems, exploring aftermarket solutions, or employing DIY methods, there’s a solution to fit every home’s needs. By understanding the available options, homeowners can make informed decisions to secure their property effectively while maintaining their daily routines’ ease of use and functionality.

Understanding Different Types of Patio Doors

Patio doors come in various styles, each with unique mechanisms for locking and securing them from the outside. Understanding the type of patio door you have is the first step in determining the best method for locking it effectively. Below, we outline three common types of patio doors and their typical locking features:

Sliding Glass Patio Doors 

Sliding glass patio doors are among the most popular options due to their space-saving design and modern aesthetics. These doors typically have a latch installed on the inside, but they may not include a built-in exterior lock. To enhance outdoor security, homeowners can install an aftermarket lock designed for sliding doors or use a keyed bar lock system for added protection.

French Patio Doors 

French patio doors consist of two hinged doors that open outward or inward from the center. They are equipped with a central locking mechanism, which often includes a multi-point lock to secure the doors properly. An external key lock is usually required to lock them from the outside. This solution provides convenience and improved security, making them suitable for entryways that need outside access.

Folding or Bi-Fold Patio Doors 

Folding or bi-fold patio doors are made of multiple connected panels that fold and stack to the side when opened. Modern models often include built-in locking mechanisms, sometimes extending to key locks for exterior use. For added protection, third-party locking solutions can be integrated without compromising the door’s functionality or sleek design.

By identifying the specific type of patio door in your home, you can select an appropriate locking method to maximize both safety and convenience.

How to Lock Patio Door from Outside: Using Built-In Exterior Locks

Step 1: Checking for an Existing Exterior Lock 

Some patio doors have built-in exterior key locks, offering a convenient and integrated security option. Begin by inspecting the lock mechanism for proper functionality. Test the lock by using the key to ensure it turns smoothly, engaging or disengaging the lock without resistance. Look out for visible wear, rust, or any signs of damage that might compromise its effectiveness. Regular maintenance, such as cleaning and lubricating the lock, can also extend its longevity. 

Step 2: Replacing or Rekeying the Lock 

If the built-in lock shows signs of damage or is no longer secure, consider replacing the lock cylinder or rekeying it. Replacing the cylinder is a straightforward option, and many hardware stores offer compatible replacements for common patio door models. Rekeying the lock is another cost-effective alternative, allowing you to modify the lock to work with a new key while maintaining the existing hardware. Both solutions enhance the security of your patio door without requiring a full door replacement. For best results, consult a locksmith to ensure the new or rekeyed lock aligns with safety standards and operates reliably.

How to Lock Patio Door from Outside: Installing Aftermarket Keyed Locks 

Upgrading your patio door security by installing aftermarket keyed locks is an excellent way to enhance protection against unauthorized access. Below are steps for adding locks to different types of patio doors:

Step 1: Adding a Keyed Lock for Sliding Glass Doors 

For sliding glass doors, it’s recommended to install a mortise lock or a keyed hook bolt mechanism. These locks provide the ability to secure your door from the outside using a key. Begin by selecting a lock compatible with your door model. Follow the manufacturer’s installation instructions, which usually involve mounting the lock into the existing door frame. Ensure the lock aligns correctly with the door to allow smooth operation. Once installed, test the lock to confirm it securely fastens the sliding door.

Step 2: Installing a Double-Sided Deadbolt on French Doors 

To bolster security on French doors, consider installing a double-cylinder deadbolt. This type of lock requires a key to operate from both the interior and exterior, offering added protection. Begin by marking the position of the deadbolt on both doors. Use a power drill to create the necessary holes for the lock mechanism and mounting screws. Attach the deadbolt to the door, ensuring all components are securely fastened. Test the lock to make sure it functions properly before use.

Step 3: Using a Surface-Mounted Latch Lock 

A surface-mounted latch lock is another practical option for exterior access. This lock is typically mounted on the inside of the door and includes a keyed mechanism on the exterior. Position the latch where it can best secure the door when latched. Screw the lock into place, ensuring it fits snugly. After installation, confirm that the lock engages firmly and easily opens using the key. This solution is quick to install and provides additional safety for your patio door.

Using a Security Bar or Rod with External Access 

Step 1: Installing a Security Bar with an External Release Mechanism 

A security bar with an external release mechanism is a convenient and effective way to secure your door while maintaining external access. Some advanced models are designed to lock and unlock from the outside, providing enhanced flexibility and security. To install, begin by measuring the width of the door track to ensure proper fit. Attach the mounting brackets to the door frame according to the manufacturer’s instructions, typically using screws for a secure hold.

Place the bar into the brackets and adjust it to block the track when locked securely. Test the external release mechanism thoroughly to confirm smooth operation and ensure it locks and unlocks without issue. This option is particularly suitable for those seeking a balance between security and convenience. 

Step 2: DIY Wooden or Metal Rod for Sliding Doors 

You can use a custom-fit wooden or metal rod to secure sliding doors for a more budget-friendly alternative. Start by measuring the length of the door’s sliding track when in the closed position. Cut the rod to fit snugly within the track, ensuring it blocks the door from being forced open. Place the rod into the track when the door is shut, and remove it as needed. While this method enhances security, it’s less ideal for doors requiring frequent access, as the rod must be manually removed each time. However, this simple solution offers an extra layer of protection against unauthorized entry at a low cost.

Using Smart Locks for Patio Doors 

Smart locks offer a modern and highly convenient way to secure patio doors, combining advanced technology with ease of use. For traditional hinged patio doors, smart deadbolts are an excellent choice. These locks often feature electronic keypads or smartphone connectivity, allowing you to lock and unlock your doors with a code or a mobile app. Many models also integrate with smart home systems, enabling remote access and monitoring straight from your phone, making them ideal for frequent outdoor access. 

There are Wi-Fi or Bluetooth-enabled smart locks specifically designed for sliding patio doors for their unique functionality. These locks attach to the door’s interior and offer features such as remote locking, voice control integration, and activity tracking to ensure that your property is secure even from a distance. They are discreet yet highly effective, maintaining the aesthetics of your sliding doors while adding a layer of advanced security. 

Smart locks are perfect for busy households or individuals who prefer a seamless and automated locking mechanism. With numerous options available, such as locks with fingerprint recognition or temporary access codes for guests, smart locks provide unmatched flexibility and security, making them a top choice for modern patio door solutions. 

Alternative DIY Methods to Secure a Patio Door from Outside

Using a Portable Lockbox with a Spare Key 

A portable lockbox is a simple and convenient solution for securing your patio door from the outside. These small, durable boxes can be hidden near the patio area and provide access to a spare key when needed. Many lockboxes come with combination codes for added security, ensuring that only trusted individuals can access the key. This method is ideal for occasional outdoor locking without investing in high-tech solutions.

Attaching a Cable Lock 

A cable lock can be an effective and affordable DIY method to secure your patio door. The cable lock is typically looped through the door handles and secured with a padlock, thereby restricting movement and preventing intruders from opening the door. This option is excellent for temporary security and works well for both sliding and hinged patio doors.

Custom Latch with External Pull Cord 

You can install a custom latch system with an external pull cord for a more hands-on solution. This DIY method involves attaching a secure latch on the inside of the door and threading a cord through to the outside. The cord allows external locking and unlocking while keeping the main door mechanism intact. Though it offers basic security, this technique can be a practical stopgap solution for budget-conscious homeowners.

Common Mistakes to Avoid 

Relying on Weak or Old Locks 

One of the most frequent mistakes is relying on weak or outdated locks that can be easily broken or bypassed. Over time, locks can wear out, compromising their effectiveness. Always ensure that the locks you use are durable, up-to-date, and made from high-quality materials designed for outdoor use.

Forgetting to Check Building Codes 

Another significant mistake is neglecting to check local building codes or regulations before modifying your patio door locks. Some areas have specific guidelines or restrictions to ensure safety and adherence to building standards. Failing to comply could result in fines or needing to reverse the changes.

Ignoring Emergency Exit Access 

Installing a lock without considering emergency exit access can be dangerous. Any locking mechanism should still allow for a quick and safe exit in case of an emergency, such as a fire. Prioritize safety alongside security to ensure the well-being of all occupants.

Conclusion 

Understanding how to lock patio door from outside effectively is essential for maintaining security and peace of mind. Begin by selecting the right locking mechanism suited for your specific door type, such as keyed locks or exterior deadbolts, ensuring durability and reliability over time. For enhanced safety, consider adding complementary security measures like outdoor cameras, motion sensors, or alarm systems to deter potential intruders. By choosing high-quality locks, adhering to safety regulations, and integrating additional safeguards, you can protect your home while maintaining convenience and emergency access. A well-secured patio door is a key component of a safe and secure home.