Types of Sliding Glass Door Locks: Selection Guide, Types, Replacement Guide & More

When it is time to buy new sliding glass door locks, there are two things you should know. One is the type or brand of door lock that needs to be replaced. The other is the available lock features that you can upgrade to.

How to Choose The Right Glass Door Locks?

The three-point selection of patio door locks

1. As mentioned above, identify the brand or type of lock. On the upper body of the lock, see if the slotted hole is enclosed or open. To open a lock with an enclosed slotted hole, you only need to turn the keyway to a 45-degree angle.
2. Next, with the latch hook in the locked position, see if the keyway position is vertical, at an angle of 45 degrees, or at an angle of 22-1/2 degrees. The replacement lock's keyway should match that of the original lock.

3. Finally – and this is something you would have already noticed – check if the face of the latch is square or round at the top and bottom. Again, your replacement lock needs to be compatible with the shape and cut of the latch face.

Two additional points to remember

Though the hole dimensions of locks center-to-center mounting may look similar, but they differ. It is important to get the accurate measurement down so a new lock with the same dimensions can be chosen. If you ignore this aspect, it won't be possible to install a new lock with dissimilar dimensions.

You may also want to check if the patio door lock has an adjustable hook projection. The advantage of this feature is that it allows the hook to be easily adjusted by turning the slotted screw located above the lock face. This adjustment comes in handy when you want to create a tight door seal.

Some interesting patio door lock features

The CR Laurence sliding door hardware range is extensive. Anyone shopping for glass door locks can select from a variety of features and options. They include pre-attached mounting plates, Mortise locks for flush handle sets, round-end face automatic Mortise locks, and square-end face Mortise locks with adjustable hook projection.

Best sellers include the E2009 wide round end face plate Mortise lock for Adam Rite doors, and the E2198 1-3/8'' cylinder lock for Kwikset. The former has a ½'' wide steel housing with center-to-center screw holes. The latter has a breakaway tailpiece with a 45 degree swivel, and comes with two keys.

Types of Sliding Door Locks That You Must Know About!

There are many reasons to choose a sliding door. However, it is extremely important to choose the right sliding door lock to go with it! Whether it is to beef up your home’s security or you wish to replace an old mechanism, here’s a detailed look at the most common types available, along with what makes them ideal for different needs.

Mortise Locks

Mortise locks are recessed into the edge of the sliding door panel, which makes them a discreet and durable option. They’re commonly found in aluminium frame sliding doors and are often paired with flush handle sets that don’t stick out.

• Great for homeowners who prefer a clean, built-in look
• Compatible with both residential and commercial-grade doors
• Offers medium-to-high security depending on the internal locking mechanism

Keyed Locks

Keyed locks offer reliable security and are best for patio doors that lead to outdoor areas. These locks use a traditional key cylinder, either integrated into the handle set or as a standalone unit.

• A smart option for doors that require regular locking from outside
• Helps prevent unauthorized access to patios, balconies, or backyard decks
• Available in single-key and double-cylinder versions (with keys required from both sides)

Two-Bolt & Double-Bolt Locks

These entry door locks use two separate bolts, one at the top and one at the bottom, to secure the door firmly in place. Unlike standard center-mounted locks, double-bolt systems help prevent both horizontal sliding and vertical lifting.

• Ideal for homeowners concerned about forced entry or prying
• It is especially useful for ground-level and balcony doors in multi-story buildings
• Adds an extra layer of protection alongside the primary lock

Keyless & Electronic Sliding Door Locks

Keyless locks are designed for convenience and quick access, using mechanical dials or digital keypads instead of traditional keys. Some are battery-operated, while others use manual push-button combinations.

• Great for shared households, vacation rentals, or people prone to losing keys
• Offers quick re-coding options in case of security concerns
• Some models include auto-lock features for added safety

Smart Locks (Wi-Fi/Bluetooth Enabled)

Smart locks allow you to control your sliding door remotely via smartphone apps or home assistants like Alexa and Google Home. Most models also offer features like access logs, auto-lock timers, and guest access management.

• Best for tech-savvy homeowners or smart home users
• Allows remote locking/unlocking even when you’re not home
• Ensure your sliding door’s handle or latch system is compatible with smart retrofit kits

Child Safety Locks / Pet Locks

These are lightweight secondary locks meant to prevent accidental opening by toddlers or pets. Most are tool-free and rely on adhesive mounts or clamp-style mechanisms.

• Offers peace of mind without altering your existing lock system
• Best used on interior sliding doors or glass panels with easy access
• Easy to install, remove, and reposition

Security Bar or Rod-Style Locks

These are physical barriers placed on the track of a sliding door to prevent it from opening, even if the main lock is compromised. They are either adjustable rods, track clamps, or foot locks.

• Excellent low-cost, high-impact secondary lock
• Easy to use for nightly security or temporary use
• Popular among renters, elderly users, and patio door reinforcement

These are some of the many security solutions available at DK Hardware to keep your home safe and secure.

Things To Consider While Choosing a Sliding Door Lock For Your Home

Different sliding door locks come in different types, styles, and sizes. Choosing the wrong one can mean a poor fit, weak security, or frustrating daily use. Here are the key factors to help you make the right choice.

Understand Your Door Type

The material and build of your door play a big role in lock compatibility.

• Aluminum doors typically use mortise-style locks recessed into the frame.
• Vinyl or wooden sliding doors often require surface-mounted locks or handle-integrated options.
• Frameless glass patio doors may need patch locks or glass clamp locks without drilling.

Indoor vs Outdoor Use

Where the sliding door is installed matters:

• Interior sliding doors (like room dividers or closets) may only need simple latches or privacy locks.
• Exterior patio doors require robust, weather-resistant locks, often keyed or dual-bolt types, to protect against break-ins and weather elements.

Locking Mechanism Preferences

Consider how you want the lock to function.

• Hook-style mortise locks latch into the jamb and are ideal for most aluminum doors.
• Double-bolt locks secure the top and bottom, perfect for added security.
• Electronic locks offer code-based access or remote control for convenience.

Choose a mechanism that balances security and ease of use based on who’s using it (kids, elderly, etc.).

Security Concerns

If your main goal is securing a vulnerable entry point, look for:

• Anti-lift features to prevent the door from being pried open
• Multi-point locking systems
• Heavy-duty keyed or double-bolt locks with steel reinforcements

Also, consider adding a secondary lock or security bar for high-risk areas.

Key vs Keyless Options

Each has its pros and cons. Choose whether you need a keyed lock or a keyless option based on how frequently you lock/unlock and who needs access.

• Keyed locks are more traditional and secure for outdoor use
• Keyless mechanical locks are convenient, especially for interior doors
• Smart locks let you control access remotely, ideal for rental properties or smart homes

Aesthetic and Handle Compatibility

Some locks are built into the handle set, while others are standalone.

• Ensure your lock matches the handle style (flush vs surface-mounted)
• Consider finish options like chrome, black, or bronze to match your door hardware
• Frameless doors may need minimal, non-invasive locks for visual appeal

Common Mistakes to Avoid When Choosing a Sliding Door Lock

• Buying a lock without checking the mounting hole spacing
• Ignoring door thickness or frame type
• Choosing a residential lock for a commercial setting
• Not verifying if the door opens from the left or the right
• Prioritizing looks over actual security needs

Also Read: How to Choose Patio Door Locks For Your Home?

Sliding Glass Door Lock Replacement Guide

Over time, sliding glass door locks can become loose, misaligned, or simply wear out. Replacing them isn’t always complicated, but it does require precision. This guide walks you through everything you need to know before you replace a sliding glass door lock.

Tools Required

Before you begin, gather the basic tools you'll need for most sliding door lock replacements:

• Phillips and flathead screwdrivers
• Tape measure
• Pencil or marker
• Power drill (only if new holes are needed)
• Replacement lock (ideally identical or compatible with the original)
• Needle-nose pliers
• Safety gloves
• Vacuum or brush to clear debris from the door track

Step-by-Step Instructions

Remove the Old Lock

• Open the sliding door and locate the screws on the handle or lock face.
• Carefully unscrew and remove the locking mechanism. Keep all hardware aside.

Measure the Existing Lock Setup

• Measure the center-to-center hole spacing. This ensures the new lock aligns with the existing holes.
• Note the shape of the lock face (round or square) and the hook style.

Test Fit the New Lock

• Position the new lock to check the fitment before installing.
• Make sure the keyway and latch directions match your original lock.

Install and Secure the New Lock

• Align the lock and screw it into place without overtightening.
• If needed, adjust the latch hook to match the strike plate.

Test the Functionality

• Slide the door open and closed to ensure smooth operation.
• Lock and unlock to confirm alignment and security.

Adjusting the Hook Projection

Many modern locks come with adjustable hook projection, which helps you get a snug door seal.

• Look for a slotted adjustment screw on the lock face.
• Turning it slightly changes how far the hook reaches into the strike plate.
• This feature is especially helpful when replacing older locks or dealing with slight frame warps.

DIY vs Professional Help

Most basic replacements are manageable with common tools and attention to detail.

You may want to hire a professional if:

• Your sliding door is part of a multi-point locking system
• You're unsure about aligning latch mechanisms
• New holes or retrofits are required
• The glass door is heavy, and access is restricted

For straightforward lock swaps, confident DIYers can typically complete the job in under an hour.

Need Help Finding the Right Lock?

At DK Hardware, we stock a wide range of sliding door locks, replacement parts, and accessories, all from trusted manufacturers. Whether you're shopping by door type, feature, or brand compatibility, we make it easy to find exactly what you need.

Still have questions? Our experts are just a call away. Reach out anytime - we’re here to help you create your dream space.