Traditional and Double Glazed Locks

When it comes to securing your home, the type of lock you choose is crucial. With various options available, it’s essential to understand the differences between traditional locks and those used in double glazing. At RJ Parker Locksmiths, we aim to provide you with the knowledge needed to make informed decisions about your home security. In this blog, we’ll explore the key differences between traditional locks and double glazing locks, highlighting their unique features, advantages, and suitability for different types of doors and windows.

1. Overview of Traditional Locks

Traditional locks have been used for centuries to secure doors and windows. They come in various types, each with its specific mechanism and level of security. Here are some common types of traditional locks:

Mortice Locks

Mortice locks are fitted into a pocket within the door itself. They are commonly found on wooden doors and provide a high level of security due to their robust design and deep-set installation.


  • High security
  • Durable and reliable
  • Suitable for external doors

Cylinder Locks

Cylinder locks, also known as pin tumbler locks, are widely used in residential properties. They consist of a cylindrical mechanism that operates with a key, and they can be easily replaced if needed.


  • Easy to install and replace
  • Available in various security grades
  • Versatile for different door types


Deadbolts are a popular choice for enhancing door security. They are operated by a key or thumb turn and provide additional reinforcement to standard locks.


  • High resistance to forced entry
  • Simple to operate
  • Can be used in conjunction with other locks

2. Introduction to Double Glazing Locks

Double glazing locks are specifically designed for use with double glazed windows and doors. These locks cater to the unique structure and material of double glazing, providing enhanced security features suited to modern homes.

Espagnolette Locks

Espagnolette locks are commonly used in double glazed windows. They feature a locking mechanism that operates by turning a handle, engaging multiple locking points along the window frame.


  • Multi-point locking for increased security
  • Smooth and easy operation
  • Suitable for both windows and patio doors

Shoot Bolt Locks

Shoot bolt locks are another popular choice for double glazed windows and doors.

These locks use bolts that shoot into the frame, securing the window or door at multiple points.


  • Strong and secure locking mechanism
  • Ideal for larger windows and doors
  • Enhanced resistance to forced entry

Tilt and Turn Locks

Tilt and turn locks are designed for tilt and turn windows commonly used in double glazing. These locks allow the window to tilt inwards for ventilation or fully open for cleaning and emergency egress.


  • Versatile locking positions
  • Provides both security and ventilation
  • Easy to use and maintain

3. Key Differences Between Traditional Locks and Double Glazing Locks

Understanding the differences between traditional locks and double glazing locks can help you choose the best security solution for your home. Here are the main distinctions:

Design and Installation

Traditional locks are generally designed for solid wooden or metal doors, requiring different installation techniques compared to double glazing locks. Double glazing locks are specifically engineered for the unique frame structures of uPVC, aluminium, and composite doors and windows.

Traditional Locks:

  • Typically installed on solid doors
  • May require more invasive installation

Double Glazing Locks:

Designed for uPVC, aluminium, and composite framesIntegrated into the window or door frame during manufacturing

Security Features

Double glazing locks often provide higher security levels due to their multi-point locking systems, which distribute the locking force across multiple points along the frame. Traditional locks, while robust, usually offer single-point locking.

Traditional Locks:

  • Single-point locking (e.g., deadbolts)
  • High durability and resistance

Double Glazing Locks:

  • Multi-point locking for enhanced security
  • Increased resistance to forced entry
  • Operation and Convenience

The operation of double glazing locks is generally more straightforward and integrated with the design of modern windows and doors. Traditional locks might require separate mechanisms and keys for different parts of the door.

Traditional Locks:

  • Separate keys and mechanisms for each lock
  • Manual operation, requiring more effort

Double Glazing Locks:

  • Integrated handles and locking systems
  • Smooth and effortless operation

4. Choosing the Right Lock for Your Home

Selecting the right lock depends on various factors, including the type of door or window, the level of security required, and personal preferences. Here are some tips to help you make the right choice:

For Traditional Doors:

  • Consider high-security mortice locks for external wooden doors.
  • Use cylinder locks for internal doors and less critical access points.
  • Enhance security with deadbolts on primary entry points.

For Double Glazed Doors and Windows:

  • Opt for espagnolette locks or shoot bolt locks for enhanced security.
  • Use tilt and turn locks for windows that require ventilation options.
  • Ensure the locks are installed correctly by a professional locksmith.


Understanding the differences between traditional locks and double glazing locks is essential for ensuring your home’s security. Each type of lock has its unique features and benefits, catering to different door and window structures. At RJ Parker Locksmiths, we offer a comprehensive range of both traditional and double glazing locks, tailored to meet your specific needs.

Whether you’re looking to upgrade your existing locks or need advice on securing your new double glazed windows and doors, our team of experts is here to help.

Contact RJ Parker Locksmiths today for a consultation and let us help you enhance your home security with the right locking solutions.