Door handles are not only functional hardware for operating locks; they also influence the appearance, ergonomics, and security of the door system. Among the most common options available are inline handles and offset uPVC door handles.
While they may look similar at first glance, these two handle types are designed with distinct configurations that serve different purposes. Choosing the wrong handle can result in poor functionality, compromised security, or even the inability to operate your lock system correctly. This article explains the key differences between inline and offset uPVC doors, their applications, advantages, and how to select the right option for your door.
Understanding uPVC Door Handles
uPVC (unplasticised polyvinyl chloride) is a durable, low-maintenance material widely used for windows and doors. uPVC doors are popular for their weather resistance, insulation, and security features. To operate multipoint locking systems fitted within these doors, specific types of lever handles are required.
Most uPVC door handles are lever/lever handles, meaning there is a lever on both the inside and outside of the door. However, the arrangement of the lever in relation to the keyhole or cylinder lock differs, leading to the distinction between inline and offset designs.
What is an Inline uPVC Door Handle?
An inline uPVC door (sometimes called a straight handle) is designed so that both levers are positioned in a straight line with each other. In other words, when you look at the door handle from the side, the external and internal levers are aligned directly over the same axis.
This symmetry makes inline handles easy to identify. They are not handed, meaning they can be used on either left- or right-opening doors without modification.
Key Characteristics of Inline Handles:
Alignment: Both handles are in line with each other, on the same vertical plane.
Non-handed: They can be fitted to any door orientation.
Versatility: Suitable for doors with standard multipoint locking mechanisms.
Common Use: Often found in residential front and back doors where straightforward locking systems are fitted.
Advantages of Inline Handles:
Ease of Replacement – Because they are not handed, inline handles are simple to swap out without worrying about door orientation.
Universal Fit – A practical choice for most standard uPVC doors.
Balanced Aesthetic – Their symmetrical design creates a clean, modern look.
When to Choose Inline Handles:
Inline handles are ideal if your door uses a lock where the spindle hole (for the handle bar) and keyhole (or cylinder) are aligned on the same axis. They are also the go-to option if you are unsure about handing or want a universal solution.
What is an Offset uPVC Door Handle?
An offset uPVC handle differs from the inline design in that the two levers are not directly aligned with each other. Instead, one lever is positioned slightly higher or lower than the other in relation to the lock mechanism.
This offset is required because some multipoint locking systems use dual spindles rather than a single one. These locks separate the functions of the inside and outside handles to provide added security or to allow independent control.
Key Characteristics of Offset Handles:
Two Spindles: Typically used with dual-spindle lock mechanisms.
Non-symmetrical: The inside and outside levers sit at different heights relative to the keyhole.
Handed Design: Offset handles may need to match the handing (left or right) of your door.
Advantages of Offset Handles:
Enhanced Security – Dual-spindle systems can prevent burglars from forcing entry by manipulating the external handle.
Specialized Functionality – Often used in more advanced multipoint lock systems for additional control.
Variety of Applications – Suitable for modern security-conscious installations, including composite and high-spec uPVC doors.
When to Choose Offset Handles:
Offset handles are necessary if your door lock uses a dual spindle arrangement. For example, some systems allow the internal handle to operate the latch and lock independently, while the external handle may require a key before engaging the mechanism.
Inline vs Offset: Key Differences at a Glance
Feature | Inline uPVC Handle | Offset uPVC Handle |
Lever Alignment | Both levers aligned in a straight line | Levers sit at different heights (offset) |
Spindle System | Single spindle mechanism | Dual spindle mechanism |
Handing | Non-handed; universal fit | Often handed; must match door orientation |
Common Use | Standard residential doors | Advanced or dual-function lock systems |
Ease of Replacement | Very straightforward | More complex; requires matching lock type |
Security Level | Standard | Higher, depending on lock system |
Choosing the Right Handle for Your Door
Selecting the correct uPVC window handle is not just about aesthetics—it is about compatibility and security. Here are some steps to help you decide:
Check the Lock Type:
Look at your multipoint lock system. If it has one spindle hole, an inline handle is usually correct. If there are two spindles, you will need an offset handle.
Measure PZ Centres (Keyhole to Spindle):
The “PZ measurement” is the distance from the center of the spindle hole to the center of the keyhole. Inline handles typically have identical PZ measurements on both sides, while offset handles have two different PZ measurements.
Consider Handing:
Inline handles are non-handed, but offset handles may need to be left- or right-handed depending on your door orientation. Double-check before purchasing.
Match Backplate Dimensions:
Ensure the backplate size of the replacement handle matches your existing one, so it covers any old screw holes or marks.
Think About Finish and Style:
Beyond function, you may want to choose a finish (chrome, brass, white, black, etc.) that complements your door and overall property style.
Common Mistakes to Avoid
Assuming all handles are universal: Inline handles are versatile, but offset handles must match the lock and handing.
Ignoring measurements: The wrong PZ size or screw hole spacing can make the handle unusable.
Overlooking security: Some homeowners downgrade to a simpler inline handle when their door requires an offset, unintentionally compromising the lock’s functionality.
Conclusion
The difference between inline and offset uPVC door handles lies primarily in the alignment of the levers and the type of lock mechanism they are designed to operate. Inline handles are aligned, non-handed, and suitable for single-spindle systems—making them a universal choice for standard doors. Offset handles, on the other hand, are designed for dual-spindle systems, offering enhanced security and functionality but requiring careful consideration of measurements and handing.
