Complete Guide to Window Handles
Learn to identify, measure and fit window handles for uPVC, aluminium and timber windows. Expert UK guide covering espag, cockspur and tilt-turn handle types.
Key Takeaways
Learn to identify, measure and fit window handles for uPVC, aluminium and timber windows. Expert UK guide covering espag, cockspur and tilt-turn handle types.
In This Guide
Complete Guide to Window Handles (uPVC, Aluminium and Timber)
Choosing the right window handles is not just a finishing touch: it affects security, weather-tightness, ease of escape in an emergency, day-to-day comfort, and whether your window locks and seals properly. In UK homes and commercial buildings you will most commonly encounter uPVC casement windows with multi-point locks, but aluminium and timber systems use many of the same handle types, fixing patterns, and measurement standards. This definitive guide explains what window handles are called, the different types of window handles, how to identify your existing handle, how to measure for replacement, and how to fit a handle on a window step-by-step. It also covers compatibility questions such as “Are window handles universal for uPVC?” and practical trade advice on snag-free fitting, spindle length, and dealing with worn gearboxes.
You will also find clear opportunities to go deeper via our supporting guides:
Quick answer: how do I know which window handle I need?
In most UK uPVC casement windows, you need an espagnolette (espag) handle. To be confident, check four things:
If you measure those correctly, you can buy replacement window handles with confidence.
Understanding window handles: what they do and why they matter
How window handles work with modern locks
Most modern casement windows use a multi-point locking mechanism. When you lift/turn the handle, the spindle drives a gearbox and moves locking points (mushroom cams, rollers, or hooks) around the sash.A handle that is slightly wrong can cause:
Key UK considerations: security and compliance
In the UK, security and safety expectations commonly include:If you work in the trade, it is good practice to check customer requirements for:
What are window handles called? Common UK terms explained
“Window handles” is the umbrella term. Within that, you will see these names used in the UK hardware market:
In everyday use, many customers call any casement handle an “espag” even when it is inline, offset, locking, or non-locking. That is normal. The measurements and fixing pattern are what confirm the correct replacement.
Types of window handles: which is right for uPVC, aluminium, and timber?
Espagnolette window handles (most common for uPVC casement)
Best for: uPVC casement windows (also used on some aluminium and timber casements with espag locks)How to recognise:
Typical measurements:
Variants:
Ready to find the right handle? Browse our Window Handles range.
Inline window handles (non-handed espag handles)
Best for: casements where you want one handle that suits left or right opening sashes, or where you want a symmetrical look across a property
How to recognise:
Why choose inline:
For more identification tips and pros and cons, see ERA Universal Inline Window Handle.
Cockspur window handles (common on older uPVC and aluminium)
Best for: older casements without espag gearboxes
How to recognise:
Key measurements:
Cockspur handles can be straightforward to replace if you measure step height correctly and match the wedge position.
Tilt and turn window handles (common on modern aluminium and uPVC)
Best for: tilt-and-turn systems in flats, high-rise, and contemporary builds
How to recognise:
Tilt and turn replacements are more system-specific than espag. If you are unsure, remove and match carefully or consult the window fabricator.
Sash window handles and fasteners (timber and heritage)
Best for: vertical sliding sash windows
How to recognise:
Sash hardware is its own category; measure hole centres and match the existing style for heritage consistency.
People also ask: definitive answers (UK)
How do I know which window handle I need?
Identify the handle type first (espag, inline espag, cockspur, tilt and turn, sash). Then measure:Can you replace uPVC window handles?
Yes. Replacing uPVC window handles is usually a simple DIY or trade job:Are window handles a standard size?
Some aspects are standardised, others are not:So, there is a “common standard” for the most popular type (espag), but you should always measure.
How to measure for a new window handle?
Measure based on handle type:
Step-by-step measuring is covered in detail below.
Are window handles universal for uPVC?
Not fully. Many uPVC casements use espag handles with 43 mm centres and 7 mm spindle, which feels universal, but there are exceptions:
Measure first, then buy.
What is the standard size of handles?
If you mean the most common specification in UK homes:
There is no single standard spindle length.
How to fit a handle on a window?
For espag handles, fitting is usually:
Full step-by-step instructions are provided later with trade tips.
How do I identify my uPVC window handles?
Most uPVC windows use:
Use the visual identification diagrams below, then measure to confirm.
Visual identification: which window handle do you have?
Use these quick “diagram descriptions” to match your hardware.
Diagram 1: Espagnolette (espag) handle (side view)
Imagine looking at the handle from the side:If you see a spindle: it is almost certainly an espag (or tilt and turn) style handle. Shop Espag Handles →
Diagram 2: Cockspur handle (side view)
From the side:If you see a spur and a wedge: it is a cockspur. Shop Cockspur Handles →
Diagram 3: Inline vs offset espag (front view)
Looking at the handle from the front:If you are replacing like-for-like, match what is already fitted unless you have a reason to switch. Shop Inline Handles →
Measuring window handles: step-by-step (the part that prevents wrong orders)
Correct measuring is the difference between an easy swap and a frustrating return. Use a tape measure or, ideally, Vernier calipers for accuracy.
Tools you will need
Measuring espagnolette window handles (uPVC, aluminium and some timber casements)
1) Measure fixing centres (screw hole distance)
Fixing centres means the distance between the centres of the two fixing screws.How to measure:
Common UK size: 43 mm (very common for espag window handles).
Trade tip: If you cannot access the centre accurately, measure edge-to-edge between screws and add one screw diameter; or remove one screw and measure from its centreline.
2) Measure spindle length (critical)
The spindle length is the part of the square bar that projects from the back of the handle into the lock gearbox.
How to measure:
Common spindle lengths (examples you will regularly see in UK stock):
Why it matters:
Practical note: Many espag handles are available with selectable spindle lengths; some spindles can be cut down by a competent fitter, but it is better to order correctly.
3) Confirm spindle size (usually 7 mm square)
Most espag handles in the UK use a 7 mm square spindle. It is worth confirming if you are working on older or unusual systems.
How to check:
4) Decide handed vs inline (and why it matters)
Handed (offset) handles are left or right handed depending on which way the lever points when the window is closed. Inline handles suit either hand.
How to decide:
Trade tip: On some profiles, offset handles prevent your knuckles hitting the frame or trickle vent when operating the handle.
5) Check fixing screws and thread bite
Replacement handles typically use the existing holes. If the sash material is uPVC, repeated changes can strip the plastic.
Best practice:
Measuring cockspur window handles (older uPVC and aluminium)
Cockspur replacements go wrong when the step height is guessed.
1) Measure step height
Step height is the distance from:How to measure:
Common step heights vary; you must measure your existing handle.
Why it matters:
2) Measure fixing centres
Cockspur fixing centres are not as standardised. Measure the distance between screw centres as with espag.
If your new handle does not match existing holes, you may need to drill new pilot holes; consider whether the sash face will be left with visible old holes.
3) Check wedge/striker condition and position
Sometimes the handle is fine, but the wedge block is worn or mispositioned. If the spur slides off or does not clamp tightly, inspect the wedge:
Replacing or repositioning the wedge can restore proper closure.
Measuring tilt and turn window handles
Tilt and turn systems vary by manufacturer. Still, these steps help you order correctly:
1) Identify the fixing method and centres
Often the screws are hidden:2) Measure spindle length and type
Remove the handle and measure spindle length. Also note:If you are unsure, take clear photos of:
Choosing window handles: key features that affect performance
Security: locking vs non-locking window handles
For accessible windows, key-locking window handles are a common upgrade. They help:Practical advice:
Finish and corrosion resistance (coastal and commercial environments)
Common finishes in the UK include white, black, chrome, satin, and anthracite tones. Consider:Ergonomics and clearance
Offset or cranked designs help with:If a customer complains that the handle “scrapes fingers”, it is often the wrong offset or a poorly aligned sash.
Matching across a property
Homeowners often want every window handle to match:For installers, this is where standardising on inline window handles can reduce callbacks and simplify spares.
How to fit a handle on a window: step-by-step (espag handles)
This is the most common UK replacement job for window handles.
What you need
Step-by-step fitting instructions
Troubleshooting after fitting
For preventative care, browse Tools and Accessories for suitable lubricants and fitting bits.
How to fit a cockspur handle: step-by-step
If closure is loose even with correct step height, the wedge may be worn.
Maintenance: keeping window handles operating smoothly (and avoiding callouts)
Good maintenance prevents stiff operation, snapped keys, and unnecessary gearbox replacements.
Cleaning and lubrication basics
Tightening and inspection schedule
For homeowners: check annually. For landlords, facilities, and trade maintenance: consider checks at void periods or planned maintenance cycles.Look for:
For lubricants and fitting bits, see Tools and Accessories.
Buying window handles with confidence: a practical checklist
Before ordering replacement window handles, confirm:
Trade tip: If you are changing all handles on a property, standardise spindle lengths where possible to reduce mistakes, but do not assume every window uses the same spindle length even within one house.
Common problems with window handles (and what they usually mean)
Dropped handle (handle points down and will not lift/lock)
Often caused by:A new handle might not fix a dropped handle if the gearbox is worn. Diagnose before replacing multiple handles.
Stiff operation
Likely causes:Loose handle base
Usually:Fix promptly to avoid enlarging holes and causing the handle to rock and fail.
Key will not turn (locking handles)
Possible causes:Do not force it; relieve sash pressure by pulling the sash into the frame while turning the key.
uPVC vs aluminium vs timber: what changes when choosing window handles?
uPVC windows
Aluminium windows
Timber windows
Across all three, correct measuring remains the foundation.
Internal links: go deeper on the most important subtopics
To keep this guide definitive while still easy to navigate, these related resources expand on key areas:
FAQs (additional quick answers)
What are the different types of handles?
The main window handle types you will encounter in the UK are:What is the standard size of handles?
For espag window handles, the most common UK fixing centre is 43 mm, and the spindle is typically 7 mm square. Spindle length is not standard and must be measured.Are window handles universal for uPVC?
Many are widely compatible because espag standards are common, but they are not fully universal due to spindle length, handing/clearance, and older cockspur or tilt and turn systems.Summary: window handles made simple
If you remember only a few things from this guide, make them these:
Next steps
If you want, tell me what you have (a photo plus your measurements in mm), and I can help you confirm the correct category and the key sizes to order.
Additionally, for reference, you may search for related products such as replacement window handles for upvc windows, upvc window handle replacement, or window handle replacement when updating multiple windows.
Window Handles
Espag handles, cockspur handles, tilt and turn handles, window handle replacement guides, handle measuring, handle styles and finishes
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