Replacement uPVC Window Handles: Espag vs Cockspur Identification

Replacement uPVC window handles are a common DIY fix and a regular task for tradespeople servicing older windows. Correctly identifying whether a handle is an espagnolette (espag) or a cockspur type, and understanding the measurements and fixing arrangements, avoids wasted purchases and ensures a neat, secure replacement. This guide explains how to identify both styles, what to measure, practical replacement steps and compatibility considerations for straightforward installations.

Recognising espag (espagnolette) handles

Espag handles operate a multi-point locking mechanism via a rod or gearbox inside the window sash. The handle rotates through 90 degrees to move internal cams or a shootbolt, and there is usually a spindle that engages with a gearbox in the frame.

Key visual signs:

• Handle has a square or slotted spindle protruding from the backplate that enters the window's gearbox.
• No visible hooked latch on the sash edge; locking action is internal.
• Often supplied with a push-in spindle cover or keyed locking option.

Practical identification steps:

• Open the window slightly and inspect the side of the sash for a small gearbox or cam plate near the handle pivot.
• Look for a square spindle on the handle backplate when the handle is removed; espag spindles are typically 7mm or 8mm square.
• Count the number of screw holes on the backplate and note whether the handle locks with a key — many espags are key locking.

When replacing an espag handle, match the spindle size, gearbox type (gearbox to handle interface), screw hole centres and handedness (left or right). A commonly used replacement is the TSS Cockspur Window Handles, which comes in several spindle lengths and handed options suited to typical British uPVC windows.

Recognising cockspur handles

Cockspur handles are simpler and operate by pivoting a hooked arm (the cockspur) that bears against the frame to hold the window closed. They are surface-mounted and usually used on older or simpler windows.

Key visual signs:

• A visible hooked arm or fixed lug that sweeps against the frame edge when the handle is turned.
• The handle is mounted on the sash face with visible screws; no internal gearbox or spindle.
• Often very compact and economical, with a direct hook-to-frame action.

Practical identification steps:

• With the window closed, operate the handle to watch whether a hook engages with the frame directly.
• Note the hook’s shape and length — some hooks are angled, some are straight, and varying lengths affect compatibility.
• Measure distance from the handle fixing screw centre to the hook tip to match replacement geometry.

For straightforward replacements, consider the TSS Cockspur Window Handle, available in several finishes and hook lengths to fit standard cockspur setups.

Measuring and noting critical details

Accurate measurement prevents failed fits. Record these details before ordering replacement upvc window handles:

• Backset/spindle length: For espag handles, measure the distance the spindle projects from the sash or record the existing spindle length marked on the handle; common lengths are 35mm, 45mm and 60mm.
• Spindle size: Use a calliper to measure the square spindle width (usually 7mm or 8mm).
• Fixing hole centres: Measure the distance between screw holes on the handle backplate for both espag and cockspur types.
• Screw type and length: Note countersunk or raised screw heads and ensure replacement screws will sit flush.
• Handing: Determine whether the handle is left- or right-handed by the direction it turns to lock (visualise the sash from the inside).
• Finish and locking: Decide if a keyed lock or non-locking handle is required and match colour (white, gold, chrome, black, etc.).

Record these dimensions on paper or photograph the handle with a ruler for tradespeople to review.

Removal and installation tips

Preparation reduces damage to the window frame and ensures a clean result.

• Tools required: cross-head screwdriver, 7mm/8mm spanner or socket for espag spindles if needed, replacement screws, lubricant and cleaning cloth.
• For espag handles: unlock and rotate to the neutral position, remove the fixing screws, gently pull the handle off the spindle. If the handle is stiff, apply a small amount of penetrating lubricant and let it work before levering carefully to avoid breaking the backplate.
• For cockspur handles: remove visible screws securing the handle plate. If the hook is adhered by paint, free it gently with a thin spatula to avoid chipping the uPVC.
• Trial-fit any replacement before tightening screws fully to ensure the handle operates and engages correctly with the gearbox or frame.
• Use threadlocker on screws in coastal or high-vibration situations to prevent loosening.

Practical considerations:

• Replacing aged fixings with stainless steel screws reduces future corrosion.
• When replacing a cockspur handle with an espag, confirm the window sash is compatible with internal locking mechanisms before changing types.

Compatibility and security considerations

Some handles are purely cosmetic replacements, while others improve security. Espag handles that are key-lockable or compatible with ProSecure features offer better resistance to forced entry than basic cockspur types. When upgrading, check the locking points and the condition of the striker plates and keeps; worn keeps can undermine a new handle’s effectiveness.

For a high-quality lever that balances security and style, the TSS Offset UPVC Window Handles suits many modern uPVC windows and is available in secure locking options. Tradespeople should always confirm that the handle’s security rating meets project requirements and that the chosen model integrates with existing hardware.

Final checks and maintenance

After installation, confirm smooth operation through several cycles and that the handle fully engages the locking mechanism without binding. Apply a light silicone-based lubricant to moving parts annually and check fixings for tightness. Keep spare handles and key codes documented for future replacements or tenant handovers.

For further detailed guidance on choosing the correct profile, finishes, and measurement diagrams, homeowners and tradespeople can consult the comprehensive resource: Window Handles Guide.