Upgrading from Cockspur to Espag Handles: Is It Possible?

Upgrading from a cockspur handle to an espag handle is a common query for window renovators, installers and confident DIYers. This guide explains whether it is possible, what matters to tradespeople, and the practical steps and parts you need to consider when replacing a cockspur handle with a modern espag handle. If you are working on casement windows or advising customers, this article will help you decide whether the swap is feasible and how to carry it out correctly.

What is a cockspur handle and how does it differ from an espag handle?

A cockspur handle is a simple surface-mounted locking handle used predominantly on older uPVC and aluminium casement windows. The handle operates directly against a keep; the fastener is a short hook or spur that locks into a strike. Cockspur handle designs are straightforward and inexpensive but offer limited security compared with multi-point espag systems.

An espag handle, short for espagnolette, operates a spindle that turns a locking mechanism inside the window sash. Espag systems allow multi-point locks and hooks, giving better security and the option of shootbolts. The espag handle connects to an espagnolette gearbox or multi-point lock and is usually used on modern uPVC windows.

Is it possible to replace a cockspur handle with an espag handle?

Yes; in many cases it is possible to upgrade from a cockspur handle to an espag handle, but several factors determine feasibility:

• Window frame and sash thickness: the sash must accept an espag gearbox and spindle; slim sashes can be problematic.
• Existing lock cut-outs: cockspur windows may lack the rebates or holes needed for an espag gearbox and keepers.
• Backing plate and screw positions: you may need to drill new fixing holes or use adaptors to fit an espag handle.
• Compatibility with the existing locking mechanism: if the window uses a simple latch, you will need to install a new espagnolette or multi-point lock.
• Regulatory and safety considerations: ensure changes do not affect escape routes or ventilation when replacing hardware.

Surveying the window: what to check before upgrading

Before ordering parts, carry out a full survey so you can recommend the correct espag handle and associated hardware. Key checks include:

1. 1Measure the backset and faceplate depth of the existing lock area; if unsure, compare against common espag sizes such as 16 mm or 22 mm spindles.
2. 2Check the thickness of the sash and the inner frame to ensure there is enough material to accept the espag gearbox and fixings.
3. 3Inspect the meeting rail and outer edge for room to fit keeps and striker plates; casements with narrow profiles may need adaptor kits.
4. 4Look for evidence of reinforcement; some older sashes must be strengthened or a steel plate fitted to accept the espag mechanism securely.
5. 5Note whether the existing handle location and orientation will suit an espag handle spindle position; handle holes may need adjusting.

Parts and tools needed for the upgrade

Typical components and tools you will require to replace a cockspur handle with an espag handle include:

• Espag handle set with matching spindle length and screw centres
• Espagnolette or multi-point gearbox compatible with the sash
• Keeps and striker plates to suit the new locking points
• Drill, wood bits or masonry bits as appropriate, and a chisel for small recesses
• Sealant and channelling tools if weatherstripping is altered
• Reinforcement plates or packers for thin sashes
• Template for accurate drilling of handle screw centres and gearbox location

Step-by-step overview for tradespeople

Follow this high-level sequence when upgrading a cockspur handle to an espag handle. Adjust steps to suit specific window builds and site conditions.

1. 1Remove the cockspur handle and clean the area; retain any original keeps in case of reuse.
2. 2Measure carefully and mark the new spindle hole and screw centres using the espag handle template.
3. 3Prepare the sash: drill the spindle hole, cut any recess for the gearbox, and fit reinforcement if needed.
4. 4Fit the espagnolette or multi-point gearbox into the sash; check smooth operation before final fixings.
5. 5Install the espag handle and fix securely; check that the spindle engages and that locks operate correctly.
6. 6Fit keeps and striker plates in the frame; test locking points and adjust keeps for smooth engagement.
7. 7Complete any sealing or finishing; instruct the homeowner on operation and maintenance.

Common challenges and troubleshooting

Upgrading can run into recurring issues; experienced installers will watch for these problems and plan mitigations:

• Misaligned keeps: adjust striker plates or use shoulders on the espag to correct alignment.
• Insufficient sash thickness: use a steel reinforcement plate or bespoke packers to allow secure fixings.
• Wrong spindle length: measure twice and choose an adjustable or extended spindle where possible.
• Restricted internal space: choose low-profile espag gearboxes or modify the sash only if structurally acceptable.

When advising clients, present the trade-offs: improved security and aesthetics versus additional labour and possible sash modification costs. For heritage windows, consider reversible solutions or consult conservation officers before cutting into original frames.

Recommended Products

Based on this article, you may find these products helpful:

• ERAB Espagnolette Window Lock Universal Lock Replacement
• Avocet Slimline Offset Window Espag
• In-Line Window Mechanism
• Offset Window Mechanism
• TSS Cockspur Window Handles

Conclusion: when to upgrade and when to reconsider

Replacing a cockspur handle with an espag handle is often possible and usually desirable for better security, operation and compliance with modern standards. Tradespeople and capable DIYers can manage the conversion on many uPVC and aluminium casements, provided the sash can accept a gearbox and reinforcement is available when needed. Always survey thoroughly, measure accurately and choose compatible parts. If sash structure or heritage constraints make modification inappropriate, consider upgrading to improved cockspur hardware or advising a full sash replacement.

If you need technical guidance on specific espag components, templates or reinforcement options for cockspur handle upgrades, contact a specialist supplier or consult installation manuals for the hardware you plan to use.