How to Replace Window Handles for uPVC Windows: Tools and Tips

Replacing a faulty or outdated window handle on uPVC windows is a common maintenance task that can be completed with basic tools and some careful attention. This guide covers the essential tools, step-by-step instructions for the most common handle types, troubleshooting tips and safety considerations, giving homeowners and tradespeople the confidence to carry out the work efficiently and correctly.

Tools and materials required

• Screwdrivers: Pozidriv and flat-head, variety of sizes
• Allen keys (2.5mm–4mm) for some espagnolette handles
• Torx bits for certain security handles
• Replacement handle suited to the window type
• Tape measure and pencil
• Masking tape to protect profiles
• Threadlocker (medium strength) for longer-lasting fixings
• Small brush and cloth for cleaning
• Optional: cordless drill with clutch and screw-drive bits

Choosing the right replacement handle is essential. For windows with an espagnolette gearbox, a security espag handle such as the TSS Cockspur Window Handles is a direct swap in many cases. For older uPVC windows using a cockspur mechanism, consider a durable option like the TSS Cockspur Window Handle. For mainstream profile fittings the TSS Offset UPVC Window Handles offers a reliable, familiar design.

Identifying the handle type

There are three common handle types on uPVC windows:

• Espagnolette (espag) handles that operate an internal gearbox and multipoint locking
• Cockspur handles that engage an external latch onto the window frame
• Lockable casement handles with a key cylinder

Correct identification determines the removal method and the replacement required. Inspect the mechanism by opening the handle to its closed position and looking for visible screws, an end cap, or a security bolt.

Removing an espag handle: step-by-step

1. Open the handle to the vertical or horizontal position (as supplied). 2. Look for a small grub screw in the handle neck or a plastic cover on the back of the lever. If a cover is present gently lever it off with a flat-head screwdriver, protecting the profile with masking tape. 3. Undo the grub screw or remove the fixing screws that clamp the handle to the spindle. Keep fixings safe for reuse if compatible. 4. Pull the handle straight off the spindle. If stiff, wiggle gently while applying even pull to avoid damaging the spindle. 5. Inspect the spindle and gearbox for wear or damage. Measure spindle length and square size so the new handle matches. 6. Fit the new handle: slide it onto the spindle, align so the handle sits correctly when closed, and tighten the grub screw or screws. Apply a small amount of threadlocker if desired.

Practical tip: If the spindle has worn flats or is rounded, replacement of the locking gearbox or use of a longer spindle may be necessary. Tradespeople should carry a selection of spindle sizes and replacement gearboxes.

Removing a cockspur handle: step-by-step

1. Open the handle outward to expose the two fixings on the face of the handle backplate. 2. Remove the two screws using an appropriate screwdriver. Some cockspur handles have security screws—use the correct bit. 3. Pull the handle away from the window. The cockspur arm will typically be attached; remove this if fitting a like-for-like replacement. 4. Clean the area and check the strike plate on the frame for wear; replace if the locking edge is damaged. 5. Fit the new cockspur handle, ensuring the arm engages fully with the frame strike when closed and that the handle moves freely without fouling the gasket.

Practical tip: Cockspur handles are often retrofitted to older frames. Ensure the new arm length matches the sash-to-frame gap for reliable engagement.

Lockable handle replacement and security considerations

Lockable handles require extra care. Remove keys and check that the new handle’s key or cam orientation matches the sash. When fitting security espag handles, ensure the handle’s locking cam sits correctly over the gearbox so the internal locking cams operate fully. Use stainless steel fixings where possible to prevent corrosion and ensure longevity.

For enhanced security, replace non-locking handles with a lockable model when compatible. Many modern espag handles include anti-snap or torque-resistant features that improve security.

Common problems and quick fixes

• Handle stiff or difficult to operate: apply a silicone spray to the handle mechanism and hinges; avoid oil-based lubricants that attract dust.
• Handle wobbles after fitting: check that fixings are tightened evenly; over-tightening can distort plastic components, so use a drill with clutch or tighten by hand to a firm setting.
• Spindle too short/long: measure from face of handle to gearbox and source a handle with the correct spindle length, or use an adjustable spindle adaptor.
• Stripped screw heads: use a screw extractor kit or apply a rubber band over the head for extra grip when removing.

Safety and finishing touches

• Always support the sash when working on higher windows. Use a second person for larger, heavier windows.
• Protect uPVC profiles with masking tape to avoid scratches from tools.
• After fitting, check operation through the full range and ensure seals compress correctly to maintain weather performance.
• Dispose of old handles and fixings responsibly and record the part numbers of replacements for future maintenance.

When to call a specialist

Some faults—such as a broken espagnolette gearbox, distorted sash, or complex locking failures—are better dealt with by an experienced window engineer. Call a specialist when replacement parts are not a direct match or the sash operation remains unsafe after a handle swap.

Replacing window handles for uPVC windows is a straightforward task that restores function and improves security when completed with the right tools and correct parts. With accurate identification and the proper replacement, a reliable, long-lasting fit is achievable for both homeowners and tradespeople. For more on selecting the correct handle and technical specifications consult the Window Handles Guide.