New Window Handles for uPVC Measuring and Compatibility Guide

Replacing or upgrading window handles is a simple way to improve both appearance and security. This guide covers how to choose the right new window handles, how to measure for them, fitting tips, and maintenance advice so your windows operate smoothly for years.

Why fit new window handles?

New window handles can deliver several benefits:

Improved security: Modern handles often include better locking mechanisms and compatibility with euro cylinders.

Better operation: Worn handles or mechanisms can make windows stiff or difficult to open.

Aesthetic upgrade: New styles and finishes refresh a room’s look.

Compatibility with other hardware: Replacing handles is a good opportunity to check hinges, gaskets and locking cylinders.

If you are upgrading, consider matching or upgrading related parts such as the Avocet Slimline Offset Window Espag, TSS Cockspur Window Handles or the TSS Offset UPVC Window Handles for full-system performance.

Types of window handles

Choosing the right handle depends on the window type and the level of security you need.

Espag handles

Espag handles (or espagnolette handles) are common on uPVC and aluminium windows. They operate a multi-point locking system via an internal spindle and are often paired with an espag gearbox such as the Avocet Slimline Offset Window Espag.

Cockspur handles

Cockspur handles are surface-mounted and typically used on older windows or where the lock engages directly with the frame. They are economical and easy to fit; see the TSS Cockspur Window Handles.

Thumb-turn and key-operated handles

For properties where quick escape is required from the inside, thumb-turn cylinders such as the TL Thumb Turn Euro Cylinder are a practical option. For higher security, pair with Kitemarked cylinders like the Ultion Plus TS007 3* Kitemarked Euro Key & Turn Cylinder.

Offset and slimline options

Some frames require offset handles to clear beading or handles that match slimline profiles; the TSS Offset UPVC Window Handles and slimline espags are designed for these situations.

How to measure for new window handles

Accurate measurement is essential to ensure compatibility. Follow these steps:

Identify the handle type: Determine whether you have an espag, cockspur or another style.

Measure the backset: For espag handles, measure from the centre of the spindle to the outer edge of the handle base.

Measure spindle length and diameter: Remove the handle and measure the spindle protrusion. Standard spindles are often 7mm square; check the exact size before ordering.

Note screw hole positions: Measure distance between screw centres if replacing with a like-for-like handle.

Check the locking type: Determine if you need a key-locking handle, thumb-turn or non-locking variant.

If the window has an espag gearbox such as the Avocet Slimline Offset Window Espag, note any offsets or special profiles. If in doubt, take a clear photograph and the old handle to your supplier.

Fitting new window handles: step-by-step

Most handle replacements are straightforward and can be completed with basic tools: a screwdriver, a hex key for the spindle grub screw, and possibly a drill if holes need adjusting.

Remove the old handle

- Open the window and locate the fixing screws. Remove them carefully and slide the handle off the spindle. - For keyed or thumb-turn handles, remove the cylinder if required; keep keys in a safe place.

Inspect the mechanism

- Check the espag or locking mechanism for wear. If the spindle or gearbox is damaged, consider replacing the In-Line Window Mechanism or the relevant hinge.

Prepare the new handle

- Verify the spindle length and orientation. For offset handles, ensure the handle clears the frame.

Fit the new handle

- Place the handle on the spindle, align screw holes and fasten screws evenly. Do not over-tighten; overtightening can warp the handle base and make operation stiff. - Test operation gently, ensuring the handle moves the locking points smoothly.

Fit any keyed cylinder or thumb-turn

- If installing a euro cylinder, ensure the correct backset and screw alignment. Consider a high-security cylinder such as the Ultion Plus TS007 for enhanced protection.

Safety tip: If a window is on a higher floor, secure the sash before working to prevent accidental drops.

Security considerations

When selecting new window handles, think about security as well as looks.

Choose lockable handles for ground-floor or accessible windows.

Use Kitemarked cylinders like the Ultion Plus TS007 3* Kitemarked Euro Key & Turn Cylinder to resist forced entry.

Replace old gaskets and seals such as the B003 Bubble Gasket or B004 Bubble Gasket to ensure a snug fit and reduce leverage points around the frame.

Ensure hinges and mechanisms are in good condition; consider the Top-Hung Window Hinge - Standard or Flag Door Hinge - Stainless Steel where applicable.

Troubleshooting common problems

Problem: Handle is stiff or sticks

Check for paint or dirt around the handle and mechanism. Clean and lubricate the spindle with a light machine oil or silicone spray.

Ensure screws are not overtightened.

Inspect the espag or gearbox; replace if teeth are worn.

Problem: Handle wobbles or feels loose

Tighten or replace fixing screws. If screw holes are stripped, use a slightly larger screw or a plastic plug for a secure fit.

Problem: Lock won’t engage or cylinder turns freely

Confirm the spindle is the correct length and aligned. Check for obstructions inside the frame and ensure the locking keeps are correctly positioned.

Maintenance tips for longevity

Regularly clean handles with a mild detergent and soft cloth; avoid abrasive cleaners.

Lubricate moving parts annually with a light oil or silicone spray.

Check gaskets such as B003 and B004 for wear and replace to maintain weatherproofing.

Test locking operation periodically; catching issues early prevents damage to the window mechanism.

When to call a professional

Consider professional help if:

The espag mechanism or gearbox is damaged and difficult to access.

You suspect the frame is warped or the window alignment has shifted.

You need to fit a new euro cylinder that requires precise alignment with multiple locking points.

A professional will also ensure that any upgrades meet building regulations and that high-security cylinders are correctly fitted.

Related Reading

Explore more guides on related topics:

• Egress Hinge
• Window Stay Maintenance: Keeping Your Hardware Working

Summary

Fitting new window handles is an affordable way to improve function, security and aesthetics. Measure carefully, choose a handle suited to your window type and locking needs, and follow the simple fitting and maintenance steps outlined here. Match handles with compatible products—such as espags, gaskets and high-security cylinders—for the best long-term performance.

For compatible parts, consider: In-Line Window Mechanism, Top-Hung Window Hinge - Standard, TSS Cockspur Window Handles, TSS Offset UPVC Window Handles and Ultion Plus TS007 3* Kitemarked Euro Key & Turn Cylinder.