How to Replace a uPVC Window Handle: A Simple Step-by-Step Guide

If your uPVC window handle is broken, loose, stiff, or simply outdated, the good news is it’s a relatively easy DIY fix. Whether you’re upgrading for better security or refreshing old hardware, this guide will show you how to replace a uPVC window handle quickly and safely.

Why You Might Need to Replace a uPVC Window Handle

There are several reasons why you might want or need to change your window handle:

• The handle is broken or no longer locks properly
• It feels loose, stiff or jammed
• You’re upgrading to a locking handle for added security
• The old handle looks worn, faded or discoloured
• You’re replacing all your window furniture for a fresh, updated look

Whatever the reason, knowing how to replace a uPVC window handle is a valuable DIY skill that can save time and money.

Tools and Parts You’ll Need

Before you begin, make sure you have the following tools and parts ready:

• Replacement uPVC window handle (correct type and spindle size)
• Flathead screwdriver (to remove screw cover caps)
• Phillips screwdriver
• Tape measure or ruler (for measuring spindle length)

Optional: 

• Silicone spray (for maintenance or stuck parts)

Step-by-Step: How to Replace a uPVC Window Handle

Replacing a uPVC window handle is usually a straightforward process. Here’s how to do it:

Step 1: Identify Your Existing Handle

There are two common types of uPVC window handles:

• Inline handles – Straight handles that can turn left or right (suitable for top or side-hung windows)
• Cranked (offset) handles – Angled to one side, typically designed for side-hinged windows

Check whether the handle is locking (with a key) or non-locking, and measure the spindle length from the base to the tip. Common spindle sizes in the UK are 40mm, 50mm, or 55mm.

Tip: If you’re unsure about your handle type, take a photo and bring it to a hardware store or glazing specialist.

Step 2: Remove the Old Handle

1. Lift the handle to expose the fixing screws.
2. Pry off the screw cover caps with a flathead screwdriver if present.
3. Use a Phillips screwdriver to unscrew the two fixing screws.
4. Gently pull the handle away from the frame, sliding the spindle out.

If the handle doesn’t budge, avoid forcing it; it may be stuck due to rust or a damaged mechanism.

Step 3: Fit the New Handle

1. Align the new handle with the existing spindle hole.
2. Slide the spindle into place, ensuring it fits snugly.
3. Secure with the provided screws, tightening evenly.
4. Test the handle,  open, close, and lock the window.
5. Replace the screw caps to finish the job neatly.

Make sure the handle operates smoothly. If it feels stiff, apply a small amount of silicone spray to the mechanism.

Common Mistakes to Avoid

While learning how to replace a uPVC window handle, avoid these common DIY pitfalls:

• Ordering the wrong spindle length
• Choosing the wrong handle type (inline vs offset)
• Overtightening the screws, which can crack the plastic
• Ignoring alignment with the locking mechanism
• Replacing a handle when the actual problem lies in the internal window lock

Where to Buy Replacement uPVC Window Handles

Replacement handles are widely available from:

• Local hardware and DIY stores
• Specialist window and glazing suppliers
• Online retailers like Screwfix, Toolstation, or Amazon

Handles come in a variety of finishes, such as white, chrome, satin silver, or black, and many are sold with matching keys and screws.

If you’re replacing multiple handles, consider buying in multi-packs to save money and keep the style consistent.

When to Call a Professional

While most uPVC window handles are easy to replace, there are situations where you might need expert help:

• The handle is stuck and won’t move, even after removing the screws
• The spindle is jammed or snapped inside the mechanism
• The window won’t open despite the handle removal
• You suspect an issue with the internal window gearing or espagnolette lock

In these cases, a window repair technician can diagnose and fix the issue without damaging the frame.

A Quick Fix That Makes a Big Difference

Now that you know how to replace a uPVC window handle, you can improve both the function and appearance of your windows in less than 10 minutes. It’s a small job with a big impact, especially if you’re upgrading to modern locking handles or freshening up a dated interior.

Whether you’re fixing a single handle or giving your home a full refresh, don’t overlook the importance of good-quality hardware for everyday comfort and peace of mind.

Frequently Asked Questions

Are uPVC window handles universal?

Not always. Handle types and spindle lengths vary. Inline handles are more universal, but it’s always best to measure before buying.

Can I replace a locking handle with a non-locking one?

Yes, but you’ll lose the added security. For most homes, key-locking handles are recommended, especially on ground-floor windows.

What’s the standard spindle size for uPVC window handles?

40mm is the most common, but sizes range from 15mm to 55mm. Always measure your existing spindle before purchasing.

Do I need to replace the whole window to fix a broken handle?

No. In most cases, only the handle or locking mechanism needs replacing. It’s a small, affordable fix.