How to replace a uPVC window handle

Inspired by a clear UK DIY walkthrough. This guide draws on "How to replace a window handle on a uPVC window" from Paddy's DIY, a UK channel with a long back catalogue of practical home repair videos. Worth a watch before you remove anything — especially useful for seeing exactly where the hidden screws sit on a standard espag handle.

1. Identify which type of handle you have

Most modern uPVC windows use an espagnolette handle — a lever type that operates a multipoint locking mechanism when turned. Older properties sometimes have a cockspur handle, which is a different shape and fixing arrangement entirely. If you are not sure which you have, a quick photo search or a look at a window hardware supplier's catalogue will clear it up quickly.

The replacement needs to match: same type, same spindle size (the square metal rod that goes through the frame), and same screw hole spacing. Get those three things right and the swap is straightforward.

2. Measure the spindle size before buying

Spindles come in different lengths — typically 28 mm, 32 mm, 35 mm, and 43 mm for a standard espag handle. Measure the distance from the front face of the handle backplate to the back of the frame when the handle is off. Match this to the correct spindle length on the replacement.

To be fair, many replacement handles come with a selection of spindle lengths in the pack, or with an adjustable spindle — so you have some wiggle room. But measuring first saves a second trip to the builder's merchant.

3. Remove the screw cover cap

Most espag handles have a small plastic cap on the side or top of the handle body that covers one of the screws. Prise this off carefully with a flat-head screwdriver or a fingernail — they are not fixed down, just a push-fit. Do not stab at it or you will mark the frame.

Keep the cap safe. You will need it again, or if it snaps, the replacement handle pack usually includes a fresh one.

4. Turn the handle to 90 degrees to expose the second screw

Rotate the handle lever to the horizontal (open) position. This reveals the second fixing screw on the body of the handle — it is usually hidden under the lever when the handle is in the closed (vertical) position. Both screws now accessible.

This catches a lot of people out. If you try to remove the handle with only one screw out, it will not budge no matter how hard you pull.

5. Remove both screws and pull the handle free

Undo both screws with a Pozidriv screwdriver — most uPVC window fixings are Pozidriv rather than standard Phillips, and they will cam out badly if you use the wrong bit. Pull the handle body away from the frame gently once the screws are out. The spindle will slide out of the lock mechanism inside the frame.

If the handle has been on for years and feels stuck, a gentle wiggle side to side while pulling will usually free it. Avoid brute force — the backplate can crack.

6. Insert the new spindle and locate the handle

Fit the correct spindle into the new handle (or adjust the length if it is the adjustable type). Slide the spindle through the hole in the frame and into the lock mechanism. You will feel it locate into the square drive inside.

Hold the handle in position and check the backplate sits flush against the frame with both screw holes aligned. If it is slightly off, rotate the spindle a quarter turn — the lock mechanism may need to be in a specific position to accept the spindle.

7. Fit the screws and test the handle

Finger-tighten both screws first, then firm them up with the screwdriver — do not overtighten into uPVC, it strips easily. Test the handle through its full range of movement. It should move smoothly from closed to open to the tilt-and-turn position (if your window has that function) without any resistance or binding.

If the handle feels stiff, the spindle may be slightly too long. Try the next size down.

8. Refit the cover cap and check the lock

Push the cover cap back over the screw hole — it should click into place. Close the window and turn the handle to the locked position. Check the window feels secure and that the multipoint locks around the frame are all engaging. Open and close it a couple of times to confirm everything is working as it should.

Mind you — if the window was difficult to close before you changed the handle, the problem might be with the lock mechanism or the hinge adjusters rather than the handle itself. A new handle will not fix a window that is out of alignment.

When to call a handyman

Call Richard if the window will not lock securely after fitting a new handle, if the frame looks warped or the hinges have dropped, or if you have a cockspur handle with a different fixing arrangement and are not confident pulling it apart. He can also sort multiple windows in a single visit.