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Paddy's DIY How to replace a cockspur handle on an old aluminium window
Another great instructional video brought to you by Paddy's DIY

In this video I’m going to show you how to replace a cockspur handle on an aluminium window

This is a cockspur window handle, and they are usually found on aluminium and old uPVC windows. The spur on the handle closes down over a plastic wedge on the window frame to close and lock the window. Cockspur window handles come in a number of heights. 21mm, 17mm & 13mm are usually found on old uPVC windows and 9mm are usually found on aluminium windows.

With aluminium windows the window handle will nearly always be fixed to the sash with rivets. And the window handle will nearly always be fixed immediately in front of the glazing. So before we start we need to take the appropriate precautions to prevent breaking the glass. I remove the bottom glazing seal and I can see there is enough room to drill out and remove the old rivets. This gap will differ from window to window. It is so easy to accidentally break the glazing when replacing a cockspur window handle. I would definitely recommend taking out the glazing, replacing the handle and then refitting the glazing.

• Remove the bottom rubber glazing seal with a flat screwdriver.
• Use a paint scraper and put it in the gap behind the handle. This will protect the glazing as you drill off the rivets.
• Next fit a metal drill bit into your drill. This is a 5mm drill bit. And carefully drill the heads off the rivets.
• Remove the old handle base and remove the remains of the old rivets.
• Drill out each hole
• The new handle lines up exactly with the old holes. Line up the new handle and fit a rivet into the hole, the rivets I’m use are 4.8mm diameter. It is essential you choose the correct length rivet. Too short and the rivets will pull out. Too long and they can break the glazing
• Pull the rivet using a riveter. Repeat on the remaining holes.
• Push back in the rubber glazing seal
• Test the operation of the handle and to finish off, fit the cover cap

As you can see the window is difficult to open and close, this is because the hinges are broken. This is the reason the existing handle broke in the first place. All the extra force used to open and close the window when the hinges are broken is put on the window handle causing it to break.