You fix the rattles by fitting new (or rejuvenating old) top felts.
The whole job replacing felts takes less than an hour per window.
one tip is to have a hooked tool to get the felts out, I used a pair of circlip pliers to get under the felt and then a pair of fine point pliers to grab it and pull it out.
Other than that its an easy job.
While you've got the top disassembled its worthwhile modifying the window lock mechanism.
The window lock works by using the tongue at the top to wedge into a gap in the runners of the two panes. It wears and no longer works.
- A temporary fix is to cut (or file) down the shoulders of the mechanism, being careful not to cut out the base of the pyramid. (the red line at the top)
- Then wedge a piece about 2mm-3mm of hard plastic or metal into the gap in the cam device. (The black bordered red trapezoid shape)
Diana![]()


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It's great stuff, I haven't had rattles from the windows since I installed it

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