UPVC Window draught - mushroom cam not helping

22 Sep 2010
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United Kingdom
Hi, just moved flat and some of the windows are UPVC double glazed and on one of them i can feel a draught. There is an 8 inch section which doesn't seal tightly - its a few mm out. Its at the handle side where one of the four mushroom cams sit, but unfortunately the cam is not properly engaging in the keep.

I have tried adjusting the cam allen key but its not really made any difference - the cam does move left/right slightly as I turn it but not by enough and is a bit wobbly anyway. I moved all 4 cams on that side but its not made a noticeable difference.

Should all the cams (even at hinge side) be adjusted to try and get a tighter overall fit? Am I better trying to move the keep itself by a few mm? It only has one screw, but presumably I can unscrew it, and shift it a little to a good bit of UPVC?
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