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Our window experts have kindly agreed to share their wisdom on such topics as condensation in double glazing, leaking windows, window sizing, resealing, whistling and howling, fixing cracked and broken windows and much more.

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1,600 Windows questions

Condensation in double glazing - what are the solutions?

Just moved in to a house which has a number of windows with condensation between the glass panels. Can they be cleaned or do they require replacing? Thanks.

Which are the BEST quality UPVC windows to install?

Is one brand of UPVC window better than another?

Please advise.

Thank you.

My upvc door will not open, it will lock and unlock but will not actually open. What can i do?

can the rubber sealants be replaced around double-glazed window units rather than replacing the whole window; windows installed at least 15 years ago?

Thanks both for your advice. It is much appreciated. Have now approached a couple of window fitters for quotes. Regards, Neil

my new windows have condensation on them in the morning- about 1cm to 1 inch deep, should this be happening? thanks.

Thanks all for your replies - don't have trickle vents, how easy is it for them to be put in if Windows already in? Thanks

Is there a way to remove dry expanding foam from a UPVC window frame without scratching it? As the expanding foam is now like glue

Advantages and disadvantages of PVCU and aluminium for replacement windows?

Which one is best?

Cost of installing velux window

How much would fitting a small velux window to the stariwell (staircase to loft room) cost approx (labour + window + flashing)?

A question about tilt and turn windows

I seem to have somehow opened my window whilst it was tilted. I've tried everything I can think of to rectify it, but nothing seems to work. It's almost as if the top part has come off the hinge. The window handle seems to also be jammed and won't move any way. Any ideas on how to fix would be gratefully received. Thanks

UPVC back door won't lock

Hi, problem locking my back door - the bolting mechanism seems to work fine, ie. when I raise the handle the 4 bolts go into their correct positions but the key will not turn enough to lock the door. Seems like there's an obstruction of some sort stopping the cam (think that's the correct term?) from rotating in the cylinder. Have replaced the cylinder with a new one but to no avail. Also, tried to remove the brass strip that runs the length of the door to try to see what the problem is, but I need to remove the 4 locking bolts to release the strip and they just keep turning in the door when I try to unscrew them with an allen key. Seems like they are not threaded, which is a bit puzzling to say the least?

Any help much appreciated

Sorted! :) The problem was with the locking mechanism that's attached to the brass strip mentioned above. I managed to remove it from the door by simply undoing all the screws - doh!... then checked the locking mechanism - didn't really know what I was looking for, but as luck would have it a very small piece of metal dropped out. Wasn't sure at first if the piece of metal had broke off something important in the mechanism and I would have to buy a new one. Thankfully it did not, and once replaced the lock worked just fine. :) Obviously the piece of metal must have been the cause of the lock jamming.

Thanks very much for the responses. Hopefully the above will help someone else with a similar problem.

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