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Eva888

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  #3529471 20-Sep-2026 08:32
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WWHB:

 

My first answer is correct, this is a common complaint after high quality double glazing is installed. Google it and you will get loads of answers but it’s no different to dew forming on your car on colder mornings, I only get it on one side of my car but the whole car will be at the same temperature.

 

 

You know how it is, something brand new gets minute attention to every detail until it becomes just another part of the furniture and gets largely ignored. Storms used to be my biggest fear but now wishing for a big Southerly to see how watertight they are.

 

Comparing it to a car has made some sense of it for me. Wanted to make sure installation was as it should be before making final payment.

 

However…the black silicon trodden into the cream carpet has elicited plenty of muttering. Spent yesterday trying a number of cleaners but a slight shadow still remains. Even bought a spot cleaner to improve chances. 

 

The younger version of myself would have been apoplectic, but this wiser version has become a stoic and is grateful just being alive to enjoy the bigger picture. Making a huge fuss and complaining will cost everyone bad feelings and could lose jobs and I don’t want to do that. I can just grizzle here.

 

 




TwoSeven
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  #3529476 20-Sep-2026 08:55
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Looking at the pictures, I believe this is called ‘radiative cooling’ and I understand is normal.

 

i think the surface temp of the outside pane has just dropped below the dew point - which someone mentioned in a previous post.

 

at least, my guess anyway :) 





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extech
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  #3529535 20-Sep-2026 18:06
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I wouldn't completely discount the proposition that the windows may have been installed backwards. We had double glazing windows retrofitted a few months ago and could not understand why there was condensation on some and not on others. Close inspection showed that the laminated pane was inside on some windows and outside on others. The installers had to return and reverse the wrong ones. Apparently manufactured wrong at the factory.




eracode
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  #3529549 20-Sep-2026 19:45
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extech:

 

I wouldn't completely discount the proposition that the windows may have been installed backwards. We had double glazing windows retrofitted a few months ago and could not understand why there was condensation on some and not on others. Close inspection showed that the laminated pane was inside on some windows and outside on others. The installers had to return and reverse the wrong ones. Apparently manufactured wrong at the factory.

 

 

@eva888 Obviously that’s extremely interesting, given your situation. You have nothing to lose by getting the installers back to check/confirm that yours are assembled and installed correctly. Not telling you how to suck eggs but you may need to be assertive with them to get real proof.

 

I have no expertise in this area but from the above it appears that if the glazing unit is not correctly assembled and installed, (a) the laminated pane could be on the inside of the house but back to front in the glazing unit, or (b) the unit may be correctly assembled but installed inside-out in the joinery, or both (a) and (b).





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