Condensation on and in new window

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I've lived the same way for many years and never had a condensation problem before until i got new windows to replace the old double glazed windows. Also I don't have any problem in the room where my gas fire is nor in my bedrooms.
 
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Get in installers back. The glass needs changing.
I was going to do that but this morning the condensation inside the glazing that I'd photographed had gone! Maybe cos the room's been warmer as i had the heating on last night as it was so cold. I know I hadn't imagined it as I'd taken the photo but I can't get them back when there's nothing to see so not sure what to do.

Also a neighbour suggested that the condensation could have been outside, is that possible? As it's gone now I can't check that unless it happens again.
 
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I was going to do that but this morning the condensation inside the glazing that I'd photographed had gone! Maybe cos the room's been warmer as i had the heating on last night as it was so cold. I know I hadn't imagined it as I'd taken the photo but I can't get them back when there's nothing to see so not sure what to do.
Leave the heating on today and see if condensation forms.

On a cold day, don't heat your home and open the backdoor with the offended windows closed, I bet your issue will return.
 
On a cold day, don't heat your home and open the backdoor with the offended windows closed, I bet your issue will return.

Why/how would it? The condensation on indoor surfaces, window, if the surface is colder than the air temperature.

Condensation only forms on the outer pane, when it has been cold overnight, and the temperature outdoors rises suddenly.
 
Why/how would it? The condensation on indoor surfaces, window, if the surface is colder than the air temperature.

Condensation only forms on the outer pane, when it has been cold overnight, and the temperature outdoors rises suddenly.
the backdoor while the windows remain closed you'll be introducing a drastic temperature difference. The cold outdoor air will enter the property and depending on the temperature, this will lower the indoor temperature significantly with the heating off and the inside air cooling down, the glass can become colder than the air inside. As the air cools and the humidity in the air remains the same, the air near the window can drop to its dew point, causing condensation to form on the inner glass surface. I've seen this a lot of times in my house.
 
the backdoor while the windows remain closed you'll be introducing a drastic temperature difference. The cold outdoor air will enter the property and depending on the temperature, this will lower the indoor temperature significantly with the heating off and the inside air cooling down, the glass can become colder than the air inside. As the air cools and the humidity in the air remains the same, the air near the window can drop to its dew point, causing condensation to form on the inner glass surface. I've seen this a lot of times in my house.

And the warmth, stored in the glass, will prevent condensation forming.
 
For anyone that's interested just type 'condensation and dew point' into Google, it'll tell you all you need to know on how and why, it's certainly helped me in my job in the past to be able to explain to customers, tenants, landlords why and how
 
Mine and next doors windows this morning
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Likely a manufacturing fault.

To answer some of your other questions re the vacuum, it's very very rare that units have a vacuum, they used to exist way back but as far as I'm aware 99.9% are not nowadays, @ronniecabers is your man, a unit manufacturer so he'll be better placed to answer that.

Argon, yes whilst brilliant when it's in the unit but what DG salesman won't tell you is that by around 4 to 5 years it's all leaked out anyway, whilst technically it's a sealed unit the seal is still permeable, argon WILL deep through it, again maybe Ronnie can confirm this
As seems usual lately I'm late to the party lol...I don't seem to get notifications when I'm tagged for some reason.
As Crank says , majority of sealed units are not vacuum , just normal air . Vacuum sealed units do exist but are normally very thin and used in particular ' heritage ' situations.. as goes the Argon gas , again Crank is completely correct, on average the Argon is gone within 5 years ( no way of testing it less you have an expensive ' spark tester ' ).
ANY condensation between the two panes of glass is a failed sealed unit ...100% , it may dissipate but its still a failed sealed unit
Any condensation on the outer pane of the sealed unit ( literally outside) , is a side effect of modern double glazing and is perfectly normal, and showing that your sealed unit is doing its job.
Any condensation on the inside of the property is from water vapour , caused by many things, modern sealed units may still create a bead at the bottom of the glass... modern double glazing DOES NOT eliminate condensation despite many thinking it does. Condensation is best dealt with by Purge ventilation (opening a window ) , or dehumidifiers, or PIV/MHEV systems
 

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