Condensation on the outside of windows

[Bambi]

Hello,

I have a window section consisting of three identical windows and a patio door, where I have found condensation on the outside of the door and one window. Can any conclusions be drawn from this, that they are more airtight or tight enough to keep the heat inside the house?

Best regards,
Bambi

 

[strevert]

They insulate well since condensation forms on the outside, I believe. I get the same at my place early in the morning and I have new 3-glass windows.

 

[ullberg]

As mentioned, if the condensation is on the outside it's usually a good sign, there's a lot written about this on BH, e.g., this slightly older thread:
http://www.byggahus.se/forum/fonster-dorrar/57754-kondens-pa-fonstren.html
But you can find much more

 

[Nissepisse]

My theory:
They are good. Warm on the inside and cold on the outside suggests good insulation. They cool down at night and warm humid air hits the window in the morning and condenses.
My second theory:
It could also be that the glass emits a lot of radiation at night towards the cold and clear infinity out in space and therefore cools down.

 

[Bambi]

Thank you, but then are the two windows that are right next to it that don't have condensation having a bad U-value or poorly sealed at the frame? Best regards

 

[vectrex]

Thank you, But does that mean the two windows that sit right next to each other, which don't have condensation, have a bad U-value or are poorly sealed at the frame? Regards

Not necessarily bad, but probably worse. It could also be due to other factors, such as having more eave overhang there or a large tree growing there that blocks heat radiation...

 

[Nerre]

Or not as exposed to humid air. Or positioned "hidden" so they are not cooled as much by the night sky. It is difficult to know without seeing a picture of their placement.

 

[Bambi]

Thank you,

I will take photos tomorrow. I don't think the external circumstances differ, is there something simple one can do to avoid the heat leakage?

For example, remove the external plastic strip that holds the glass and press in the windows and reassemble again, remove the panel board between the windows and fill with insulation if it has been neglected?

 

[KnockOnWood]

A similar case was up for discussion a few years ago.

It turned out that a window was missing argon gas between the panes.

http://www.byggahus.se/forum/fonster-dorrar/186523-kontrollera-u-vardet-pa-nya-fonster.html?showAll