Question for double glazing experts

[cliveb]

Woke up this morning to see that we have condensation on the inside AND outside of the bedroom window. (Note: this is not in between the panes, which would indicate a failed seal).

I understand how a window can be colder than the air either inside or outside, but how can it be both?

 

[Crow]

Just needs a rapid change in the humidity level of the air, which could be on either side.
So for instance taking a shower inside and a mist coming in outside.
And remember that the two panes of glass can be at different temperatures.

 

[cliveb]

Just needs a rapid change in the humidity level of the air, which could be on either side.
So for instance taking a shower inside and a mist coming in outside.
And remember that the two panes of glass can be at different temperatures.

Funny you say that, because it's now become misty in the last half hour.

 

[jim8flog]

This is something which often happens with my kitchen double glazed French door. The outside is located just above the main drain and very close to the boiler flue (within a minimum of building regs).