Misty Windows

[jasPALL]

Hi,
Just washed our caravan for the first time since purchasing a few weeks ago and noticed that the front main window is condensed inside of the outer leaf.
I cant say that I noticed it prior to washing but unsure.
Anyhow is there a way of rectifying and why would this have happened ~ Any Ideas?
I believe that caravan windows are not vacuum sealed like domestic double glazing? I noticed the small round 'vent holes ??' were loose and I removed one to try and allow some airflow into the unit ~ hope this isn't the wrong thing to do?
Thanks in advance for any assistance

 

[Damian]

You are right in as much as caravan windows are not hermetically sealed as domestic d/g units are,but also, the plastic used in manufacture does actually "breathe".
Misty windows are a quite normal thing to see on vans, particularly when moistur elevels are raised, followed by periods of sunshine.
Removing the inner window bungs is certainly the way to allow the moisture to escape.

With sun on the window the air inside the panes will expand and take with it the moisture, but if the bungs are loose, as the window cools, it will draw air back inside.
In dry warm weather the moisture will go completely.

 

[RogerL]

In dry warm weather the moisture will go completely.

More moisture will go in cold dry weather - the amount of moisture in ambient air drops as the temperature drops - a sunny sub-zero day is the best day to do it.

 

[jasPALL]

With sun on the window the air inside the panes will expand and take with it the moisture, but if the bungs are loose, as the window cools, it will draw air back inside.
In dry warm weather the moisture will go completely.

Hi Damian,
Many Thanks ~ So from your comment above do I take it that the Bungs being loose is a good or bad thing?

 

[Damian]

With the bungs loose they will allow mor eair in than tight fitting ones, so it is probable that you will see the misting more often, but apart from being a bit of a nuisance it is not a terminal problem.