windows misting on the outside

GT60

Hi as you can see all my windows apart from my composite back door window and a window that was replaced a week after fitting because it arrived broken.
This happens every so often and not every morning.
I had the windows and door fitted about six years ago and have had this issue since.the ones below are just some of them sorry i dint know how to resize the photos

RobM99

Happens on every car every day in the chill, happens to my house windows but only south facing. 

Reason? It's just natural condensation, like dew on the grass.

Bendy_House

Yes, it's good news.

It means that your new windows are so cold on their outside panes, that moisture condenses on them. The reason they are cold on the outside is that the indoor house warmth isn't getting out.

Ergo, they are working just great 🙂

FreeBear

RobM99 said:

Happens on every car every day in the chill, happens to my house windows but only south facing. 

Reason? It's just natural condensation, like dew on the grass.

I get it on north as well as south facing windows. It is nothing to worry about and shows that the windows are doing their job of keeping the cold out.

John_the_Boy

Perfectly normal, windows are better insulated so are colder on the outside glass surface so mist up more. Get it at certain times on our triple glazing.

breaking_free

That's how my windows look on cold mornings. As others have said, perfectly normal.

GT60

Thanks Everyone

bob_a_builder

I noticed this on ours the other day too , but for a different reason

The window on the right is a new unit ( 1 year old) , the one on the left is original ( 12 years old) 
So the old one is misting on outside, the new one not 
Which given  answers above (and logic) is a bit worrying about heat retention thru this unit 

But there is no internal misting so it must still be a sealed unit 

And we have the same case on another window where one side was replaced and other original - and the new ( 1 year old ) one is not misted on outside

TimSynths

I had double glazing installed last week (original 60-year-old wooden single glazed frames replaced) and have noticed the very same this morning. At first, I was worried that it was on the inside but on inspection it's not the case- glad to hear this is a good sign of the units doing a good job! I've spent a lot of money in the hope that the home will be warmer, and my gas use will be reduced. So far so good!

Bendy_House

bob_a_builder said:

I noticed this on ours the other day too , but for a different reason

The window on the right is a new unit ( 1 year old) , the one on the left is original ( 12 years old) 
So the old one is misting on outside, the new one not 
Which given  answers above (and logic) is a bit worrying about heat retention thru this unit 

But there is no internal misting so it must still be a sealed unit 

And we have the same case on another window where one side was replaced and other original - and the new ( 1 year old ) one is not misted on outside

Blimey! That mist is NOT inside the 'sealed' unit? Def on the outside?

In which case - blimey.

Any chance that the sun has hit that first pane earlier? Or you had a curtain pulled over the LH one (so not getting as much house warmth)?

Other than that, I'm stumped by this, and would also have Qs to ask the installer of the new units.

A thought - the overall unit thicknesses must be similar? But is there any chance that the new unit has thicker glass for safety/regs purposes, so has a thinner void as a result = less insulation value?

bob_a_builder

Defo on the outside - you can see mark (upside down V)  I made on outside of window ( on opposite house roof) 
No curtains, horizontal blinds but not used as room not in use at moment 
Sun not got round to that side at all yet

The bar separating the glass is different new to old - old one seems to have a insulator break between inner and outer side

Have a IR thermometer, will see what differences I can read on inside when its a bit colder outside