Internal condensation in triple glazed windows, possible?

Galego

Just wondering if internal condensation is possible in triple glazed windows since the the coldest point of a triple glazed windows is its litter pane.

Hope someone can answer this question.

sydthebeat

It certainly is possible.

There are three main factors.
There internal temperature, the external temperature and the internal humidity.

If the internal temps are high, say 27deg, with high humidity 90%+, and external temps are say 4deg, then condensation can certainly occur internally on triple glazed windows.

fclauson

sydthebeat wrote: »

It certainly is possible.

There are three main factors.
There internal temperature, the external temperature and the internal humidity.

If the internal temps are high, say 27deg, with high humidity 90%+, and external temps are say 4deg, then condensation can certainly occur internally on triple glazed windows.

True - but it means your ventilation needs reviewing

Have had condensation only after very hot steamy bath - and it only lingers until door opened or bath drained - It would be hard to maintain right conditions for long unless you want to be completely "cooked" getting out of bath

Galego

The reason why I ask is the following.

I had the glazing replaced in the 20 years old DG and also had a TG new window fitted in a garage conversion. I now suffer condensation in the DG but no signs of it in the TG. There is outside condensation in the TG but nothing inside. As opposite the DG get quite a bit of condensation in the inside pains.

I am now thinking that the DG frame are sh*te and should have replaced them at the time instead of replacing just the glazing.

I read that condensation only forms in the coldest point of an insulated surface and in TG this being the outside pain I thought that was the reason why they wouldn’t get condensation in the inside. Is this correct?

Calahonda52

Galego wrote: »

Just wondering if internal condensation is possible in triple glazed windows since the the coldest point of a triple glazed windows is its litter pane.

Hope someone can answer this question.

There are 6 possible surfaces here so I am not clear what you mean by litter pane.

The other answers have addressed the issues if its on the room facing surface.

Condensation these damp humid mornings on the outside surface, e.g. road facing, is common as this is the coldest pane and it is easy tell which windows are good quality from just driving along and spot the difference.
We have 3 such houses in our commune, all upgraded double glazed panels in existing frames, so its not just a 3G phenomenon.

Galego

Calahonda52 wrote: »

There are 6 possible surfaces here so I am not clear what you mean by litter pane.

The other answers have addressed the issues if its on the room facing surface.

Condensation these damp humid mornings on the outside surface, e.g. road facing, is common as this is the coldest pane and it is easy tell which windows are good quality from just driving along and spot the difference.
We have 3 such houses in our commune, all upgraded double glazed panels in existing frames, so its not just a 3G phenomenon.

I am referring to the internal pain in the DG which faces the room.

I've had outside (road facing) condensation in the DG (upgraded with new glazing) some days during autumn but lately I get condensation in the inside pane (room facing). This is annoying me as the room with TG has zero inside condensation, does have outside condensation which I do not mind about it.

I am starting to suspect that the frames are sh*te regardless the new glazing which I put on them.

What is your experience with yours? Did you also upgrade the glazing and left the frames? How old were your frame? Getting any inside condensation?

Thanks.

fatty pang

If condensation is manifesting on the glass then the IGU is colder than the frame - so your frames are probably satisfactory. In my experience internal condensation on windows is invariably caused by excessive internal humidity. Get that addressed in the first instance.