NI firm: condensation on new double glazing

Belfastbelle

should I be getting condensation on newly installed double glazing?
Surely not?

clueless1682

This may sound strange, where is the condensation? Is it on the inside, outside or in the middle of the glass?
If its on the outside, that could be normal, I got some new windows recently that are gas filled, by design they'll keep all heat in so condensation can form on the outside.
If its between the glass, it sounds like a design flaw and should be looked at.
If its inside, that may not have anything to do with the new windows, did you used to get condensation on your old windows?

Belfastbelle

Hi
Thanks for the reply-
It's in the inside and I did get condensation before ( one of the reasons for getting them replaced - although I don't think we discussed that/ or got any guarantee from the supplier)

I thought double glazing didn't steam up - except in a bathroom perhaps ...
Oops

BOBS

mornings like this mine has always steamed up - esp bedrooms - when i get up i put windows on latch and they soon clear.

suki1964

Yep we get condensation on the bedroom windows as well these cold nights. Leave the vents open or best still open the window to the catch - will clear it

A.L.D.A

Condensation forms when air is cooled to its dew point. The more moisture in the air, the higher the temperature at which condensation forms.

The sort of activities that increase the moisture content of air are,
drying clothes indoors, showers, cooking, gas room heaters, gas cookers, etc. All of these require ventilation. Gas room heaters and cooking produce a lot of water valour.

If you have a defective damp proof course in the walls or damp proof membrane in the floor this will also add to the dampness.

I have also seen people trapping damp into floors after building work by covering a floor with, say, vinyl before it is properly dried out.

It is better to get condensation where you can see it than some of the places it can form. However if it is double glazing the condensation must be forming at relatively high temperatures. It suggests high humidity and/or inadequate ventilation.

As a general rule always ventilate the cold space above insulation. You can get condensation forming in the roof space or in walls.

Belfastbelle

Thanks for all the advice folks- will look at the ventilation too