Condesation on my double glazed window.

kerdiff

Hi, does anyone have any ideas what causes this circle of condensation on my double glazed window.

MicktheMan

Interesting image there. I suspect it is a weakness in the double glazed unit possible a severe reduction in the spacing or even bridging of the panes. I've seen a similar pattern once before when thermal imaging a rather large dg unit.

Are the windows new or is this something which has just appeared when previously nor present?

listermint

The more thermally insulating the glass is, the lower the outer pane temperature is likely to be and the greater the risk of condensation on the external surface

Perhaps that's the most thermally efficient part of your glass ?

Water John

Large double glaze expanses, especially commercial ones, use nylon spacers to maintain the space. It is the only logical explanation, as Mick points out.

10-10-20

Is that pane a square or rectangular?
At first glance it just looks like a thermal bridge at the very mid-point of the horizontal and vertical axis, but the circle is so regular with little condensation at the edges that it makes me wonder otherwise.
I presume that the moisture is on the inside pane, ie in the room, and not between the glass sheets?
Did you by any chance have an ornament at this location?

delly

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