Out in the sales (window shopping mostly) it occured to me that I have
never noticed any condensation on shop windows - or even signs of
ponding on the internal cills.

The few I looked at today did not have any heaters near the windows,
and doors were far enough away so as not to give much air circulation
to the some of the glazed areas.

It was on my mind, because I have been asked to look into designing a
'frameless' conservatory which will require large sheets of toughed
glass, and by all acoounts this will have to be single glazing. So I
was wondering how to deal with [any] condensation.

dg

dg wrote:

Out in the sales (window shopping mostly) it occured to me that I have
never noticed any condensation on shop windows - or even signs of
ponding on the internal cills.

The few I looked at today did not have any heaters near the windows,
and doors were far enough away so as not to give much air circulation
to the some of the glazed areas.

It was on my mind, because I have been asked to look into designing a
'frameless' conservatory which will require large sheets of toughed
glass, and by all acoounts this will have to be single glazing. So I
was wondering how to deal with [any] condensation.

dg

Keep interior RH down, preferably by addressing any sources of excess
RH, or using a humidistatic dehumidifier.


NT

wrote:
dg wrote:

Out in the sales (window shopping mostly) it occured to me that I have
never noticed any condensation on shop windows - or even signs of
ponding on the internal cills.

The few I looked at today did not have any heaters near the windows,
and doors were far enough away so as not to give much air circulation
to the some of the glazed areas.

It was on my mind, because I have been asked to look into designing a
'frameless' conservatory which will require large sheets of toughed
glass, and by all acoounts this will have to be single glazing. So I
was wondering how to deal with [any] condensation.

dg

Keep interior RH down, preferably by addressing any sources of excess
RH, or using a humidistatic dehumidifier.


NT


I've got SG installed, and we do get a bit of condensation on the north
side in winter..heat and ventilation is all you can do to reduce it..but
also arrange for drain channels around the base.

I am surprised if you are ALLOWED to use SG..I only got away with it by
using small windows and doubling up on insulation elsewhere.


If it were me, I would still double it, but not using vacuum sealed
panes..just a gap and then put in silica gel. 2" of air in an almost
hermetically sealed gap, with some means of drying the air in between
will give a really good U factor.