My Bungalow fogs up outside

Good Morning all, This morning all of my windows in my bungalow were fogged up on the outside, this has happened many times in the past at this time of year. The conservatory which had no heating on so similar temperatures to the outside was the same, my neighbors bungalows I noticed are not fogged up, I don't have the heating on at night as we don't like being to hot at night, but the temperatures in the morning when I got up was just below 15deg c, if the inside temperature of the bungalow was the same as my conservatory I could understand this, any idea why this happens.

Thanks Bob

Your conservatory had time to get cold by radiation into the night sky before the warm front moved in so it was able to condense the water vapour. My oen porch is the same under these conditions. Also affected by the time at which you turned off the heating in the conservatory if you were so irresponsible vis-a-vis global warming to actually turn it on in there at this time of year. Heating conservatories should be illegal by now, far more wasteful even than petrol cars.

Condensation in the presence of a damp warm front and change in temperature will have made hundreds of garages and equivalent unsealed barns etc damp. This illustrates the problem for people who think it is clever to have vents in their workshop to "let the cold air out". Rubbish. It let the damp air in, Always strive to make your workshop airtight so the condensation stays on the outside of the walls and windows.

End house? leeward/windward side?

Your windows are colder than the outside temp... they got cold overnight and the warmer morning air condensed on them?

Better quality double glazing?

Edited By Ady1 on 15/12/2020 08:54:48

If the conservatory is modern, do you have modern self cleaning glass - if so, it is prone to fogging as you experience.

You probably have the more modern glass with the infra-red filter.

Mine do it too.

We had new windows a year or two back. Previously had wood frames with probably 20 year old sealed DG units, would get condensation on the inside on very cold nights. New windows are modern aluminium with thermal break inside and modern wide gap glazed units. Since then we almost never get internal fogging on the woindows but regularly get condensation on the outside in cold weather.

Don't overlook that insulation works both ways, so will slow the morning temperature rise inside, as the air warms up outside. I found this when I put a new insulated door on my workshop, which slows up the rise in internal air temperature as the sun comes up. Of course it also slows the temperature drop in the evening.

House I lived in in Dublin was of a simple kind, the temp inside and outside was always the same, FREEZING !

One never had to go outside to check the weather, it came in to you ! An early form of Air Conditioning, I suppose !

We had new DG windows last year and also experienced this phenomenon, I put it down to more efficient heat retention than the old ones making the outside glass colder.

Bill D.