Why does Pilkington 'E' Glass D/Glazed units, condense on the outside?

Question

I know they are coated on one surface with a reflective film, but which surface, and which pane in a sealed unit.

Interested, out of self interest !.

Answer 1

If you count the fact that face 1 of the unit is the room facing side of the inside pane, and face 4 is the external side of the outside pane the reflective film is on face 3 of the unit (inside face of outside pane) which then reflects the heat back in to the room and allows the condensation to form on the outside of the unit.

Answer 2

You will find this on most good double glazing units - its due to air temperature - the internal v.the external. We all know there is moisture in the air which when cooled, returns back to the form of water droplets. What you are seeing is the results of physics - the warm atmosphere inside the room transfers some of the heat the internal space between the glass panes - the external air, which is cooler touches the external glass, which is warmer on the inside and cooler on the outside and hey presto - water droplets - aka condensation.
I wouldn't worry about but marvel at the wonder of nature - unless it's inside the units - then you need to have the units checked and resealed.

Answer 3

I was having Pilkington K glass maybe it’s the same as E glass fitted a few years ago. I had so much trouble with the workmanship that I decided to ring Pilkington up to see if there was a right or wrong way to install this glass, they said there was and told me how I could tell. I waited for my workmen to arrive with the glass, which was a very large pain only to have them install it the wrong way round. They did take it out and put it in correctly but it was me that had to tell them which way it went they did not think it mattered. I wonder how many more people have glass installed the wrong way and don't know.

Answer 4

Presume you mean condensation on the outdoors of the interior pane ( it is nice to wipe off) not extremely between the panes. if so, then boost somewhat the room temperature - the condensation is heat moist air cooling down while it hits the chilly glass and changing lower back to water - as warmer air holds extra water in the previous it condensates. additionally pay interest to materials of moisture - cooking, bathing, oil/ paraffin radiators etc and save doorways close and the room ventilated

Answer 5

glass

Answer 6

See my answer to a similar question a few days ago.

http://uk.answers.yahoo.com/question/index?qid=20061004032430AA6WNUC&r=w&pa=AptqD2bwHTHf6OGEYKU_vl_n3x32fXZnEQFuXw.lwqTvQa_J4ldl9T2EzdhT27NDA8sPrG1yz0WIfg--