JPickman said:
Hello, the guys I am working with to build my studio stated that I need to have my studio window vacuum sealed by a glass shop...they said that If I didn't the window would always be fogged up from the inside.....is this true....I have seen tons of stuff on here about windows but have never seen this mentioned...
This would appear to be nonsense.
"Sealed" double glazing units are not vacuum containers. A number of double glazing companies say that "your vacuum has gone" when the windows are a bit fogged. There is no vacuum there to "go".
If you put a vacuum between two huge plates of glass, they will collapse. What holds them apart? (hint, not the bit of metal round the edges!) Nothing.
In practice, double glazing units are assembled in a warm, dry atmosphere, filled with an inert gas, and then sealed. Not particularly pressurised or vacuumed.
When that seal goes, there is a natural, er, "exchange" of gas between the cavity, and the outside world. Moisture gets in, condensation is caused.
As you have no way to do this yourself, the next best thing is to capture the moisture, hence the use of silica gel to lock the moisture away.
