My First, Second, Third and Fourth failed Window Seal

[Mario A. Kyriacou, CHI]

Originally Posted by John Snell

Mario,
I'd be interested to know where you saw the condensation. These patterns are consistent with argon depletion of double glazed units; when that happens the condensation occurs on either the interior or exterior of the unit rather than between panes.

If anyone is interested, I have a paper I co-authored with my colleague, Rob Spring, on the topic. We found IR to be very useful at finding these before they were otherwise obvious and often before they went out of warranty. You may notice a deflection in the glass in larger units while smaller ones will often time spontaneously implode.

The next time you see this characteristic oval pattern in the center of the window, and if conditions are right for condensation, notice on which surface it has formed.

Hi John,

You are absolutely correct sir! 2 of the 4 windows did in fact have deflection; however, I did verify condensation between the two other window panes.

I would love to read your paper John!