Million dollar question. What constitutes a failed seal? Under normal anywhere but Florida conditions, like in the cold parts of the country, I know.
But here, we moved into new construction last October. I have 2 sets of tri-windows. Both on back of the house facing north.
In both those tri-sets, the middle & outside windows often get what appears to be condensation covering all but a 1-1/2” parameter around the outer edge. The moisture is not on the inside the house side. It appears to be on the outside, not between the glass. As little frogs can leave their trail across the glass.
This seems to happen on the cooler mornings. My running the A/C, as I did last night seems to not be the culprit. This mornings humidity is 84%, temperature is 73.
Not sure what the outside temps are when this happens, but up to now it’s been much cooler overnight.
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