I don't know if any foam was sprayed... my ignorance is exposed for not knowing why there would be problems with expanding foam...
The leaks come from the tracking - where the bottom window slides up and down... but only where the top window and the bottom one meet. Hard to explain... hey.. how about a picture!
The leaks are in the same places on both sides of the window... on any window being subject to wind.
The specs on these windows are: http://www.simonton.com/Products/_Produ ... i=215&pd=3
They have the same specs as windows 'reported' to having an R-50 rating! http://www.simonton.com/Products/_Produ ... i=226&pd=3
We have the ones with the argon gas... not sure which of the two options we have.