I have a 3 year old home with Simonton Pro Finish windows. I am up here in Wisconsin where the cold and the wind can be pretty harsh. Let me tell you the windows are just not performing.
The air infiltration is so bad the curtains move with a 20 MPH wind. I have to install window insulating kits on my windows that face the west. The bulge of the plastic insulating kit sticks a good 3 to 4 inches into my living room.
Simonton reps have been out and said "The windows are performing within or exceeding mfg. specs.?"
They made this conclusion without any testing equpt. Then proceeded to insert foam squares down the side tracks of the windows. I was told this was to stop some of the infiltration?
Needles to say I have a complaint into the BBB and I have contacted the AAMA (these windows are AAMA and Energy Star certified)
At this point, until Simonton proves that it may be a possible install problem....
I would not recommend Simonton Pro Finish windows!!!!