The standard windows that VM put in are garbage. I can't wait for a reason to replace them. Our upstairs gets super hot as well during the summer even though we have an attic fan and a programmable thermostat. When it hits 80 or above, I keep all the front windows closed during the day; we have blackout shades in 2 rooms and those stay the coolest. One day when the kids are out of daycare we'll have some $ to upgrade the ductwork which I'm sure is just like the windows - garbage. Good luck this summer!