[masraum]

Hmm, interesting. Is your house a 1 story or 2? If it's a 1story, and you're in central FL (lots of sun), my guess would be Attic. Do you have ridge vents or the old fashioned kind? My attic gets REALLY hot, and I know causes a big part of my cooling bill in the summer.

How big are your windows, that would make a difference. 11 huge windows vs a few big and a few small, would change the assessment.

My house has also got 11 windows. 6 are probably around 2.5' x 5', and the other 5 are small bathroom/kitchen style windows. I know that they are VERY inefficient. I'm sure they are the windows that the house was built with in '67. We'd like to replace the windows and get insulation. I'd like to do the foam, but we don't plan to be in the house long enough to spend that much. I think we're going to get the attic insulation beefed up. I'm going to buy/build some sort of insulation for the attic door too.

I'm far from an expert, so take what I've said with several grains of salt.