[mattbroekhuis]

I gutted mine out and put in spray foam before I moved in. Heat bill never tops 150. I realize that most people won't do this though.

You can get insulation put in without doing so. I think it's called retro foam. Also I'm guessing your attic insulation wasn't top notch?

[HeyLaughingBoy]

Within a month of buying the house I added insulation in the attic. Shudder to think how much higher the bills would have been if I didn't.