ToddW,

Insulation is a major issue, and I'm aware of it.

Before we moved in, this house was primarily used as a summer beach house, and was rarely occupied when it got cold out. I've managed to seal up most of the leaks where you could actually feel the wind blowing through the house, but there are still cold spots I need to deal with. One major cold spot leads me to believe there's a leak behind the kitchen cabinets, which I am not looking forward to dealing with.

Thanks for the tip. I was pretty amazed by how fast it was getting cold inside.