hey Rusty,
haven't done anything with the walls yet, but I'm sure once the cavities are full of cellulose, covered with earthen plaster and sided on the outside, the problem will go away.
Went through an energy audit a couple of weeks ago, but due to large gaps on one of the walls (one which is getting direct glazed this year) the guy didn't run the blow test. The good news is that the ON gov is paying 100% of our insulation investment grin
Once the glazing is done, and the house is detailed, we'll run the test and see where we're @ in order to design a properly sized HVAC system.

there's a thin line between hobby and mental illness