The cavities will be filled with blown in cellulose which is mixed w/ boric acid. No air can travel, so no chimney effect, also Boric acid is a fire retardent if my third grade science teacher was not lying.

Today I spent padding the studs out an additional 4". the orignal studs were mostly 3x4, some 2x4. some 2 3/4 x 4 etc. The new wall will be 8" (my wife will finally get her wish ;) albeit corrupted) I better be frigging roasting this winter. From no insulation to 8" and new insulated windows.

The garden is pretty much drifting aimlessly...

Also I am doing all this when I am not at work. I am a tuckered out dude. It is a struggle not to fall asleep when the inchling wants to play trucks. This week he has watched more videos (sesame street, elmo) than in his entire life to date.

That is only about five or six, but still.

Maybe I'll go to bed now.

The weather has been kind of nasty this past couple weeks, too. I don't envy you one bit. :headshake

Dang. I am impressed.
What part of the world are ye?
Do you have a "before" shot of the property?