It depends on the R rating .

I lived in many places with zero insulation, that's really bad .

In New Hampshire we opened a wall and found crumpled news papers stuffed in for insulation .

Creating dead air spaces is how any insulation works .

Cellulose insulation, the termites love it .

__________________
-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better