Thread: Insulation
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Old 11-20-17, 02:44 PM   #6
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Originally Posted by Daox View Post
My vote is for cellulose. I like how it performs better the colder it gets vs fiberglass working worse the colder it gets.
You forget about or don't know how bulk insulation works. It's sole purpose is to prevent air movement in the insulated space thus eliminating convection heat loss. All bulk insulation materials have a higher heat conductivity than does air but this small additional conductive heat loss is more than offset by the elimination of convective heat loss in still air. Thus, bulk insulation in a sealed volume is only effective in reducing heat loss on a horizontal or upward direction, not in a downward direction, inasmuch as natural convection does not
exist with downward heat flow.
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