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My new New Hampshire construction has R29 fiberglass stapled into the second floor ceiling. The third floor, is framed and is vented through the soffits and ridge vents but will only be used for storage. Would it be worth my time and money to insulate the third floor ceiling and put in the foam pieces that keep air going directly going from the vents to the soffits? I would do it to help prevent heat loss from the second floors. Or should I just leave it be and count on the R29 in the second floor ceiling to the work? I will be using the third floor just for storage. Thanks for any advice.
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Wouldn't be worth it, in my opinion.
*John,Pick one plane to be the thermal boundary and concentrate on that. Either bring the attic into the thermal envelope or don't. If it's in, then the attic floor insulation is redundant. Plus the vent chutes would need to be better sealed off from the attic space than just with poly chutes, or the insulation in the attic ceiling (rafters?) will be pretty ineffectual.Steve
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My new New Hampshire construction has R29 fiberglass stapled into the second floor ceiling. The third floor, is framed and is vented through the soffits and ridge vents but will only be used for storage. Would it be worth my time and money to insulate the third floor ceiling and put in the foam pieces that keep air going directly going from the vents to the soffits? I would do it to help prevent heat loss from the second floors. Or should I just leave it be and count on the R29 in the second floor ceiling to the work? I will be using the third floor just for storage. Thanks for any advice.