Home>Discussions>INSULATION & HVAC>Loose cellulose insulation in attic. Need to remove before finishing attic?
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Jeffrey
Loose cellulose insulation in attic. Need to remove before finishing attic?
Jeffrey

We have a thick layer loose cellulose fiber insulation in our attic (c. 1880 home, n. of Boston). Now considering finishing the attic, and wondering what that means for the insulation. Would/should it come out prior to laying a floor? There are the efficiency issues of the attic being an isolated zone for heating/cooling purposes if both attic floor and ceiling are insulated. But I'm worried about moisture, condensation, etc. if that cellulose is trapped in there. No vapor barrier. Thoughts or options? Thanks!

If the answer is definitely yes to remove, ideas for that terrible job? That's a lot of loose insulation.

ordjen
Re: Loose cellulose insulation in attic. Need to remove before finishing attic?
ordjen

If both areas are now to be within the conditioned air house envelope, the presence of the cellulose insulation should not be important. With similar temps and moisture in both areas, moisture and heat transfer are negligible. Depending how the areas are to be used, the cellulose might contribute desired sound insulation.

dj1
Re: Loose cellulose insulation in attic. Need to remove before finishing attic?
dj1

If "finishing the attic" means insulating the rafters, then don't worry about the insulation between the joists.

When insulating between the rafters, you should install baffles first, to allow for an air flow between the roof deck and the insulation.

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