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high indoor humidity in summer after replacing attic fiberglass batts with celluose insulation
Location: New Jersey
Month of year: May-June
Outside Humidity levels: 70-90%
Outside temps: 80-90 F
Inside Humidity levels: 59-69% (AC on)
Inside temp : 71 (AC on)
I recently replaced all my ALL of my attic fiberglass batt insulation with blow in cellulose. Since the completion of the job I am noticing that the indoor relative humidity levels in the house are around 10% higher than they were with the fiberglass batt insulation. I am thinking this is happening because the class 2 vapor retarder (batt insulation kraft paper) is no longer there to slow down the diffusion from the attic. Do you folks agree? If so, should I paint the ceilings of the house with a vapor retarder paint (permeability=0.6) that Glidden and sherwin williams are selling? Or should I add another 2 coats of regular latex ceiling paint to the already painted ceilings? Right now I am running 2 extra dehumidifiers in the house in addition to the AC to keep the humidity levels in 52-57% range but they are very noisy and spit out hot air back in the house..