Share 'Concerns about drill-and-fill cellulose insulation in walls without a vapor barrier'
So my Crew Chief asks me the other day about installing dense pack cellulose insulation into walls lacking a vapor barrier. The majority of the homes we are serving are in the Berkeley/San Francisco Bay area and are vintage (1920's, 1930's and 1940's) with wood exteriors and no vapor barrier between the studs and the siding. We are concerned about long-term moisture issues. Any thoughts?
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