kimball gray Posted February 8, 2012 Report Share Posted February 8, 2012 northeast oklahoma home built 1975. it appears that a vapor barrier was applied just below the plywood sub-flooring and on top of the floor joists. then foil backed bat insulation was put up inside the joist bays. It appears to me that the insulation on this large home was applied up side down. But, since there is already a vapor barrier under the flooring, does this make this application okay? Also, one area of black mold was detected along the rim. what kind is it? most of the crawlspace was dry. just a little dampness under ducting etc... Click to Enlarge 50.85 KB Click to Enlarge 46.32 KB Link to comment Share on other sites More sharing options...
kurt Posted February 8, 2012 Report Share Posted February 8, 2012 A vapor retarder "sandwich" can be as bad or worse than a vapor retarder installed backward. Other than that, it looks like a basic mildly moldy crawlspace. It doesn't matter "what kind" the mold is. Damp crawlspaces have mold. Figure out how to dry out the crawlspace, and install a vapor barrier on the floor. Link to comment Share on other sites More sharing options...
kimball gray Posted February 8, 2012 Author Report Share Posted February 8, 2012 That is what I was thinking. almost 8 thousand sq ft of replacing insulaiton and adding a floor barrier is going to be a bummer. but, it is what it is...thanks for the timely reply. Link to comment Share on other sites More sharing options...
Jim Katen Posted February 8, 2012 Report Share Posted February 8, 2012 The insulation is wrong. Are you sure that's mold, or is it some kind of dark sill sealer? Link to comment Share on other sites More sharing options...
kurt Posted February 8, 2012 Report Share Posted February 8, 2012 I thought the same thing.....it might be some sort of degrading sill sealer. But, I bet it's moldy regardless. Link to comment Share on other sites More sharing options...
John Kogel Posted February 8, 2012 Report Share Posted February 8, 2012 The insulation is wrong. Are you sure that's mold, or is it some kind of dark sill sealer? Besides the black line which could be sealer, that sill and those joists have a greyish tint that could be mould. No doubt there is work to do in that crawlspace. Link to comment Share on other sites More sharing options...
kimball gray Posted February 9, 2012 Author Report Share Posted February 9, 2012 It is definitely mold. It was also on the dirt floor of the crawlspace in the middle of spans where no sealer would be applied. Thanks again for all of your replies. Link to comment Share on other sites More sharing options...
Tom Raymond Posted February 9, 2012 Report Share Posted February 9, 2012 There are two positives though: The insulation is so poorly installed that it won't be too difficult to remove. And, the foil vapor barrier has so many holes in it that it isn't likely to have caused any significant damage. Link to comment Share on other sites More sharing options...
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