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black spots on insulation


groundhog74's Avatar
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Join Date: Nov 2009
Posts: 2

11-04-09, 11:28 AM   #1  
black spots on insulation

We have an unfinished walk-out basement. The back wall has insulation covered by clear plastic. I have noticed some black spots on the insulation. Would that be mold or something else? The basement doesn't have any leaking, but I'm not sure what the humidity level is. Thanks!

Al

 
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GBR in WA's Avatar
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Join Date: Mar 2009
Posts: 1,167
WA

11-04-09, 04:11 PM   #2  
Mold: http://www.buildingscienceseminars.c...w&Retrofit.pdf
Be safe, Gary

 
groundhog74's Avatar
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Join Date: Nov 2009
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11-04-09, 04:31 PM   #3  
Thanks. So what do we do after we remove all of the plastic and insulation? Only one wall has insulation, the one that faces the back of the house and isn't underground. On the outside that wall has vinyl siding.

 
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