Jerry Simon Posted November 15, 2014 Report Posted November 15, 2014 Any opinion on this black splotching on the underside of the OSB sheathing in an attic? Click to Enlarge 49.56 KB
Jim Katen Posted November 15, 2014 Report Posted November 15, 2014 Looks like paint or ink spatter from the process that stamps the grade marks on the wood.
Mark P Posted November 15, 2014 Report Posted November 15, 2014 I agree, it came from the factory like that.
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