Inspectorjoe Posted April 29, 2010 Report Share Posted April 29, 2010 This was in a 22 year old center unit townhouse. It had soffit vents but no upper vents. What I assumed was FRT plywood (couldn't find anything stamped on it) had a white powder matching the grain of the wood. It didn't appear at all on the adjacent flakeboard sheathing. I don't recall ever seeing this before. I'm guessing is powder is the chemical(s) that was used to treat it. Anybody know if this is a problem? Click to Enlarge 51.46 KB Click to Enlarge 57.89 KB Quote Link to comment Share on other sites More sharing options...
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