Mold or rust stain on roof truss
Home Improvement Asked by dstmartin on May 16, 2021
Paid a visit to my attic earlier today to see if there was any winter damage. Looking all good except for a small piece of truss that has a black stain on it (see picture). I would have said mold but the symmetry of the stain is odd. Could this be a rust stain or something else that was already present when roof was built? If you look at roof sheathing nearby and cardboard piece preventing blow-in insulation from reaching soffit, it does not look like there was water infiltration anywhere nearby.
Looking for any input that you guys may provide.
One Answer
Neither. It's labeling paint. It was either sprayed onto the entire lumber unit or this truss set for identification.
Correct answer by isherwood on May 16, 2021
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