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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.

enter image description here

Chris Cudmore
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dstmartin
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  • what is winter damage? – DMoore Apr 29 '21 at 15:29
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    I meant..leaks due to damaged shingles or ice dams. Maybe even condensation cause by roof vents blocked by heavy snow. Winters in Canada get nasty. – dstmartin Apr 29 '21 at 15:36
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    I think that is paint on the lumber, but if is that corrugated cardboard under it in the photo, I would get rid of that, as it can mold. Hard to tell phone the photo exactly what it is and why it appears to be stapled to the lumber, – End Anti-Semitic Hate Apr 30 '21 at 01:41
  • (How in the world did I type "phone" when I meant "from" in the above comment? Mods, feel free to correct my comment!) – End Anti-Semitic Hate Apr 30 '21 at 06:42

1 Answers1

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Neither. It's labeling paint. It was either sprayed onto the entire lumber unit or this truss set for identification.

enter image description here source

isherwood
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