Darks Spots On the Outer Edge of Ceiling - Why?

Submitted By
chuck o
1 expert, 0 community

I have a 12-year old ranch style home, and have a question about the ceilings. In the last few years it's developed dark areas where the sheetrock was screwed to the trusses. This is only at the outer edge where the ceiling meets the wall.  I assume this has to do with the cold winters.  The ceiling is covered with a joint compound product with a random pattern.  Should I seal the spots and then paint? What do you suggest?  Thanks - I listen to you every Sunday morning!  Chuck

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