mjr6550 Posted January 26, 2015 Report Share Posted January 26, 2015 I saw these stains at several areas in an attic. They are not from condensation. No apparent odor to them and I was not in the mood to taste them. I'm thinking it is asphalt or something leaching out of the moisture barrier on the insulation. I think I have seen this in the past, but not often. Any thoughts? Click to Enlarge 30.1 KB Click to Enlarge 36.69 KB Quote Link to comment Share on other sites More sharing options...
John Kogel Posted January 27, 2015 Report Share Posted January 27, 2015 I think black gunk from a caulking gun. He glued the batts to the rafters. Quote Link to comment Share on other sites More sharing options...
Marc Posted January 27, 2015 Report Share Posted January 27, 2015 I saw these stains at several areas in an attic. They are not from condensation. No apparent odor to them and I was not in the mood to taste them. I'm thinking it is asphalt or something leaching out of the moisture barrier on the insulation. I think I have seen this in the past, but not often. Any thoughts? Click to Enlarge 30.1 KB Click to Enlarge 36.69 KB Looks like you've hit the nail on the head. Marc Quote Link to comment Share on other sites More sharing options...
Rob Amaral Posted January 27, 2015 Report Share Posted January 27, 2015 Looks like classic ice-dam leaks guys.. tannin-colored stains.. Eaves, etc.. Quote Link to comment Share on other sites More sharing options...
Erby Posted January 28, 2015 Report Share Posted January 28, 2015 Click to Enlarge 36.69 KB I'd bet the line in this pic is directly under a valley. Quote Link to comment Share on other sites More sharing options...
Eric B Posted January 29, 2015 Report Share Posted January 29, 2015 That photo appears to be looking up at the base of a vaulted ceiling. In my experience is usually associated with a ventilation problem (condensation). Quote Link to comment Share on other sites More sharing options...
Rob Amaral Posted February 1, 2015 Report Share Posted February 1, 2015 Click to Enlarge 22.06 KB Tannin-stains in snow yesterday.. Concord, MA.. classic ice-dam above... Quote Link to comment Share on other sites More sharing options...
mjr6550 Posted February 2, 2015 Author Report Share Posted February 2, 2015 leakage from ice damming could be a possibility, but the stains were much darker than usual. No signs of condensation-the sheathing was not discolored. Quote Link to comment Share on other sites More sharing options...
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