Originally Posted By: HeidiKM
This post was automatically imported from our archived forum.
I’m writing about a mysterious condition on the interior walls of a split level house outside Chicago.
On the inward-facing surfaces of nearly every wall which surrounds the central staircase, there is significant evidence of seepage (looks like a jagged water line that extends about two feet from the ceiling) coming down from the top. The bottom edge of some of these areas are "tacky" -- not wet, but slightly sticky, like whatever is making its way through the wall has an oily or sticky component.
There is no staining on the ceiling, nor is there any staining on the reverse sides of the walls in question (those that face away from the staircase into the rooms that surround it.)
There is no evidence in the overhead crawlspace of water infiltration from the roof and no a/c or plumbing lines that would give off condensation. The only equipment above the ceiling is an old whole-house fan, which (a) has not been used in at least two years and (b) is not central to the affected area.
Any ideas at all about what might be causing this?? Any suggestions would be very welcome and greatly appreciated.