H A wrote:snip-Any ideas on where/how to look for this leak? I'm told
that the "wet seal" product really doesn't work very well when
applied in the cold and wet. Also considering the leak seems to have
been
slowed up, I think we're on the right track...but how do you know?

The type
of "roofer" who slapped a bucket of tar on your roof afforded me a nice
living for awhile! Shingles, 7 years old, I'm going with "bath fan
flashing should be redone or replaced". Tom