I hear a drip behind our stone fireplace wall. We went to the attic and see nothing. But cannot see in front of the fireplace because of the slope. Of the roof. No water stains or. Puddl s but sometimes I hear. What sounds like wet dry wall falling behind the wall. a. roofer has looked and found no loose shingles or holes. Twelve year old roof. There is a dent in the cover over the chimney. Ran water from a hose and it seems to be around the chimney and when water comes off the chimney cover and hits the flashing. Four people have looked and say to ignore it. I'm afraid of. More damage later. Would it be better to replace the chimney cover first before the $1000 flashing replacement or just ignore it. Also heard the drip the other morning when we had a lot of dew but. No rain. Trying to sell and in Ohio.

To determine where the problem is you have to start at the lowest point of the chimney where it comes through the roof. This would be at the flashing. Run water from hose for about 2 or 3 minutes at this location. If all is good, move up chimney about a foot and repeat. Do this until you reach top or it starts to leak.

This will localize the leak ,if you have one. From this point you can determine how to repair it.

Chuck

Here is a possibility to consider,

Leak Detection Equipment (http://www.leakdetection.com/equipment/)

You can at least call around and get a cost from companies that use this kind of equipment to see if it's worth it, or NOT. Have you tried to record this dripping sound?