Cracked crown letting water into the flue
Why it happens here
Most crowns in Ashland are original to the house, poured decades ago with a thin mix and no overhang. Freeze-thaw cycles crack them, and once cracked, every rain sends water down the inside of the chimney. It is the number one leak source we find here.
Our approach
We rebuild the crown with a proper mix and a real overhang so water sheds off the top instead of running down the flue. We seal it and check the cap at the same time, since a bad cap makes a crown problem worse.