Cracked chimney crowns after repeated freeze-thaw
Why it happens here
Prairie Park winters cycle above and below freezing dozens of times. Water sits on the crown, freezes, expands, and opens a crack. Once the crack is there, every rain sends water straight into the flue.
Our approach
We chip out the failed crown mix and rebuild the crown with a proper slope and overhang so water runs off instead of pooling. Then we seal it. A rebuilt crown here lasts decades, not seasons.