Cracked chimney crowns leaking into the flue
Why it happens here
Freeze-thaw cycles here crack the crown surface, and once water gets in, it expands overnight and widens the crack. Most Stillwells Corner crowns fail within 20 to 30 years.
Our approach
We chip out the failed crown, rebuild the slope with chimney crown mix, and create a proper bond break at the flue so movement does not re-crack it. Then we seal it.