Crown cracks from freeze-thaw cycles
Why it happens here
Franklin Hills sits high enough that winter freeze-thaw cycles hit harder than in the valley. Water sits in hairline crown cracks, freezes, expands, and opens them wider each season until the crown is leaking straight into the flue.
Our approach
We rebuild crowns with refractory cement and a proper overhang, then seal them with crown sealant. On newer crowns that are still sound, we clean and seal the surface to stop water before it starts the cycle.