Searching for the Leak

Searching for the Leak

Removal of a stone confirmed that through-wall flashing had not been installed.

Searching for the Leak

The roof counterflashing was inserted into the face of the stone about 1/2 inch.

Searching for the Leak

A continuous bead of sealant at the saw-cut-in flashing (red arrow) may have helped keep bulk water outside during lighter rain events, but when it rained long and hard enough, water draining down behind the stone veneer would simply run down past the roof and into the ceiling below.

Searching for the Leak

The existing mortar had been mixed up dry on site and so was very loose and porous. The stone had been laid up without an air space, which was code-legal for a brief while in the vicinity where the author works. Though it was common practice, it was not ideal from a water-management perspective.

Searching for the Leak

Installing proper through-wall flashing entailed having to remove the granitic stone veneer.

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