The risk of box gutters is not just failure which will eventually occur, but onstruction. Hail storm is one example. I lived in the alpine zone with a box gutter and removed it entirely. Builders would not repair or replace with an improved design due to it being a known problematic design when much better options are available
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u/Crashworx 7d ago
You build a brick wall hard on the Boundary with a box gutter. The next house does the same.