A roof with a 10/12 pitch—often written colloquially using foot-and-inch notation as 10'12"—is a very steep, dramatic residential slope. It rises ten vertical inches for every twelve inches of horizontal run, translating to an angle of roughly 39.8 degrees above the horizontal plane. This steep pitch is commonly seen in Victorian, Gothic, or steep-gabled architectural styles, allowing rainwater and heavy winter snowpacks to slide off rapidly. However, working on a 10/12 roof requires specialized safety harnesses, roof jacks, and scaffolding due to the severe fall hazard.
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