A roof with a 2/12 pitch—often spoken or written colloquially with foot-and-inch notation as 2'12"—looks nearly flat to the naked eye. It rises two vertical inches for every twelve inches of horizontal run, translating to a very shallow angle of approximately 9.46 degrees. This low-profile incline is typical of modern industrial buildings, contemporary residential additions, or shed-style roofs. Because water drains extremely slowly from a 2/12 slope, it requires continuous waterproof membrane roofing materials rather than traditional overlapping shingles to prevent pooling and structural water damage.
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