interNACHI How to Perform Roof Inspections | 113 Questions with 100% Correct Answers | Updated & Verified

Define Slope - incline of the roof as a ratio of vertical rise to horizontal run . . . . where the run is some portion of the span. Always expressed as inches per foot. (1 in 12, 1:12 is the ratio) A triangle above the roofline in an architechtural plan provides information on the ______ ______. - roof's slope Define Pitch - incline of the roof as a fraction derived by dividing the rise by the span, where the roof span is the distance between the outside of one wall's top plate to another. Define Pitch Fraction - The pitch fraction (different from slope) represents a certain amount of vertical rise over the entire span. A roof that rises 8 feet over a 24-foot span was said to have a "1 to 3" pitch. If the rise is 4 feet over a 24-foot span, then the roof pitch was said to be "1 to 6." Gable roofs have two slopes and the ridge extends the length of the home.