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2. Roof pitch - Wikipedia

   en.wikipedia.org/wiki/Roof_pitch

   Definitions vary on when a roof is considered pitched. In degrees, 10° (2 in 12 or 1 in 6) is considered by at least one reference a minimum. [5] In trigonometric expression, exact roof slope in degrees is given by the arctangent. For example: arctan(3 ⁄ 12) = 14.0°. Framing carpenters cut rafters on an angle to "pitch" a

3. Grade (slope) - Wikipedia

   en.wikipedia.org/wiki/Grade_(slope)

   But in practice the usual way to calculate slope is to measure the distance along the slope and the vertical rise, and calculate the horizontal run from that, in order to calculate the grade (100% × rise/run) or standard slope (rise/run). When the angle of inclination is small, using the slope length rather than the horizontal displacement (i ...

4. List of roof shapes - Wikipedia

   en.wikipedia.org/wiki/List_of_roof_shapes

   Bell-cast (sprocketed, flared): A roof with the shallow slope below the steeper slope at the eaves. Compare with bell roof. East Asian hip-and-gable roof; Mokoshi: A Japanese decorative pent roof; Pavilion roof : A low-pitched roof hipped equally on all sides and centered over a square or regular polygonal floor plan. [10]

5. List of commercially available roofing materials - Wikipedia

   en.wikipedia.org/wiki/List_of_commercially...

   Another advantage of copper roofing systems is that they are relatively easy to repair. Standing-seam metal roof with concealed fasteners. Mechanically seamed metal with concealed fasteners contains sealant in seams for use on very low sloped roofs, suitable for roofs of low pitch such as 0.5/12 to 3/12 pitch.

6. Domestic roof construction - Wikipedia

   en.wikipedia.org/wiki/Domestic_roof_construction

   Roofs are also designated as warm or cold roof depending on the way they are designed and built with regard to thermal building insulation and ventilation. The steepness or roof pitch of a sloped roof is determined primarily by the roof covering material and aesthetic design. Flat roofs actually slope up to approximately ten degrees to shed water.

7. Gambrel - Wikipedia

   en.wikipedia.org/wiki/Gambrel

   Gambrel roof A cross-sectional diagram of a mansard roof, which is a hipped gambrel roof A gambrel or gambrel roof is a usually symmetrical two-sided roof with two slopes on each side. The upper slope is positioned at a shallow angle, while the lower slope is steep.