2 Slope Roof

Definitions vary on when a roof is considered pitched.

2 slope roof.

Residential low slope roofing can generally be divided up into two broad categories. A roof similar to a mansard but sloped in one direction rather than both. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7. Larger flat roofed applications low slope such as residential condominium complexes row homes and town houses and smaller applications such as residential porch and garage transitions from the main home where the slope of the roof changes dramatically.

A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Thus pitch is typically greater in areas of high rain or snowfall. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Simply put it s a shallow roof.

A roof with the pitch divided into a shallow slope above a steeper slope. A roof pitch multiplier also known as a roof pitch factor is a number that when multiplied by the area covered by a sloped roof gives the actual area of the roof. Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow. The steep slope may be curved.

The maths behind this number is that it is the square root of rise run 2 1. In degrees 10 2 in 12 or 1 in 6 is considered a minimum. Generally such roofs have a pitch ranging from 1 2 12 to 2 12. An element of the second empire architectural style mansard style in the u s.

These roofs have a pitch less than 4 12. The slope of the roof on this modern pond side house allows the solar panels to take in as much energy as possible and lets rain water fall back into the pond to help with drainage around the house. The exact roof slope in degrees is given by the arctangent. That means the roof doesn t shed water as easily as steeper roofs which is why choosing the right type of roofing material is so important.

Coal tar built up roofs however can have a design roof slope of 1 8 12 1 percent but no less. Built up roofs must have a design roof slope of 1 4 12 or greater 2 slope. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks. Conventional roofs are the easiest to construct and you can walk on them safely.

This means for every 12 horizontal units the roof must rise a minimum of one fourth vertical unit.