2 Slope Roof

Arctan 3 12 14 0 the primary purpose of pitching a roof is to redirect water and snow.

2 slope roof.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Photography by marc lamkin. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks. An element of the second empire architectural style mansard style in the u s.

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. 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. 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. Thus pitch is typically greater in areas of high rain or snowfall.

The maths behind this number is that it is the square root of rise run 2 1. A roof with the pitch divided into a shallow slope above a steeper slope. The steep slope may be curved. Definitions vary on when a roof is considered pitched.

A roof similar to a mansard but sloped in one direction rather than both. This means for every 12 horizontal units the roof must rise a minimum of one fourth vertical unit. 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. Generally such roofs have a pitch ranging from 1 2 12 to 2 12.

The exact roof slope in degrees is given by the arctangent. Simply put it s a shallow roof. Coal tar built up roofs however can have a design roof slope of 1 8 12 1 percent but no less. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance.

Residential low slope roofing can generally be divided up into two broad categories. Finding the right products for your low slope roof. Holly smith architects designed this louisiana home. 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.

These roofs have a pitch less than 4 12.