1 To 2 Roof Slope

Generally such roofs have a pitch ranging from 1 2 12 to 2 12.

1 to 2 roof slope.

A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. A 12 to 24 pitch is expressed as 1 2. 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. The term pitch and slope are often used interchangeably which is incorrect.

A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. For example given a roof with a rise of 4 feet and a span of 24 feet the pitch is 1 to 6 pitch which can be expressed as the fraction of 1 6. 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. A 1 2 percent slope is used for applications that involve drainage of land and concrete such as patios and sidewalks.

Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope. The maths behind this number is that it is the square root of rise run 2 1. Roof pitch defined and explained. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

Roof pitch designations are comprised of two numbers indicating a ratio. This means for every 12 horizontal units the roof must rise a minimum of one half vertical unit. Since this is a flat roof or nearly flat roof. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Pitch is the term used to describe the angle slope or slant of your roof. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope. You can go by the measurements taken by walking the roof. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

0 pitch 1 00x the roof area. Simply put it s a shallow roof. It also figures significantly in conservation farming irrigation where the land most vulnerable to rain erosion gets a 1 2 percent slope. 1 pitch 1 01 2 pitch 1 02 3 pitch 1 03 4 pitch 1 05 5 pitch 1 085 6 pitch 1 12 7 pitch 1 16 8 pitch 1 21 9 pitch 1 25 10 pitch 1 31 11 pitch 1 36 12 pitch 1 42.

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. Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks. The formula for calculating a 1 2 percent slope can be approached in at least two ways.