1 To 2 Roof Slope

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

1 to 2 roof slope. The table below shows common roof pitches and the equivalent grade degrees and radians for each. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. This means for every 12 horizontal units the roof must rise a minimum of one half vertical unit. 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.

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. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope. Since this is a flat roof or nearly flat roof. Or the colon can replace the slash as in 2 12 or 7 12.

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. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. 0 pitch 1 00x the roof area. Pitch is the term used to describe the angle slope or slant of your roof.

The formula for calculating a 1 2 percent slope can be approached in at least two ways. Roof pitch defined and explained. These roofs have a pitch less than 4 12. 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.

It also figures significantly in conservation farming irrigation where the land most vulnerable to rain erosion gets a 1 2 percent slope. The maths behind this number is that it is the square root of rise run 2 1. A 1 2 percent slope is used for applications that involve drainage of land and concrete such as patios and sidewalks. You can go by the measurements taken by walking the roof.

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 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Simply put it s a shallow roof. Most roof s have a pitch in the 4 12 to 9 12 range.

Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope. Roof pitch designations are comprised of two numbers indicating a ratio. A 12 to 24 pitch is expressed as 1 2.