1 To 2 Roof Slope

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.

1 to 2 roof slope.

Low pitched roofs are generally difficult to maintain and you need special materials to prevent leaks. The maths behind this number is that it is the square root of rise run 2 1. 0 pitch 1 00x the roof area. Since this is a flat roof or nearly flat roof.

Generally such roofs have a pitch ranging from 1 2 12 to 2 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. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

A 1 2 percent slope is used for applications that involve drainage of land and concrete such as patios and sidewalks. The term pitch and slope are often used interchangeably which is incorrect. The formula for calculating a 1 2 percent slope can be approached in at least two ways. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope.

A 12 to 24 pitch is expressed as 1 2. 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. Simply put it s a shallow roof. You can go by the measurements taken by walking the roof.

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12. 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. It also figures significantly in conservation farming irrigation where the land most vulnerable to rain erosion gets a 1 2 percent slope. 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.

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. Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope. The table below shows common roof pitches and the equivalent grade degrees and radians for each.

Roof pitch defined and explained. Most roof s have a pitch in the 4 12 to 9 12 range. Pitch is the term used to describe the angle slope or slant of your roof.