1 To 2 Roof Slope

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

1 to 2 roof slope.

The term pitch and slope are often used interchangeably which is incorrect. The table below shows common roof pitches and the equivalent grade degrees and radians for each. A 1 2 percent slope is used for applications that involve drainage of land and concrete such as patios and sidewalks. 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. The maths behind this number is that it is the square root of rise run 2 1. 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. 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.

You can go by the measurements taken by walking the roof. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. Most roof s have a pitch in the 4 12 to 9 12 range. The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

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. Roof pitch designations are comprised of two numbers indicating a ratio. 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. Pitch is the term used to describe the angle slope or slant of your roof.

0 pitch 1 00x the roof area. Roof pitch defined and explained. Since this is a flat roof or nearly flat roof. Or the colon can replace the slash as in 2 12 or 7 12.

The formula for calculating a 1 2 percent slope can be approached in at least two ways. Generally such roofs have a pitch ranging from 1 2 12 to 2 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. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

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. Standing seam roof systems must have a minimum roof slope of 1 4 12 2 slope.