3 12 Roof Slope

The ratio can be indicated by a division slash separating the numbers such as 2 12 or 7 12.

3 12 roof slope. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. However from the wind uplift mitigation perspective a 7 12 roof slope can be considered as a two story building due to the higher overall steepness and profile of the roof. Roof pitch defined and explained. 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.

To express a slope of 1 3 as a roof pitch you would multiply by 4 4 to produce 12 in the denominator of the ratio. For example a 3 pitch or 3 in 12 pitch or 3 12 pitch all mean that the roof rises 3 inches for every 12 inches of it s horizontal run. Roof pitch designations are comprised of two numbers indicating a ratio. Roof pitch is a term describing how steep or flat your roof slope is.

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. It is the most common way in us and canada to describe a roof s basic quality slope or steepness. A roof slope of 7 12 is also good and can provide the additional benefit of helping minimize the effects of wind driven rain.

Roof pitch is represented in inches rise of 12 inches run. Roofers like to express the roof pitch ratio in inches and for simplicity they always use a run of 12 inches. The fraction 4 4 equals 1 so it doesn t change the value of the pitch and it produces a pitch of 4 12. If a roof rises 3 in a length of 12 this is 3 12 roof pitch.

Or the colon can replace the slash as in 2 12 or 7 12. Lapped nonsoldered seam metal roofs without applied lap sealant must have a minimum roof slope of 3 12 25 slope. 3 12 roof pitch angle 14 04 degrees. Lapped nonsoldered seam metal roofs with applied lap sealant must have a minimum roof slope of 1 2 12 4 slope.

The combination of two numbers are used to display or show the roof pitch. The minimum roof pitch for shedding snow is around 30 or a 6 12 or 7 12 slope although this is not a definite as the material of your roof the direction of the snow and wind are some factors that can affect whether or not snow will slide as roofs of as little as 10 have been reported to shed snow.