4 12 Roof Slope Angle

Roofs require slope for adequate drainage and even so called flat roofs must have some incline.

4 12 roof slope angle. Check out our roof angle chart for more examples of the exact angles expressed in degrees of common roof pitches. A 4 12 roof pitch indicates the roof rises 4 inches in height for every 12 inches as measured. 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. Roofs with a pitch of 4 12 are approximately 18 4 degrees depending on how exact you d like to be in your measurement.

A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible. Roof pitch slope roof angle degree 1 12 pitch 4 76 2 12 pitch 9 46 3 12 pitch 14 04 4 12 pitch 18 43 5 12 pitch 22 62 6 12 pitch 26 57 7 12 pitch 30 26 8 12 pitch 33 69 9 12 pitch 36 87 10 12 pitch 39 81 11 12 pitch. The slope of the roof provides the rise and the run to be plugged into the equation. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

The table below shows. Most roof s have a pitch in the 4 12 to 9 12 range. You can also divide the rise over run multiply by 100 and get a. The roof pitch factor is also used to calculate the length of common rafters.

This table lists all of the common roof slopes expressed as rise run roof angle roof slope slope grade and walk ability. 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. A 4 12 roof pitch is referred to as the roof rises 4 inches in height for every 12 inches as it measured horizontally from the edge of the roof to the centerline. This article series gives clear examples just about every possible way to figure out any or all roof dimensions and measurements expressing the roof area width length slope rise run and unit rise in inches per foot.

The gentle slope of a 4 12 roof pitch falls on the cusp between moderate. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. A roof pitch of 4 in 12 4 12 has a rise of 4 and a run of 12.