Typical Roof Pitch Angles

Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.

Typical roof pitch angles.

Roof pitch angle and slope factor charts. Roof pitch is a term describing how steep or flat your roof slope is. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. Divide the first part of the ratio by 12 to work out the pitch.

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. Roof pitch is expressed as a ratio of the amount of the roof s vertical rise over a corresponding horizontal distance called the run pitch is written assuming a run of a foot or 12 inches so the ratio describes how much the roof rises for every foot of its run. In other words it can be expressed as numerical measure of steepness of the roof. The high steeply pitched gabled roofs of northern europe are typical in regions of heavy snowfall.

This table lists all of the common roof slopes expressed as rise run roof angle roof slope slope grade and walk ability. In the roofing trade the go to term is pitch and it is expressed in terms of 12 inches so the pitch of a roof is determined by how many inches the slope rises for every 12 inches it runs horizontally. Pitch angle incline slope they all can be used to refer to the steepness of a roof. Buffalo new york and montreal quebec canada specify 6 in 12 a pitch of approximately 26 6 degrees.

The combination of two numbers are used to display or show the roof pitch. Some well defined standards are followed while deciding about roof pitch but in actuality the slope depends upon the type of roofing material and climatic conditions of the area. Find the inverse tangent of the pitch to find the angle in degrees. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed.

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. To convert between american roofing ratios and pitch degrees follow these steps. In some areas building codes require a minimum slope. Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials.

Citation needed carpenters frame rafters on an angle to pitch a roof. What degree angle is a 12 12 pitch roof. A 12 12 pitch roof has a pitch angle of 45. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.