House Roof Pitch Angles

The angle or pitch of a roof is calculated by the number of inches it rises vertically for every 12 inches it extends horizontally.

House roof pitch angles.

Roof pitch is a term describing how steep or flat your roof slope is. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed. Typical roof pitch is actually the measure of the roof s slope expressed in ratio. The roof pitch calculator is a convenient online tool you can use to quickly assess the pitch of your roof to determine the length of rafters you need.

Roof pitch angle and slope factor charts. 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. In other words it can be expressed as numerical measure of steepness of the roof. This is the slope of geometry stairways and other construction disciplines or the trigonometric arctangent function of its decimal.

However most often a ratio of pitch also fraction is slang used for the more useful slope of rise over run of just one side half the span of a dual pitched roof. The pitch of a roof is its vertical rise over its horizontal span. The combination of two numbers are used to display or show the roof pitch. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.

The value displayed as the rise will be your x. Roof pitch calculator results explained. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. 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.

For example a roof that rises 6 inches for every 12 inches of horizontal run has a 6 in 12 pitch. After finding out your roof pitch angles you can use the calculator to perform the calculations for you instead of doing them manually. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. Pitch tan angle where angle is the roof pitch expressed in degrees.

Angle the angle of a roof is the same as the roof s slope except instead of being. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.