Understanding Roof Pitch

The term pitch and slope are often used interchangeably which is incorrect.

Understanding roof pitch.

Roof pitch is indicated by the measure of vertical ascent they ensure for each twelve creeps of horizontal estimation. Roof pitch is the rise of the roof over the run of the roof. The angle or pitch of a roof is calculated by the number of inches it rises vertically for every 12 inches it extends horizontally. 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.

A roof that ascents six inches each twelve level inches is depicted as a 6 and 12 roof. To calculate pitch you simply divide rise by span and display your result as a fraction. How to measure roof pitch. The rise is the height of the roof from the base to the top.

Mathematically the pitch of a roof is different calculation than roof slope. For example if a roof is 8 feet high and spreads out from the center covering 12 feet in each direction the rise over the run would be 8 12. Pitch compares the roof s span to the rise while slope compares rise and run. You ll often hear experts express pitch as x over y.

A 12 to 24 pitch is expressed as 1 2. For example a roof that rises 6 inches for every 12 inches of horizontal run has a 6 in 12 pitch. This implies a rooftop that is 4 inches higher than it was 12 creeps back assessing on a flat plane is a four and twelve rooftop. Simply put roof pitch is the measurement of the angle or the steepness of your roof.