Roof pitch or incline is the angle of the roof surface above the flat or horizontal plane.

The roof pitch prevents water from pooling on the surface of the roof, greatly reducing the risk of roof leaks.

**Formula to calculate roof pitch height.**

Since the rafter, the rise/height and the run of a roof form a triangle, we can use the Pythagorean theorem to find the roof pitch height provided your given the length of the rafter and the length of the run.

**Example:**

Suppose your given the length of the rafter as 10 feet and the run from the center of the roof to one of sides is 6 feet, calculate the roof pitch height.

Therefore, the roof pitch height is 8 feet.