How do you calculate the total rise of a roof?

To calculate the total rise of a roof, it's important to understand the relationship between the roof's geometry and its measurements. The total rise refers to the vertical distance from the bottom of the roof to the peak, which is directly affected by the angle of the roof's pitch.

The total span of a roof is the horizontal distance between the eaves, or the points where the roof meets the walls on either side. The rise constant is a value that relates to the slope of the roof, often defined in terms of the ratio of rise to run.

When you multiply the total span by the rise constant, you are essentially applying the roofing formula that describes how changes in the horizontal distance (span) impact the vertical rise. This means that as you increase the total span of the roof, proportionally increasing the total rise in accordance with the rise constant accurately reflects this relationship, thereby providing the correct calculation of total rise.

In this scenario, using the total span multiplied by the rise constant gives you the total rise of the roof, thereby confirming the correctness of this approach for roofing calculations.