a roof rises 1.1 feet vertically and 13.6ft horizontally what is the grade of the roof.

To find the grade of a roof, you need to divide the vertical rise by the horizontal run and then multiply by 100 to get the percentage. In this case, the vertical rise is 1.1 feet and the horizontal run is 13.6 feet.

Grade = (Vertical Rise / Horizontal Run) * 100

Plugging in the values:

Grade = (1.1 / 13.6) * 100

Now we can calculate it:

Grade = (0.0809) * 100

Grade ≈ 8.09%

The grade of the roof is approximately 8.09%.