The slope of a roof has a number of implications include the risk for roofers.
Low-slope roof means a roof having a slope less than or equal to 4 in 12 (vertical to horizontal).
Steep roof means a roof having a slope greater than 4 in 12 (vertical to horizontal).
|
Slope
|
horizontal
|
vertical
|
outside angle
|
|
low-slope
|
12 feet
|
<= 4 feet
|
<=18.44 degrees
|
|
steep
|
12
|
> 4 feet
|
> 18.44 degrees
|
The angle can be calculated using the arctan (ATAN in Excel) function.
angle in degrees =
= ATAN ((vertical) / (horizontal)) * 180/PI()
