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).
<= 4 feet
> 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()
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