text: Flat roofs – 1% to 2% slope
  Low slope-3:12 to 5:12
  Medium Slope-6:12 to 9:12
  High Slope-10:12 to 12:12
  ;Subtropical regions in the US where SCV roofs could apply
  Here are some of the states where humid subtropical climates can be found:
  * Eastern half of Texas
  * Louisiana
  * Arkansas
  * Alabama
  * Mississippi
  * North Carolina
  * South Carolina
  * Tennessee
  * Georgia
  * Kentucky
  * most of Florida
  * Virginia
  * southern West Virginia
  The climate in many of these states can vary and be extreme.
  Benefits (Performance ratings)
  * Reduces stormwater volume (50%–85%)
  * Improves stormwater quality through load reduction
  * Saves water by rainwater harvesting
  * Reduces heat island effect
  * Lowers surface temperatures by 40–50 degrees Fahrenheit
  * Energy savings can reach 15%–30%
  * Reduces noise for building occupants
  * Increases the life of the roof and reduces roof maintenance
  * Contributes to biodiversity and creates habitats for birds and invertebrates
  * Filters air pollutant particles
  * Increased storm event safety
  * Neighborhood diversity
  * Aesthetic value
  * Reduces need for retention ponds and ditches