Before revision: Cause Most flat roof systems (properly called "low-slope roofs ") are designed with a slight pitch to shed water off the sides, usually into gutters, scuppers, internal drains, or a combination of these.
After revision: Cause Most flat roof systems (properly called "low-slope roof systems ") are designed with a slight pitch to shed water off the sides, usually into gutters, scuppers, internal drains, or a combination of these.