The variations in angled slopes for flat roof systems depend on the types of drainage the property decides to install.
Slope roof parapet.
At the highest point of the sloped roof the parapet is about 10 tall at the lowest point the parapet is about 14 tall.
Roofing association manuals as well as the code book specify a minimum slope of 1 4 inch per foot for low slope roofing.
These are fitted at either end of a parapet wall meaning the flat is typically angled in two directions from the middle.
A parapet wall is a low or dwarf wall built along the edge of the roof terrace walkway balcony etc.
The same with protections from falling such as a balustrade parapet walls or surrounding raised plant beds used as a living or public dining space.
Slope the top of them inward so they don t stain the building façade.
And always have drip edges front and back so they don t stain the building façade.
Different types of parapet walls and their uses are discussed below.
The parapet itself is standard wood framing with an applied siding in this case t g 1 4 cedar.
Make sure there is a waterproof membrane under the coping.
Thus the three main drainage systems that affect how you slope a flat roof are.
Parapet water management keep rainwater from getting into the top of them.
The assembly is straight forward but what complicates matters is that the roof needs to be vented.
Parapet walls can be constructed using different materials like reinforced cement concrete steel aluminium glass etc.