Roof Drain Slope

Same logic with 1 8 slope 1 16 slope etc.

Roof drain slope.

Since the pitch of the roof is lower it can act as a catch all for tree limbs and other debris. The best type for the application depends on several factors such as the size and slope of the roof the desired appearance and how much regular maintenance the drain system might need. The angle is not significant enough to prevent water from pooling on the surface. According to the chart for 1 8 slope per 12 of pipe for 5 000 square feet of roof area with a 6 per hour of rainfall the required pipe size is 8.

This may eventually cause leaks and other damage. Tips on calculating drain pipe slopes. Care must be given so that debris does not collect and thus cause damage. When the bubble on a level is about 1 4 of the way past the line it is about a 1 4 slope.

Increasing the angle of a flat roof will always increase the speed of water movement across the surface. For flat roof drainage where you place your drains scuppers and the final material of the roofing is more important. To size the vertical roof drain for the same parameters 5 000 square feet of room area and 6 per hour of rain consult table 1106 2 figure 3. Due to the gradual low slope of this type of roof rainfall will not drain as effectively.