What is the best drainage system that I can design?

A well-designed roof drainage system is essential for any home or commercial building. Roof drainage systems help to direct rainwater away from the building, preventing damaging leaks and potential damage to the structure of the building that can occur due to water infiltration. Roof drains should be placed in strategic locations on the roof to ensure proper drainage and to reduce the risk of pooling or flooding around the foundation.

When designing a roof drainage system, consideration should be given to existing structural elements such as vents, protrusions, and other obstructions that can impede proper water flow. Roof drains should also be placed at regular intervals along the run of the roof so that water can drain properly and not accumulate in an area where it could cause damage. Roof drains should slope slightly downward toward their outlets to ensure that water is directed away from the building quickly and efficiently.

In some cases, a gutter system may also be necessary in order to provide additional support for heavier rains or snow melting off of roof surfaces. Gutters are usually attached directly to eaves or fascia boards and direct rainwater away from windows, doors, walls, and other vulnerable points around a structure. Additionally, downspouts should also be connected to gutters so that they can direct runoff away from walkways and driveways where it could create slippery conditions or pooling puddles.

It’s important to note that roofs must be graded correctly in order for a drainage system to work properly. Roofs need a slight pitch so that water will flow away from any low spots on the roof towards its outlet locations instead of pooling up in those areas which could eventually seep into walls or worse yet cause serious structural damage if left unchecked. When considering all these factors together, one of the best overall options for designing an effective roof drainage system is an internal scupper system with outlets placed strategically around the perimeter edges of your roof with appropriate slopes leading down towards their outlet locations.