Roof Rainwater Drainage Systems

The 6 slotted triangle shape is used beneath the aggredrain layer and allows for water to flow freely.

Roof rainwater drainage systems.

With this system large square openings are made along the edge of the roof that shoot the water away from the side of the building. Because the siphoning force helps move the water siphonic drain systems can employ horizontal leaders instead of sloped pipes which rely on gravity alone for drainage. The green roof solutions drainage conduit is a stainless steel channel for use with the aggredrain system. That line eventually emptied into the low spot in the back yard.

Inexpensive gutters are the easiest types of drain systems to get and install. Rain gutters are the most common drain system in use for all types of roofs. To use this calculator input the dimensions of your roof only area connected to rainwater harvesting system and the amount of rainfall in inches. Commercial flat roofs need interior drains and scuppers to collect water instead.

Can keep water from pooling and building up near the building foundation. But don t let it scare you. While pitched roofs can rely on gravity to move water flat roofs can t just rely on a typical gravity driven gutter system. Where the tube passes by the downspout from the gutter we installed a y fitting and drained the roof water from the gutter system directly into the main drainage line.

As the roof collects rain the water must be transported quickly and safely away by a drainage system. Rainwater harvest calculator length. Siphonic drains typically cost more than other drain systems but they work smoothly and require relatively little maintenance. Scuppers are the most effective drainage solution for flat roofs.

Keeps water from pouring off of the roof in an uncontrollable manner. High maintenance gutters need continual cleaning and. Protects doorways and window openings. Once all the parts of the drainage system were installed we covered the tubes with several inches of rock.

See french drains for details of handling roof runoff at flat or poorly drained sites. This is a large rainwater catchment system. The cistern typically located underground may be constructed of various materials including cinderblock reinforced concrete or precast concrete fiberglass or steel. The 1 100 rain water catchment system.

For flat sites it may be necessary to drain into a drywell or french drain system or into a pumping chamber that sends drainage to a remote storm drain or drywell.