Green Roof Roof Drains

During a dry period the water stored can be reabsorbed by the vegetation layer above.

Green roof roof drains.

Intensive layered green roof intensive green roofs have a deeper soil depth therefore the roof drain enclosure height is typically 12 or more. The drainage off a green roof surface is a particularly important component to maintain optimum growing conditions in the growth medium to managing heavy rainfall without sustaining damage to growth media due to erosion or ponding of water and to ensure the sound engineering and structural integrity of the roof. Green roof drains watts unique designs are engineered to accommodate the fast emerging and often shifting requirements for green roof drainage. The drainage also contributes to good aeration of the plant roots.

Zurn manufactures a line of green roof drains featuring customizable enclosures to align with the green roof surface. The drainage layer has an important role to play in the total system structure of a green roof. Z110 green roof drain shown with 18 height for intensive green roofing applications. See the full list of features.

It buffers water and allows excess water to drain away. The most critical role of the drainage layer is to provide an adequate flow of water off the roof during and after rainfall. Green roof solutions offers many different drainage layer options depending on system goals regarding water retention.