DRAINAGE & WATER RETAINING LAYER:

The drainage layer on a flat roof is a critical part of any Green Roof system. The ZinCo Green Roof systems are developed to recreate the natural growing conditions of the plants. The so called 'drainage layer' performs two important functions in this regard. It retains the necessary water to support the plant community and also functions to carry away the surplus water.

If the drainage layer is improperly designed and is not of sufficient capacity the waterproofing is in continuous contact with water, which may result in damage to the roof membrane and water back up into the plant material. In addition, the growing medium directly above the drain layer will also become saturated. Prolonged saturation of the growing medium will lead to rotting of the plant root systems and the resultant plant failure. Additionally, a permanently wet Green Roof will also lose its thermal insulating properties.

The ZinCo Floradrain layer is designed in such a way that it not only provides excellent drainage, but also retains rainwater in storage troughs as a buffer for periods of drought. The plant material access the stored water by evaporation.

ZinCo offers a number of different drainage layers each designed for different applications offering the Green Roof designer a system suited to every conceivable roof application and plant community.

The ZinCo drainage layers are manufactured from recycled materials.