Drainage – Lightweight & Super Lightweight Systems

This lightweight drainage layer for green roofs, has been extensively tested in lab conditions to ensure it’s optimum  performance, as it plays an important role in the total system structure of a lightweight green roof. It stores water and allows excess water to drain away. During dry periods, the stored water can be reabsorbed by the vegetation layer above and the drainage contributes to the aeration of the plant roots.

Please note when using a gravel border, extra drainage is required to sit beneath the gravel.