Case 2

Clogged Drainage due to Dead Leaves and Soil

Needless to say that vegetation on the roof gardens will lead to falling leaves while trees grow. Unless these fallen leaves and other debris on the roof garden or sky terraces are properly managed it could lead to various issues, especially with the plumbing and drainage system. As taken in this case, the leaves and the soil from planters of the roof garden has washed down with rain and has clogged drain paths which potentially leads to severe water ponding.

Certain design details can be utilized with the design of roof gardens to avoid such issues; with the use of swales to capture runoff soil and grills to protect drains from debris. Inferior maintenance practices can be a catalyst to this issue as well. Proper maintenance of the roof gardens and timely clearance of dead leaves and debris is therefore of paramount importance to provide clear drainage and irrigation systems.

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