EnkaRetain & Drain 3211 for Green Roofs/Vegetative Roof Gardens
Water Retention Drainage Mat- Green Roof's love this stuff!
EnkaRetain & Drain 3211 was specifically designed for green roofs. This multi-function composite consists of a 40% post-industrial recycled polypropylene drainage core of fused, entangled filaments and a specially formulated water retention fabric bonded to one side.
This Drainage Mat:
- Is made of entangled filaments that are molded in a square pattern.
- The water retention fabric is a 14.7oz.yd² non-woven polypropylene fabric made of 100% post industrial recycled fibers.
- This drainage mat will hold 15 times its unit weight of water.
- The protection fabric eliminates the need for protection board and stops penetration and migration of bitumen membrane.
- Inert to biological degradation and naturally encountered chemicals, alkalis and acids.
- Can help to contribute up to 2 LEED points when used with other recycled content products.
- When used as part of a green roof, ti can add towards additional LEED points by reducing storm water runoff, heat islands and energy consumption.
Features and Benefits:
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Roof Gradient |
Problems |
Solutions |
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Steep 5-20° (9-36%) |
· Runoff increases with roof gradient · Water runs off too quickly on steep slope, growing substrate can become dry especially near the top of the roof · Risk of sliding of green roof materials on the roof at high gradients |
· Use thin profile Enkadrains (0.25”) to slow down runoff and allow time for the rain to soak into the growing substrate · Use EnkaDrain&Retain to retain water and compensate for higher runoff
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Technical Data of EnkaRetain & Drain 3211 for Green Roofs:
