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Line 129: ----[[File:YorkU1.jpg|thumb|Recently laid ''Sedum'' mats on a ground level podium roof.]][[File:YorkU2.jpg|thumb|Detail showing the early root development through the mat to the granular planting medium.]] <h4>Water quantity</h4>Green roof performance has not been reported to reduce over time. Controlled studies have instead indicated that maturing green roofs may have improved water retention properties <ref>http://www.sciencedirect.com/science/article/pii/S0022169417300768</ref>.<h5>Water balance</h5>{{:Green roofs: Water balance}}<h5>Peak flow control</h5>{{:Green roofs: Curve}}<h4>Water quality</h4>{{:Green roofs: Water quality}}
→Performance
==Performance==
==Performance==
{{:Green roofs: Performance}}
{{:Green roofs: Performance}}
==Incentives and Credits==
==Incentives and Credits==