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no edit summary
| See below
| See below
|-
|-
| Mulch
| [[Mulch]]
|
|
* 0.7 for wood based
* 0.7 for wood based
* 0.4 for aggregate based
* 0.4 for aggregates
| colspan="2" |75 ± 25 mm
| colspan="2" |75 ± 25 mm
|-
| [[Biofiler media]]
| 0.3 typical
| colspan="2" |
* 300 mm to support turf grass and accept only roof runoff
* 600 mm to support flowering [[perennials]] and decorative [[grasses]]
* 1000 mm to support [[trees]]
|-
| [[choker gravel|Choker course]]
| 0.4 typical
| colspan="2" |100 mm
|-
| Embedding reservoir
| 0.4
| Is equal to underdrain pipe diameter
| Not applicable
|-
| Storage reservoir
| 0.4
| See below
| See below
|}
|}