Table 4 Mean substrate depth on nine extensive green roofs in order of increasing roof age
From: Vegetation composition of old extensive green roofs (from 1980s Germany)
Roof age grouping | Roof # | Roof name (in order of age at time of survey) | Mean substrate depth (mm) |
|---|---|---|---|
20–21 | 7 | S-Rathausgaragedach, PV | 75.4 |
| Â | 8 | S-Rathausgaragedach, low | 69.8 |
| Â | 9 | Killesberg Dach | 84.7 |
22–23 | 1 | FH Nürtingen | 72.3 |
|  | 2 | Römermuseum, Köngen | 76.6 |
24–25 | 4 | Gärtnereihof Tübingen | 61.5 |
| Â | 5 | Verkehrsbetrieb Area 1 | 52.8 |
| Â | 6 | Verkehrsbetrieb Area 2 | 58.1 |
>26Â yr | 3 | Pliensaufriedhof, Esslingen | 61.6 |