Table 9 The Normalized percentage (%) values of different factors for green roof systems
| Â | SB | DWC | NFT |
|---|---|---|---|
Initial cost | 89 | 87 | 0 |
Ease of Maintenance | 50 | 60 | 90 |
Beginner Friendliness | 100 | 50 | 20 |
Water Saving | 0 | 4 | 65 |
Productivity | 74.4 | 97.6 | 100 |
Heat Gain Reduction | 92 | 100 | 60 |