Difference between revisions of "General characteristics of extensive and intensive green roofs"
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| − | <td | + | <td>Growing medium depth</td> |
| − | <td | + | <td>6 inches or less</td> |
| − | <td | + | <td>25% of green roof area above or below 6 inches</td> |
| − | <td | + | <td>More than 6 inches</td> |
</tr> | </tr> | ||
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| − | <td | + | <td>Accessibility</td> |
| − | <td | + | <td>Often inaccessible</td> |
| − | <td | + | <td>May be partially accessible</td> |
| − | <td | + | <td>usually accessible</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td | + | <td>Fully staurated weight</td> |
| − | <td | + | <td>Low: 10 to 35 lb/ft<sup>2</sup> (48.8 to 170.9 kg/m<sup>2</sup>)</td> |
| − | <td | + | <td>Varies: 10 to 35 lb/ft<sup>2</sup> (48.8 to 170.9 kg/m<sup>2</sup>)</td> |
| − | <td | + | <td>High: 10 to 35 lb/ft<sup>2</sup> (48.8 to 170.9 kg/m<sup>2</sup>)</td> |
</tr> | </tr> | ||
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| − | <td | + | <td>Plant diversity</td> |
| − | <td | + | <td>Lower</td> |
| − | <td | + | <td>Greater</td> |
| − | <td | + | <td>Greatest</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td | + | <td>Cost</td> |
| − | <td | + | <td>Low</td> |
| − | <td | + | <td>Varies</td> |
| − | <td | + | <td>High</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td | + | <td>Maintenance</td> |
| − | <td | + | <td>Varies, but generally lower than for intensive green roofs</td> |
| − | <td | + | <td>Varies</td> |
| − | <td | + | <td>Varies, but generally higher than for extensive green roofs</td> |
</tr> | </tr> | ||
<tr> | <tr> | ||
| − | <td | + | <td>Stormwater management</td> |
| − | <td | + | <td>Best cost-benefit balance</td> |
| − | <td | + | <td>More growing medium and more vigorous plant growth provides marginally greater stormwater volume benfits</td> |
| − | <td | + | <td>More growing medium and more vigorous plant growth provides marginally greater stormwater volume benefits</td> |
</tr> | </tr> | ||
</table> | </table> | ||
[[category:table]] | [[category:table]] | ||
Revision as of 21:13, 17 June 2013
General characteristics of extensive and intensive green roofs (adapted from Green Roofs for healthy Cities and the cardinal Group, 2006).
Link to this table
| Characteristic | Extensive | Semi-intensive | Intensive |
|---|---|---|---|
| Growing medium depth | 6 inches or less | 25% of green roof area above or below 6 inches | More than 6 inches |
| Accessibility | Often inaccessible | May be partially accessible | usually accessible |
| Fully staurated weight | Low: 10 to 35 lb/ft2 (48.8 to 170.9 kg/m2) | Varies: 10 to 35 lb/ft2 (48.8 to 170.9 kg/m2) | High: 10 to 35 lb/ft2 (48.8 to 170.9 kg/m2) |
| Plant diversity | Lower | Greater | Greatest |
| Cost | Low | Varies | High |
| Maintenance | Varies, but generally lower than for intensive green roofs | Varies | Varies, but generally higher than for extensive green roofs |
| Stormwater management | Best cost-benefit balance | More growing medium and more vigorous plant growth provides marginally greater stormwater volume benfits | More growing medium and more vigorous plant growth provides marginally greater stormwater volume benefits |