Difference between revisions of "General characteristics of extensive and intensive green roofs"
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| − | <td width="25%>Growing medium depth</td> | + | <td width="25%">Growing medium depth</td> |
<td width="25%">6 inches or less</td> | <td width="25%">6 inches or less</td> | ||
<td width="25%">25% of green roof area above or below 6 inches</td> | <td width="25%">25% of green roof area above or below 6 inches</td> | ||
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<td width="25%">Maintenance</td> | <td width="25%">Maintenance</td> | ||
| − | <td width=25%>Varies, but generally lower than for intensive green roofs</td> | + | <td width="25%">Varies, but generally lower than for intensive green roofs</td> |
| − | <td width=25%>Varies</td> | + | <td width="25%">Varies</td> |
| − | <td>Varies, but generally higher than for extensive green roofs</td> | + | <td width="25%">Varies, but generally higher than for extensive green roofs</td> |
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<td width="25%">Stormwater management</td> | <td width="25%">Stormwater management</td> | ||
| − | <td width=25%>Best cost-benefit balance</td> | + | <td width="25%">Best cost-benefit balance</td> |
| − | <td width=25%>More growing medium and more vigorous plant growth provides marginally greater stormwater volume benfits</td> | + | <td width="25%">More growing medium and more vigorous plant growth provides marginally greater stormwater volume benfits</td> |
| − | <td width=25%>More growing medium and more vigorous plant growth provides marginally greater stormwater volume benefits</td> | + | <td width="25%">More growing medium and more vigorous plant growth provides marginally greater stormwater volume benefits</td> |
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</table> | </table> | ||
[[category:table]] | [[category:table]] | ||
Revision as of 21:10, 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 |