Difference between revisions of "Assessing the performance of green roofs"
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| − | {{alert|The anticipated review period for this page is June through September 2013|alert-under-review}} | + | <noinclude>{{alert|The anticipated review period for this page is June through September 2013|alert-under-review}}</noinclude> |
Because exact maintenance requirements vary from roof to roof, we do not recommend developing maintenance specifications, but recommend developing example maintenance performance requirements, as described below. | Because exact maintenance requirements vary from roof to roof, we do not recommend developing maintenance specifications, but recommend developing example maintenance performance requirements, as described below. | ||
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Vegetation will be replaced with species and densities acceptable by Owner’s Representative anytime vegetated cover requirements are not met during the maintenance period. | Vegetation will be replaced with species and densities acceptable by Owner’s Representative anytime vegetated cover requirements are not met during the maintenance period. | ||
| + | <noinclude>==Related pages== | ||
| + | *[[Green roofs]] | ||
| + | *[[Overview for green roofs]] | ||
| + | *[[Types of green roofs]] | ||
| + | *[[Design criteria for green roofs]] | ||
| + | *[[Construction specifications for green roofs]] | ||
| + | <!--*[[Construction observations for green roofs]]--> | ||
| + | *[[Assessing the performance of green roofs]] | ||
| + | *[[Operation and maintenance of green roofs]] | ||
| + | <!--*[[Calculating credits for green roofs]]--> | ||
| + | *[[Cost-benefit considerations for green roofs]] | ||
| + | *[[Plant lists for green roofs]] | ||
| + | <!--*[[Additional considerations for green roofs]]--> | ||
| + | *[[Case studies for green roofs]] | ||
| + | *[[Links for green roofs]] | ||
| + | *[[References for green roofs]] | ||
| + | *[[Supporting material for green roofs]] | ||
| + | *[[Green roofs terminology and glossary]] | ||
| + | *[[Green roof fact sheet]] | ||
| + | *[[Requirements, recommendations and information for using green roofs as a BMP in the MIDS calculator]]</noinclude> | ||
| + | |||
| + | |||
<noinclude>[[Category:Assessing performance]]</noinclude> | <noinclude>[[Category:Assessing performance]]</noinclude> | ||
Revision as of 13:08, 22 August 2013
The anticipated review period for this page is June through September 2013
Because exact maintenance requirements vary from roof to roof, we do not recommend developing maintenance specifications, but recommend developing example maintenance performance requirements, as described below.
For acceptance of installation
Set the following requirements for, for example, 30 days after Substantial Completion, for roofs established using cuttings, pre-grown modules, or mats:
- minimum percent cover of specified plant species required;
- maximum percent cover and patch size of weed species (if any);
- maximum square feet of bare area allowed; and
- minimum thickness of media.
All areas that do not meet Performance Standards 30 days after installation shall be re-planted with original plant species and densities within 14 days of notification unless weather conditions are not suitable for planting as determined by Owner’s Representative.
Set the following requirements for, for example, 30 days after Substantial Completion, for roofs established using plugs, or pots:
- minimum percent of plants that are healthy as determined by Owner’s Representative;
- crowns of plants level with top of media;
- vigorous foliage;
- root balls broken and integrated into the soil;
- maximum square feet of area of bare area allowed (excluding any areas that have been established from seed alone); and
- minimum thickness of media
All areas that do not meet Performance Standards 30 days after installation shall be re-planted with original plant species and densities within 14 days of notification unless weather conditions are not suitable for planting as determined by Owner’s Representative.
For acceptance of maintenance
Set the following requirements for acceptance of maintenance:
- minimum percent cover of specified plant species required for each year of the maintenance period;
- minimum number of species present on the roof each year of the maintenance period; can also specify desired minimum percent cover needed to count as species diversity if desired;
- maximum percent cover and patch size of weed species (if any); and
- maximum square foot of bare area allowed each year of the maintenance period.
Vegetation will be replaced with species and densities acceptable by Owner’s Representative anytime vegetated cover requirements are not met during the maintenance period.
Related pages
- Green roofs
- Overview for green roofs
- Types of green roofs
- Design criteria for green roofs
- Construction specifications for green roofs
- Assessing the performance of green roofs
- Operation and maintenance of green roofs
- Cost-benefit considerations for green roofs
- Plant lists for green roofs
- Case studies for green roofs
- Links for green roofs
- References for green roofs
- Supporting material for green roofs
- Green roofs terminology and glossary
- Green roof fact sheet
- Requirements, recommendations and information for using green roofs as a BMP in the MIDS calculator