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→Overview
Extensive green roofs are the most commonly used type of green roof used for stormwater in our region. </p>
Extensive green roofs are the most commonly used type of green roof used for stormwater in our region.
{|class="wikitable"
|+ Types of green roofs: defined by construction depth
|-
!style="background: darkcyan; color: white"|Property
!style="background: darkcyan; color: white"|Extensive
!style="background: darkcyan; color: white"|Intensive
|-
!Planting medium depth
|10 - 15 cm||> 15 cm
|-
!Loading
|up to ~250 kg/m<sup>2</sup>||Limitless where 'roof' is at ground level
|-
!Cost
|Typically lower||Higher, including structural accommodations and plant selection
|-
!Maintenance
|Depends highly on the aesthetic expectations of stakeholders||Will be comparable to other landscapes, depending on access requirements.
|-
!Stormwater benefit
|Provides best cost-benefit balance||Varies highly
|-
!Biodiversity benefit
|Lower, depends on planting||Greater potential, depends on planting
|-
!Amenity benefit
|Usually visual only<br>i.e. inaccessible||Often accessible
|}
<table class="table table-responsive table-striped">
<table class="table table-responsive table-striped">
<caption><strong>Types of green roofs: defined by construction depth</strong></caption>
<caption><strong>Types of green roofs: defined by construction depth</strong></caption>
</table>
</table>
<br>
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Intensive green roofs are commonly used for amenity space on condo developments or sometimes as urban farms. They are sometimes referred to as roof gardens and encompass diverse uses, design priorities and technical specifications. In the most extreme examples, many urban parkettes including large shade trees may be included in this class, if they have parking garages beneath. As such the discussion on this page is limited to extensive green roofs.8
Intensive green roofs are commonly used for amenity space on condo developments or sometimes as urban farms. They are sometimes referred to as roof gardens and encompass diverse uses, design priorities and technical specifications. In the most extreme examples, many urban parkettes including large shade trees may be included in this class, if they have parking garages beneath. As such the discussion on this page is limited to extensive green roofs.8