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<p>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. </p>  
<p>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. </p>  
<p><strong>The fundamental components of an extensive green roof are:</strong></p>
<p><strong>The fundamental components of an extensive green roof are:</strong></p>
*a roof able to withstand the load,
<ul>
*a roof membrane resistant to root penetration,
<li>a roof able to withstand the load</li>
*a drainage layer,
<li>a roof membrane resistant to root penetration</li>
*a filter layer,
<li>a drainage layer</li>
*a layer of planting medium,
<li>a filter layer</li>
*plants.
<li>a layer of planting medium</li>
<li>plants</li>
</ul>
 
<p><strong>Additional components may include:</strong>
<p><strong>Additional components may include:</strong>
*an irrigation system,
<ul>
*pre-formed tray modules.</p>
<li>an irrigation system</li>
 
<li>pre-formed tray modules</li>
</ul>
</p>
</div>
</div>


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