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Chris,<br>
<br>
In my experience, the impact of a green roof on the building energy
is pretty small. In the winter, the soil layer is reasonably
saturated so isn't adding much insulation. In the summer, there is
some shading effect to reduce solar but it is difficult to
quantify. <br>
<br>
Attached is "Greenroofs in Canada" which includes a look at the
energy impact of a greenroof on a building. It does discuss some
modelling but the increase in insulation value seems excessive to
me.<br>
<br>
Cheers,<br>
<br>
Brian<br>
<br>
On 9/10/2010 3:45 PM, Chris wrote:
<blockquote
cite="mid:AANLkTimRZP3u4jPYQ6ZOdLRdrXwBdj3e6WmF8VYC79zh@mail.gmail.com"
type="cite"><font color="#000066"><font face="comic sans
ms,sans-serif">here any good guidance available on the thermal
properties of a green roof for use in an energy model?<br
clear="all">
</font></font><br>
-- <br>
Chris Flood BSc (Eng)<br>
Senior Building Analyst & Energy Modeller<br>
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<pre class="moz-signature" cols="72">--
Brian Fountain, Principal
GreenSim
voice - 519-489-0112
email - <a class="moz-txt-link-abbreviated" href="mailto:bfountain@greensim.com">bfountain@greensim.com</a></pre>
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