Big Green: Green Roofs

[Christopher Sweetnam-Holmes]

My understanding is that Greenroofs offer a lot of benefits- including  
stormwater retention, increased lifespan for roofing membrane,  
evaporative cooling from plants in the summer, absorbtion of air  
pollutants.
However I have never understood that a green roof has a thermal  
insulation advantage.

cheers,
Christopher Sweetnam-Holmes B. Int’l Bus, B.E.D.S (Arch), LEED AP
principal | directeur
---
EcoCité Developments
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Les Developpements EcoCité
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1-888-ECOCITE



On 2-Apr-09, at 2:21 PM, Dean Sherwin wrote:

> At 08:21 AM 4/2/2009, Darragh Brady wrote:
>
>> I can't offer you peer reviewed ashrae stuff but everything I have  
>> heard/read seems to say that there is virtually no R value to a  
>> vegetated roof especially when they are doing their job and holding  
>> water- Perhaps when you get to the Chicago City Hall type roof with  
>> 4' of dirt it is a different story but when you have a 4" extensive  
>> type system I don't think you get much at all.
> Right next to that email came one for this conference - probably  
> many of you got the same.  Just a coincidence.  Also I wonder if  
> they tell the truth relative to the posting above ?  So often I hear  
> all kinds of claims about Green Roofs, not all perhaps factual.
>   http://www.designgreenconstruction.com/teleconference/product.php?pid=203131
>
>
>
>
> Dean Sherwin CPE
> Certified Professional Estimator
> LEED Accredited Professional
> CONSTRUCTION COST MANAGEMENT
> 3, Cherry Street
> PO Box 11
> Media, PA 19063-0011
> (610)892 8860
> fax (610) 892 7862
> costman at verizon.net
> _______________________________________________________________
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