[Bldg-sim] Modeling a Green Roof

[Brian Fountain]

  Chris,

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.

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.

Cheers,

Brian

On 9/10/2010 3:45 PM, Chris wrote:
> here any good guidance available on the thermal properties of a green 
> roof for use in an energy model?
>
> -- 
> Chris Flood BSc (Eng)
> Senior Building Analyst & Energy Modeller
>
>
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-- 
Brian Fountain, Principal
GreenSim

voice - 519-489-0112
email - bfountain at greensim.com

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