[Greenbuilding] A "green", walkable, low-slope roof membrane?

[Chris Green]

George J. Nesbitt wrote:
> In the age of global warming, it is even cooler to be a cool roof.
> (green isn't as reflective) www.coolroof.org 
The link doesn't work. I assume you meant

http://www.coolroofs.org/

Interestingly, in searching for this site, Google tried to steer me to 
SolaRoof.org, which promotes "liquid bubble insulation" for greenhouses 
and the like. 
I believe this concept has been mentioned on this list, but if not, 
"liquid bubble insulation" refers bubbling soapy liquid with enough air 
that the bubbles travel through the clear plastic tubes forming the 
greenhouse's shell. This is said to prevent excess heat from entering 
the structure during the warmer times, and somehow prevents heat from 
leaving the building during colder times.
One wonders if they include some method of storing heat for long periods 
of time? 
The proponents behind this are claiming that the greenhouse will use as 
little as 5% the energy an equivalent greenhouse without the insulation 
would use for heating and cooling.
Does this work?
I have no idea, but I have a believe that some insects and other 
creatures surround themselves with similar bubbles  ( I.E., "grasshopper 
spit" ) for protection and possibly to better control the temperatures 
surrounding them.
So I won't be too surprised if it works as advertised.
http://www.solaroof.org/wiki

Cheers,

Chris Green.