Posted By mark S on 10/31/2009 6:26 PM
As for techbilt I just saw a project finished last month. Plan on visiting their plant soon. As for heat transfer the tubes don't touch. Picture two 1x2 x 18 ga tubes (or 2x2) opposite each other with rigid foam in between (5.5" up to 12") They sculpt out where the tubes go- why I don't know because the air space would get you extra R value. The tubes are fastened by screws. And all the strength appear to be from the tubes for the loads.[/quote]
Are you talking about VIRTUVIAN http://www.vitruvianbuilt.com/