[Greenbuilding] passive solar homes - floors

[Leslie Moyer]

Mike O'Brien wrote:
> Our house has has some concrete floors, which are fine as far as  
> temperature, but we laid cork over the concrete in the kitchen for  
> some resiliency and clay in the living room for color and nice feel  
> on bare feet.

Mike, is there a trick to laying clay over concrete?  Is there anything 
you have to do to prepare the surface of the concrete to take the clay? 

--Leslie