I've seen extruded concrete planting borders. They not only look odd and fake, but somehow like some monster took a dump. But, these are the same folks who's stone pediment front porch roof is supported by two 4x4 posts. I get to see all kinds of strange things when walking the dogs. -jc On Mar 11, 2004, at 8:17 PM, [log in to unmask] wrote: ArialIn a message dated 3/11/2004 4:47:02 PM Eastern Standard Time, [log in to unmask] writes: Arial> how the hell does the concrete not slump? ArialI want to know this as well. Arial4040,0000,4040My friend Clark in AZ reported several years ago that he'd seen a truck out in some new suburb which was extruding concrete street curbing.  Sounded about as scatological as one could get. Arial  Arial4040,0000,4040Seems to me that this business of printing concrete house walls would be somewhat limited by the size of the printer as well as the sprayability of the concrete ink.  But what do I know-- I'm a hand-drafting dinosaur. Arial  Arial4040,0000,4040Ralph  Arial