Thanks! I'll look into that. It's possible we may go ahead and start on the foundation ahead of time, so glad you told me that. I guess when they come they can look at our plans and give us an idea on what to do next. Tell me this, does radiant heat make just the floor warmer or help warm up the room? I think I remember you mentioned this was a whole different set up from the geo. How does this work? Is this a do it yourself project? Do you think we will have enough hot water in the winter to run this? I found this site on the PEX diy http://www.pexheat.com/