Is it possible to retrofit an existing slab built in the 70's; to a modern ecoHome standard? I imagine the house would have to be raised (jacked up) and possibly install the new slab on top of the old if it's in good enough condition? Any ideas on the best way to proceed if I was to go that route? I've seen stories at www.jlconline.com where contractors have raised houses a full story in flood prone areas of Texas after hurricane Harvey. I don't think I would have to go that high though. Anyinsight is appreciated.