I have been told by a few hardwood floor suppliers (bamboo and oak) that
laying these 5/8" thick floors over the hydronic heating tubes is ok. The
oak floor planks are in one piece whereas the 5/8" bamboo flooring has three
layers with the middle one perpendicular to the other two.
Just a few days ago I had a contact with another supplier who said that only
bamboo veneer over a softwood is suitable for laying over hydronic heating.