Solid Hardwood, Engineered and Laminate Flooring - Hardwood Floor Instalation over radiant heating.

I have a question for the pro's out there. If any, which type of flooring can I install over Radiant heating. I have a late 50's (1958) Alliance house with slab base and radiant heating. What king of hardwood floor can I install over this. I have heard conflicting reports from local contractors. And I just want to make sure I do not through money away. "PS. is it worth it to switch from water radiant heating to electric - completely disabling the water system that is in there."

This is my first post and it looks like I will be back here quite a bit.
I just move here from another country where I was a licensed electrician. Although we had 220-240 I will try and help out as much as I can on the board.

It will be very important that you maintain temperature and humidity levels in the home. Temperature at around 70 degrees and humidity between 35-55% year round. A vapor retarder will need to be installed over the concrete. Don't install anything wider than 2 1/4" strip flooring because smaller boards tend to have less movement. Heat should be turned on for several weeks before wood is installed. Wood needs to be placed in rooms where it is going to be installed, no higher than three boxes for 7-10 days so that it adjusts to temperature and humidity of the home. You will need to install a species of wood that offers greater stability such as White and Red Oak, Teak, American Walnut, Mesquite and American Cherry.

Go to www.nofma.org for information on installing hardwood and radiant heat.

Kahrs engineered flooring performs well up here in a dry climate over radient heat. But the humidity levels should be kept high as Twelvepole suggested.

If you already have hydroponic, why mess with it? Electric can burn out or have hot spots. I would use Hydroponic or go without!