Solar Kiln Floor

[GF]

I am wanting to build a solar kiln with a concrete floor and would like to see what one would recommend to use for insulation and a vapor barrier.

I have seen articles using blue and ping insulation board for the insulation. Any ideas are appreciated.

[WoodChucker]

I building a dehumidifier kiln and used 2" blue foam and 6mil poly under the cement.  I guess it would work for a solar kiln as well, I don't see why not...... good luck!

R.T.