Trying it on here now. I am looking to buy any block and beam floor insulation. The stuff that is t shaped, fits in between the beams. The manufacturers of these insulation panels (tetris, jablite, readytherm.....) do not sell the insulation separately but only in combination with buying the concrete beams. So they only selling the complete floor system. I m trying to get around that as I can get many parts of the floor for cheap or free( e. G. The concrete beams would be close to