insulation boards Denver Colorado

[estezz]

I am trying to source some insulating boards to put under the firebricks of my hearth. I've heard of Glass Foam but cannot locate this in Denver. Any ideas?

[UtahBeehiver]

EJ Bartells now Distribution International carries CaSi board (ThermoGold 12) as well as FoamGlas. Our forum host also sells Al Si board as well but requires shipping.