Forum / 'Hebel' aerated concrete panels as hearth insulation?


Hi Folks, Thanks for admitting me to your group. I'm considering use of Hebel light-weight concrete panels as hearth insulation for a small (75cm)  'pompeii' style oven. I realise that it's probably no good for the actual floor of the oven but I'm thinking of using the panels for the hearth foundation underneath. I'm wondering if anyone has done this successfully and what I need to know? Any help greatly appreciated. Also any references... thanks, Sam, Adelaide.