It's solid concrete, so it's really strong. It's got excellent insulation five inches of foam with solid concrete in between. And great thermal mass it stores up heat and dissipates it slowly.

It's solid concrete, so it's really strong, ... It's got excellent insulation five inches of foam with solid concrete in between. And great thermal mass it stores up heat and dissipates it slowly.

It's solid concrete, so it's really strong. It's got excellent insulation ù five inches of foam with solid concrete in between. And great thermal mass ù it stores up heat and dissipates it slowly.

It's solid concrete, so it's really strong, ... It's got excellent insulation ù five inches of foam with solid concrete in between. And great thermal mass ù it stores up heat and dissipates it slowly.