Insulating Italian Hearth Bricks MT.Vesuvius ?

[castiron]

There is a local Craig listing on some one trying to sell some insulating bricks imported from Italy supposedly made from Mt.Vesuvius ash?Any one heard of these type of bricks.They are 4 in. thick by 10 wide by 14 long.Was thinking about getting a few for any future oven builds to use as a sub layer.Thanks for any info.

[dmun]

Re: Insulating Italian Hearth Bricks MT.Vesuvius ?

Unless they're close to free, I'd avoid mystery mystery substances as insulation. They could be great, they could be volcanic tufa, or they could be pressed toxic waste. Without a material data sheet from the manufacturer, you'd never know.

[castiron]

Re: Insulating Italian Hearth Bricks MT.Vesuvius ?

I was thinking the same thing.Bricks have no manf. marks,or like you say data on them.So it's a crap shot.Thanks for the input.