Glass and Salt Hearth?

[martin_80x]

Hi, I'm at the point to build the heart, and I saw some hornos de barro or "mud ovens" in which they use glass and salt,
Is that better than vermiculite?
videos:
Como hacer un horno de barro - YouTube
Horno de barro y piedra (pizza Oven) en Durango - YouTube

[thickstrings]

Re: Glass and Salt Hearth?

In a word....no...... I see no insulative elements in either...not to mention that salt melts in water...