I guess the world is getting smaller. Yesterday I rec'd photos of a Pompeii oven in Sweden, and today I heard from a gentleman building a Pompeii oven in Tailand. It sounds like you can't find vermiculite there, so I wanted to ask if anyone has had experience using old-world insulators. I have heard that ash, or an ash and sand mix makes a good insulator for around the dome.
Any thoughts on that?
As an experiment, I covered my first precast oven in San Gimignano with sand, then an inexpensive insulation blanket -- with mixed results. Sand has a lot of thermal mass and it really heats up, so the oven was so-so at holding heat inside the chamber, and the stucco shell got hot.
What are the properties of wood ash?
Alf, you use sand in the large commercial bread ovens...right?
James
Any thoughts on that?
As an experiment, I covered my first precast oven in San Gimignano with sand, then an inexpensive insulation blanket -- with mixed results. Sand has a lot of thermal mass and it really heats up, so the oven was so-so at holding heat inside the chamber, and the stucco shell got hot.
What are the properties of wood ash?
Alf, you use sand in the large commercial bread ovens...right?
James
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