#1  
Old 03-20-2013, 12:40 AM
Serf
 
Join Date: Mar 2013
Location: New Zealand
Posts: 7
Smile How much vermiculite

Hi would anyone know how many litres of vermiculite one would need when building a 39inch WFO.Intend putting 100mm in Hearth and 100mm in dome. This would be based on 6:1 for hearth and 12:1for dome
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Old 03-20-2013, 04:12 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,828
Default Re: How much vermiculite

V ( sphere) = 4/3 phi rxrxr. Calculate outer radius minus inner radius and remember it's half a sphere.
V ( slab) = lxbxh

About 400 L at a rough guess.

I use 10:1 over the dome, I find 12: 1 a bit hard to make it stick on the vertical. Once it starts to lean in you can make the brew weaker.

Last edited by david s; 03-20-2013 at 04:14 AM.
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