Hello, my husband is starting to construct a wood fire oven. We are tryng to gather as much information as we can, because we don't want to make many mistakes and then regretted.This forum has fantastic information. Right now we are trying to figure out how much perlite and cement to use for a 42" oven size. Over here is very difficult to find the perlite and they only sell small bags. We know the ratio 5:1 but I want to know approximately how much of perlite and cement to use for that size. Also I am confused about how to insulate the dome. Do we have to cover the firebricks with the vermiculate/concrete mix alone or do we need to use the vemiculite/ concrete and some other insulating material.
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Rosa from Orlando