What size of vermiculite should I use for my mix under the oven floor and what kind sand ?
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First time 42" oven build
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I used a mix of Perlite, medium to coarse from two different sources, and that worked well. The mortar sand I used is called “mason’s sand” at our local builders supply store and is also a mix of fine to medium 1,5mm largest particle. I sieved it using a window screen to get the largest particles out. I also collected, died, and sieved the slurry from cutting the bricks and added that to the sand, about 1/3 slurry, and 2/3 sand,if it's worth doing, it's worth doing to the best of your ability!
Sixto - Minneapolis
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Trying to figure out where on my slab to place my form for vermiculite insulation concrete. What would be a good place to put it in relation to the front of the slab for a good to work the oven distance.The problem is I dont know where my front arch will end. Is there a general measurement from the center of the oven to the front arch ? It is a 42" oven. I am kind of guessing with the form where the front will be. Should it be right at the front of the slab ?
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