I just completed insulating my oven, but I'm so sure I did it correctly. I mixed 10 parts of vermiculite to 1 part portland cement and 3 parts of water. I also place three layers of heavy duty aluminum foil over the bricks and then proceeded to put wire mesh over the foil then the insulation. From what I see of some of the mixture that fell on the ground and dryed it's very loose and I'm afraid when I take the forms away it will crumble. did I do it right? will it crumble should I stucco it? Help!
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