Aircrete as insulation

  • Can anyone tell me what the ratio of concrete to foam should be for a vertical insulation usage? I do not need great strength as the insulation would be encapsulated in wall cavities. The wall cavities are 16" x 96" x 3". There is fiberglass insulation in the cavities already and I suspect that it would be compressed by the AC injection and only about a 1.5" thickness of AC would be able to be injected. Please help me as soon as possible since winter is coming on!

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