Which membrane and insulation to choose for a frame house on a pile foundation?

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What membrane should be installed in the floor before installing the insulation? And what kind of vapor barrier should be placed on the insulation?

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Tyvek Solid or Soft + Isover Pro, covered with 22 mm OSB on liquid nails without additional vapor barrier.

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If you are interested in a cheap and good option, then: from the bottom Isospan A on tacker brackets + harness also to the tacker – any roll insulation (Isover, Ursa, Knauf, etc.) – top on liquid nails OSB 22 (or plywood 21 mm).

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It would be better if you do not put a membrane in the floor, but underlay the floor with a normal film. If there is a leak, the membrane is not good at leaking water in the liquid state.

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