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Having the stucco removed and HardiePank fibercement siding installed. The house has overlapped Thermo-Ply as the sheathing, and the contractor wants to put plywood over the thermo-ply. Should I be concerned about moisture getting trapped between plywood and the Thermo-Ply?

  • Welcome. What's the reasoning for the additional sheathing? – isherwood Jun 16 at 16:45
  • Also, one could assume that a new waterproof membrane would be installed under the siding. That's maybe more of a concern. – isherwood Jun 16 at 18:27

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