Roof structure for a submersible house
We are building a roof structure on a house in the flood plain of Lake Travis. The plan is to build a roof that is breathable on both sides of the roof deck which will be pressure treated plywood or marine plywood. The roofing material will be metal standing seam. What kind of underlayment should be used on the roof decking under the lath strips that the metal roof is attached to? I am thinking that the underlayment should be highly permeable so that the decking can dry to the outside as well as the inside should it become submerged. My builder want to use felt or tar paper, I think it should be something like Vent 3 or Brea by Nemo industries. Please advise.
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