D. - I saw you on the personals too and would love to talk and get to know you. I'm in search of friends. I live on a small island in WA state. I keep bees and chickens. I have three children. I have been lonely in my marriage of 13 years and am recognizing I need to connect with people I click with. The farm I live on with friends is a goat dairy. I have had a 20-liter stock pot going with goat bones for the last three days. The cabin smells good! Anyway, back to your tiny house! You don't really have to use house wrap. That's a new idea of industrial culture. There are natural ways to chink between siding boards. Like clay and moss mixed together. But oil cloth would definitely work if you want to do that. It is nice to block drafts. It is also good if your building shell actually allows water vapor to move out from inside, so vapor-permeable is good. I'm excited about your siding and insulation choices! It will be beautiful! By the way, I'm a builder. I do conventional modern construction. I'm a certified building performance analyst. But also, as a teen, I attended natural building workshops. I traveled to Zimbabwe at age 16 and visited villages with earthen round houses and thatch roofs. I want to create buildings like that! And the cedar longhouse of the Northwest, and cattail mat summer houses. Thanks for reminding me of all this. Find me on facebook. Don't know if I should put my phone and email out here.