The Perfect Wall is an approach to roof, wall, and floor assemblies that sheilds the structure from the elements. In a nutshell, the water, air, vapor, and thermal control layers are connected to themselves, providing the best separation between the interior of a building and the weather outside. In this example we should how this could be applied to a tiny house.
Joseph Lstiburek from the Building Science Corporation first coined the perfect wall. We are not affiliated with Joe of BSC.