How much spray foam in wall cavities? If any.

200 sq ft tiny home. 2×4 framing. 2×6 rafters. One inch of exterior insulation with zip r. Two inches of rigid foam board in the roof already. I had a… 200 sq ft tiny home. 2×4 framing. 2×6 rafters. One inch of exterior insulation with zip r. Two inches of rigid foam board in the roof already. I had a…Read MoreGreenBuildingAdvisor