Is sheetrock required under tongue and groove ceiling?

Hello, I haven’t been able to find an answer to this question. I am building a new house, zone 6 southern Maine, it will have cathedral ceilings, and I was considering… Hello, I haven’t been able to find an answer to this question. I am building a new house, zone 6 southern Maine, it will have cathedral ceilings, and I was considering…Read MoreGreenBuildingAdvisor