Vapor barrier/retarder with shiplap wall without drywall?
I am building a small cabin in Michigan’s Upper Peninsula, using standard 2X4 walls, 16″ OC and the rafters are 2X10s, 24″ OC, defining a cathedral ceiling. I’m using rain wall techniques on the exterior. The cabin will be used mostly during the Spring – Fall months although we are planning winter visits as well. Temperatures in this area of the world vary wildly, e.g., generally from -15 to 90F. A small camping trailer LP gas heater with a power vent will be installed.
My question relates to the interior walls and how they should be finished. I want to use rock wool insulation so as not to adsorb moisture and also to at least deter mice, although I am thoroughly checking to be sure there is no access to the spaces between the framing members to allow them access. I want to finish the interior walls with wood shiplap siding. Would it be acceptable to install a vapor barrier/retarder onto the insulated walls and ceiling then applying the shiplap without drywall? I have been told that drywall joints will likely crack due to large temperature changes.
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