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What is the best way to do interior and exterior insulation in a cold climate?

Joshua Eckhaus Nov. 17, 2022

I am planning a post and beam home build in Southern Colorado zone 7.  Looking for help with clarification of how to layer wall insulation with water barrier and vapour barrier.  Leaning towards rockwool as we are in a extreme fire zone.  From the inside out I am thinking Drywall, Vapour barrier, rockwool, sheathing, 2" rockwool, tyvek, rainscreen, siding.  Is this correct? It also appears there are a few rockwool products that can be used for exterior insulation and cavity insulation.  Is one better then the others for my location and build?  Thank you.  

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