Insulating a Post-and-Beam Roof
I will be building a Post and Beam house in climate zone 7A this summer. Attached is a picture of what the interior will look like. I have read many posts warning about air leaking out causing condensation and rot if not careful.
My plan is to lay down T/G pine on top of the purlins. To create a complete seal I am using SIGA Majvest 500 SA acrylic membrane on the pine boards. Next will be 2 layers of 4″ Nailbase insulation panels. The joints will be taped and staggered so no air can get by. Both panels will be screwed into the purlins. Tyvek then goes on top of the OSB side of the Nailbase panel. Next 1″ fur strips to create a vented roof with plywood and finally steel to finish this of.
All suggestions welcome to make this foolproof
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