Staggering seams of stone wool insulation
I have seen advice the stagger the seams of layers of exterior foam insulation. Is this necessary/helpful for Rockwool Comfortboard 80? Or is the insulation so air permeable it would not make a difference?
I am planning to use two 1.5″ layers on the exterior of my wall sheathing (although I may be able to source 3″, which would obviously save some labour.)
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