Rockboard [mineral wool] or polyiso?
I'm planning a new house. I've been thinking in terms of 2 3/4" of polyiso on the exterior of the walls. However, I'm now thinking that dense rockwool board *might* be better at least from the standpoint of the wall being able to dry to both the outside & inside. I kinow I'd be giving up some r value, but perhaps I could just up the thickness ? I'm in climate zone 4 Western NC in the mountains. Probably using zip sheating under either insulation board.
Posted Jun 12, 2014 9:08 AM ET
Edited Jun 12, 2014 10:03 AM ET
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