Feedback on Wall System Design
Please let me know what you think about my wall system, will I be good to go or should I change something?? Were building a 1560 SF slab on grade house with a hard trowel finish slab for finished floor. Climate zone 5a.
From interior -> exterior
1. plastered walls
3. rockwool r21 cavity insulation
4. zip sheathing (liquid flashed nail holes and seams)
5. 2” dupont xps rigid foam ( i know its not green, our family are Dupont XPS dealers so i get it cheap)
6. coravent rainscreen
The one thing I am considering changing is going from the 2” XPS to 2″ rockwool comfortboard 80 because rockwool is Vapor permeable. It is a little more money and a -1.6 R value compared to the 2” XPS but the vapor permeability seems like a big benefit in our climate.
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