Wall Assembly Options for Zone 6
Ok guys I have it narrowed down to two different wall assemblies that I am considering both have there pluses and minuses.
So wall one is a 2×4 wall with rockwool r15 inside and a smart vapor barrier before drywall, zip sheeting taped and sealed. Then 4” of polyiso foam on the outside to get me to about an r35. This system would only breathe to the inside but I should have enough exterior foam that the sheeting should never get cold. This wall assembly is easier to fur out because of less compression vs wall system 2 but it’s not as vapor open.
wall 2 is a 2×6 wall with rockwool r23 smart membrane before drywall then plywood or osb with delta sa for a more vapor open concept and 3” of rockwool outside to get me close to r35 outside. Positives are rockwool is vapor open and should breathe better allowing for drying of the wall assembly both ways. However I’m not getting the same insulation value on the outside which could create a problem with the wall sweating because I have more insulation inside. Also rockwool does compress and the rain screen will be a little more difficult to attach and keep straight.
I live in south east Wisconsin zone 6 these are the assemblies I’m comfortable with doing that I can afford and do most of, if not all of it, myself.
I would greatly appreciate anyone else’s feedback or experiences with either of these assemblies and what your thoughts are in dealing with my climate and these two different wall assemblies. In my mind I’m not sure that the vapor open overrides the fact that there’s less exterior insulation.
Using quality windows and doors probably Duxton.
please help me out here I’ve gotten some great info so far here this is my final step I’m about to start sending everything out for bid.
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