EPS Foam on over exterior OSB Sheathing
I am new here and I apologize if this has been asked. I am currently an Owner Builder (subbing out as I go for items such as framing, etc) and am thinking for the future of energy efficiency. My question is the following and I am not necessary looking for someone to give me the answer but links and other material that would help would be great! I am an electrical engineer so I convince myself at least that I can understand technical explanations but take it easy on me!
I am located near Pittsburgh, PA which is zone 5 on the climate chart. I currently am in the beginning process and framing has begun. My exterior walls are 2×6 with 7/16 osb sheathing followed by Tyvek House Wrap. https://www.lowes.com/pd/Tyvek-9-ft-x-150-ft-House-Wrap/3227658. The house will be sided with vertical vinyl.
I was debating whether to use closed cell spray foam on the interior but the cost is astronomical and the more and more I read was that if I add foam sheathing over my osb and house wrap I can create a thermal break which would effectively increase my homes energy in a multitude of ways for much less than spray foam just on the interior.
Is there a guideline available for this method? Do I need to use a different house wrap? I know I will need to shim out my windows and doors with 2x pressure treated material which is not an issue. I am concerned if whether or not 1.5″ of https://www.homedepot.com/p/R-Tech-1-1-2-in-x-4-ft-x-8-ft-R-5-78-Rigid-Foam-Insulation-320817/202532855#overlay is a large enough thermal break or could I incur moisture issues? The reason the 1.5 is tempting is that there is not a lot of cutting involved for the window and door trims.
Any guidance would be great or even links to others with this scenario. Most of the other links I found were from the mid 2000s and nothing was very recent.
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