Generally that's how it goes man - you shut down badly. 6R /inch. Polysterene is crap imo - unless you are buying exterior grade like for under stucco, it shrinks badly. Kinda a fire hazard.Yeah, no.
This specific kit gets you to about R4, as expanded polystyrene is about R4 per inch of thickness.
But go on with your bad self. I'm sure you've got a long post queued up about how I'm wrong and you're right and I don't know shit about shit.
https://www.homedepot.com/p/Super-T...-4-ft-x-8-ft-Foam-Insulation-267642/100322372
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