Insulative system cost/benefit question
I’ll start by saying, this is my first ever post to GBA and want to express my gratitude to the building science enthusiasts and experts that maintain this site and answer questions.
I am a licensed builder in the Panhandle of Florida and have a tiny home cottage build that I’m to be starting in January. My first new build since getting my license in June. The client is budget conscious and doesn’t really see the benefit in putting extra money into a perfectly built passive structure so I’m attempting to put together the best cost/benefit plan for the envelope possible.
My question is basically; would it be better to spend extra money on a higher grade insulation (open cell foam) for the envelope and have a standard sheathing detail (OSB and Homewrap). OR, a cheaper wall insulation such as kraft faced fiberglass and install ZIP-R 15/16 so there’s at least a minimal attempt to thermally break the system? Any advice is appreciated
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