Attic Floor / Rafter Insulation and Roof Venting
I am building a new construction 2 story + walk up attic. I am In NY Zone 4, if I finish the attic during building phase I would have to install fire sprinklers and a separate water meter 🤦♂️ plus my taxes would be around a extra 5k a year.
My approved plans call for R38 Batts in attic floor joist R21 in the walls and R21 in my unfinished basement ceiling. I can not install any insulation in the rafters now because they will consider it finished area forcing me to sprinkler the house.
Later on if I decide to add R38 Batts in my 2×12 Rafters and also add a vent from my central air to condition the space . Do I still need to vent the roof being that the attic floor joist are now insulated ?
Spray foam is out of the budget I got a quote recently for 41k so that’s out of the question. I read the Cool hand Luke and other article by Joe Lstiburek already but still confused.
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