See links below for more information on air sealing and insulating a high performing, energy-efficient home.
https://prmodelremodel.com/3-pro-tips-insulating-foundation
https://prmodelremodel.com/vent-or-not-vent-part-2-decision
https://prmodelremodel.com/benefits-continuous-exterior-insulation
https://prmodelremodel.com/step-step-install-high-performance-cathedral-ceiling\
https://prmodelremodel.com/carbon-negative-and-powerfully-insulated-greenfiber-sanctuary