R-60 Attic Insulation in Utah — Worth It or Overkill?
Why code charts and real-world savings diverge, and how diminishing returns interact with rebates and air leakage.
Code and program tables push high attic R-values because vented attics lose heat through both conduction and air movement. Once major leaks are sealed, additional R-value yields smaller marginal therms — but rebates sometimes pay for the jump anyway.
We model payback with your fuel prices and existing R-level. If you are at R-19, moving toward high R-40s or R-60 is usually meaningful. If you are already at R-38 and leaky, sealing beats another inch of fluff.