The outcome of a Section J report depends mainly on building classification and climate zones. In cases where a commercial building is located in a very hot or cold climate zone, the minimum requirements get more strict, for example:
- In Climate Zone 8, a roof needs to achieve a Total R-value of R4.8, whereas, in Climate Zone 6, a Total R-value of R3.2 is the minimum.
- A ductwork within a conditioned space located in Climate Zone 8, needs to incorporate an insulation of not less than R2.0, whereas, in other Climate Zones, the minimum insulation requirement is R1.2.