This region roughly corresponds to NCC/BCA Climate Zone 1 and contains the capital city of Darwin, as well as the population centres of North Queensland. The vapour drive is inward.
External Wall Wraps for the Wet Tropics (vapour drive inward) are selected based on vapour barrier performance, with the highest vapour resistance preferred.
Condensation Risk in Walls – Hygrothermal Analysis
Interpreting condensation risk
When the temperature is lower than the dew point condensation will form. When the Temperature profile and Dew Point lines intersect this is the location point of the condensation in the wall.