Dew Point in Wall Assembly

Calculate temperature at each layer in a wall assembly to determine if condensation will occur at any interface.

Winter heating condition
°F
Winter design temperature
°F
Winter indoor RH
%
Air film + interior finish
h·ft²·°F/Btu
Cavity insulation
h·ft²·°F/Btu
Sheathing + air film
h·ft²·°F/Btu

Results

Indoor Air Dew Point-°F
Temperature at Interface 1-2-°F
Temperature at Interface 2-3-°F
Condensation Risk-
References: ASHRAE Fundamentals Ch. 26, ASHRAE 160 - Criteria for Moisture-Control Design Analysis