Wall Type Core Thickness Overall Thickness Panel Make Up Whole Wall R-Value at exterior temp of 75º Whole Wall R-Value at exterior temp of 40º Weight PSF
R-18 4″ 4 1/2″ 1/4″ Concrete, 4″ EPS, 1/4″ 18.0 20.6 7.0
R-26 6″ 6 1/2″ 1/4″ Concrete, 6″ EPS, 1/4″ 22.8 24.1 7.2
R-33 7 3/4″ 8 1/4″ 1/4″ Concrete, 7 3/4″ EPS, 1/4″ 30.1 31.8 7.6
R-40 9 3/4″ 10 1/4″ 1/4″ Concrete, 9 3/4″ EPS, 1/4″ 38.5 40.0 7.9