A cavity masonry wall is constructed of 4 in face brick, 11⁄2 in hollow (air) cavity, 4 in standard weight concrete block, 31⁄2 in fiberglass batt insulation, and 5⁄8 in gypsum wallboard.
a. Determine the Rt-value and U-factor for this construction assembly under winter conditions.
b. Determine the Rt-value and U-factor for this construction assembly under summer conditions.