What is the U-value of the assembly in Question?
Question
Draw a plan of the following wall assembly and then determine its R-value. Starting from the outside face of the wall, the assembly consists of the following layers:
4-in. nominal (3⅝-in. actual) brick veneer
2-in. air space (cavity)
0.75-in.-thick extruded polystyrene sheathing
2 × 4 studs with 3.5-in.-thick fiberglass insulation
0.5-in.-thick gypsum wallboard
(Note: In calculating the total R-value, ignore the presence of wood studs and assume that the entire layer consists of fiberglass insulation.)
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