Is the effective R-value of the following two walls the same or different? Explain.
(a) A 4-in.-thick metal stud wall with studs spaced 24 in. on center and 4-in-thick fiberglass insulation
between studs.
(b) A 4-in.-thick metal stud wall with studs spaced 12 in. on center and 4-in-thick fiberglass insulation
between studs.
Wall (a) will have a higher effective R-value than that of wall (b) because wall (b) has a greater amount of thermal bridging because of closer spacing of metal studs.
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