Insulation is cut short around plumbing and leaves open voids in exterior walls. What performance issue results?
Correct Answer
C) Reduced R-value.
Voids and gaps in insulation reduce effective thermal performance.
Why This Is the Correct Answer
Voids and gaps in insulation reduce effective thermal performance.
Why the Other Options Are Wrong
Option A: Thermal fit.
Thermal fit. addresses a neighboring field issue, but not the condition or method control required for thermal insulation.
Option B: Valley flashing.
Valley flashing. addresses a neighboring field issue, but not the condition or method control required for thermal insulation.
Option D: Water control.
Water control. addresses a neighboring field issue, but not the condition or method control required for thermal insulation.
Memory Technique
Thermal Insulation method for Checking Wall: condition first, tool second.
Reference Hint
Study anchor (closed-book): memorize Thermal insulation from California Energy Code, California Code of Regulations Title 24; CSLB. / Title 24 California Energy Code insulation installation quality concepts; know the rule or calculation trigger without relying on exam-room lookup.
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