Which NC building code inspection must be completed before installing drywall in a residential project?
Correct Answer
D) Insulation and rough-in inspection
NC building codes require insulation and rough-in inspection (covering electrical, plumbing, HVAC rough-ins) before drywall installation.
Why This Is the Correct Answer
The insulation and rough-in inspection (option D) covers all concealed systems — electrical rough-in, plumbing rough-in, and HVAC rough-in — as well as insulation placement. Because drywall permanently conceals these components, inspectors must verify them before they are covered. NC building codes mandate this inspection be approved before drywall can be installed.
Why the Other Options Are Wrong
Option A: Framing inspection
The framing inspection occurs earlier in the construction sequence, before insulation and rough-in work begins. It verifies structural members, not the concealed mechanical systems that drywall would hide. Passing the framing inspection alone does not authorize drywall installation.
Option B: Foundation inspection
The foundation inspection is one of the earliest inspections in a project, covering footings, foundation walls, and anchor bolts. It takes place long before any wall framing, insulation, or drywall work, so it has no bearing on the drywall installation milestone.
Option C: Final inspection
The final inspection occurs at the very end of construction after all work — including drywall, finishes, fixtures, and equipment — is complete. It cannot logically precede drywall installation; it follows it.
Memory Technique
Think of the pre-drywall inspection as the 'Cover-Up Check' — before you hide everything inside the walls, the inspector must see and approve everything: Insulation + Rough-ins. The acronym IRD (Insulation, Rough-ins, then Drywall) captures the required order.
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A residential contractor in NC wants to bid on a $125,000 project but currently holds an Intermediate license. What action must be taken?