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Pre-drywall
Verify systems while the walls are still open.
Framing, ducts, wiring, and plumbing are visible for a short window.
What matters right now
This is your one clear look behind the walls — verify electrical, plumbing, HVAC, and insulation before anything is covered.
Three things to focus on
Three questions to ask
- “How were the framing and rough-in items from my inspection resolved?”
- “Who signs off on corrections before insulation and drywall?”
- “Can I see the HVAC design and confirm the equipment installed matches it?”
Three things to check
- Electrical: every outlet, switch, and low-voltage run you paid for is present and in the right room.
- Plumbing and HVAC: supply and drain lines supported, ducts sealed and connected, returns present.
- Insulation and air sealing: penetrations sealed, no compressed or missing batts, exterior sheathing taped.
One common mistake
Skipping the pre-drywall walkthroughThis is your only clear look at framing, wiring, plumbing, and HVAC.Recommended next step
Walk the home room by room with the verification list.
Open the pre-drywall checklistFinished with this stage?
Ask New Construction Intelligence™
What are you deciding right now?
Guided by NCI content — stages, checklists, mistakes, and decision paths. Educational guidance, not inspection, legal, engineering, or lending advice.
Test Drive covers three decisions today. More paths are being authored stage by stage.
Checklist
Pre-drywall walkthrough checklist
Your one look inside the walls — framing, mechanicals, insulation, air sealing, and the photos you will want years from now.
Framing and structure
Mechanicals
Envelope and air sealing
Your permanent record
10 items left before you can mark this reviewed.
Decision Engine™
Decisions that matter now
Decide what you will document
Photograph wall cavities and mechanical runs — you will want them years from now.
Read the full explanation
Mistakes to avoid
- Touring without a list
- Skipping photos of every wall before drywall
Million Dollar Mistakes™ here
All mistakesSigning without your own inspection rights
If the contract does not allow your inspector, the answer later is no.
Cost if ignored · $5k–$40k in defects found after closing
Spending the option budget on finishes first
Finishes can be replaced later. The envelope cannot.
Cost if ignored · $1,200–$2,400 a year in comfort and utility cost
Skipping the pre-drywall walkthrough
It is the last day you can see how your house was actually built.
Cost if ignored · $3k–$25k in hidden defects
Letting the HVAC be sized by rule of thumb
Bigger equipment is not better comfort — it is short cycles and sticky air.
Cost if ignored · $600–$1,500 a year, plus early equipment wear
Where the build is
- In the wallsMechanicalHVAC ducts, wiring, and plumbing runs are installed in open walls.2–4 weeks
- In the wallsInsulationAir sealing and insulation are installed in every cavity, then verified before drywall covers them. This is the last moment the envelope is visible, and the single largest permanent influence on comfort and utility cost.3–7 days
Learn for this stage
Air sealing
Sealing the holes in your home's envelope does more for comfort than adding insulation on top of leaks.
- IMPImportance: 5 of 5
- DIFConsumer difficulty: 4 of 5
- COSTCost impact: 3 of 5
- COMFComfort impact: 5 of 5
- INSPInspection priority: 5 of 5
Insulation upgrades
The builder's upgraded envelope package is usually the most consequential option on the sheet — and the hardest to judge on price alone.
- IMPImportance: 5 of 5
- DIFConsumer difficulty: 5 of 5
- COSTCost impact: 5 of 5
- COMFComfort impact: 5 of 5
- INSPInspection priority: 4 of 5
HVAC sizing
An oversized system short-cycles, leaves humidity behind, and feels worse than a correctly sized one.
- IMPImportance: 4 of 5
- DIFConsumer difficulty: 5 of 5
- COSTCost impact: 3 of 5
- COMFComfort impact: 5 of 5
- INSPInspection priority: 3 of 5
What’s next
Drywall, finishes, and the final walkthrough.
Continue to Final walkthrough