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The pre-drywall inspection is the one time the inside of the walls can be seen: after framing, roofing, windows, and the electrical, plumbing, and HVAC rough-in, after the municipal rough inspections, and before insulation and drywall. You can check whether the ducts connect, the bath fans go outside, the framing is straight, and the outlets sit where the plan says. Better still, you can photograph every wall, so for the life of the house you know what is behind it.
Most buyers walk it with the builder's superintendent. Many bring an independent inspector, which is the better arrangement; this post is the buyer's checklist for either.
When does it happen, and how do you arrange it?
Ask, early in construction, for the pre-drywall walk to be a scheduled milestone with a date, and for permission to bring an inspector. The window is short: insulation and drywall often follow the rough inspections by days. Ask the superintendent to hold drywall until you have walked and until any items you raise are corrected and confirmed. Get that in writing, or at least in an email.
What do you need?
The plans and your selection sheet, a camera with plenty of storage, a tape measure, a level, a flashlight, the printed checklist below, and, if you can arrange it, an independent inspector. The camera matters most: the photos you take today are the only record of the wiring, plumbing, and framing the house will ever have.
- The plans (floor plan, electrical plan if there is one) and your selection sheet
- A camera with plenty of storage; a phone is fine
- A tape measure, a level, and a flashlight
- The checklist below, printed
- An independent inspector, if you can
What is on the checklist?
The checklist covers framing and structure, the electrical rough-in, the plumbing rough-in, the HVAC rough-in, the envelope, and the insulation prep, room by room in plan order. Walk every room in the same order as the plans, and photograph every wall of every room before you look at anything in detail; the photos are the part that outlasts the inspection.
Framing and structure
- Walls plumb and straight; sight down each one. Studs not bowed, split, or notched heavily for pipes.
- Headers over windows and doors in place. Window and door rough openings square.
- Floor joists and the subfloor: no cut or notched joists without a repair, no sagging, subfloor glued and screwed with no soft spots.
- Fire blocking at the top of walls and around chases where pipes and ducts pass between floors.
- Straps, hangers, and hold-downs where the plans call for them (especially in wind and seismic areas).
- Nail plates (metal shields) on studs wherever a wire or pipe passes within reach of a drywall screw.
Electrical rough-in
- Outlet and switch boxes where the plan puts them, at consistent heights, and where you asked for extras.
- Boxes for ceiling fans rated for fans, where you plan fans.
- Wire runs stapled neatly, not sagging or pinched, and protected with nail plates.
- GFCI and AFCI protection locations noted; the panel location; the routes for future needs (a conduit to the attic, an EV outlet in the garage) if you asked for them.
- Low-voltage: data, cable, speaker, and doorbell runs where you wanted them.
Plumbing rough-in
- Supply and drain lines to every fixture on the plan, capped and pressure-tested (ask for the test result).
- Pipes in exterior walls insulated or moved to interior walls in cold climates; note any that are in exterior walls for the freeze list later.
- Drain slopes visible and consistent; vents running up.
- Tub and shower units set and protected; the water heater and softener locations and their drains.
- Hose bib locations and interior shutoff locations.
HVAC rough-in
- Every duct connected at both ends and sealed with mastic or foil tape, not cloth duct tape; no crushed or kinked flex duct; supports so the flex does not sag.
- A supply register in every room the plan shows and a return path for every bedroom.
- Bath fan ducts and the range hood duct running to a roof or wall cap, not ending in the attic. The attic check in year one is where this is found if it is missed now.
- The dryer vent route: short, rigid or semi-rigid metal, to the outside.
- The condensate drain route for the air handler.
Envelope
- Windows and doors flashed correctly: the house wrap lapped over the head flashing, sill pans or sill flashing under the windows.
- House wrap taped at seams, no tears.
- Roof: underlayment, flashing at penetrations and walls, drip edge.
- Exterior penetrations (hose bibs, vents, cables) sealed.
Insulation prep
- Baffles at the eaves so insulation will not block the soffit vents.
- Air sealing of the top plates and penetrations if the builder's spec includes it.
Photograph more than you think you need. Every wall, from a consistent spot, with the room name spoken into the video or written on a card in the frame. Then the ceiling of every room and the floor of every room. Years later, when you want to hang a heavy mirror, run a cable, or find a leak, the photo of the studs and pipes behind that wall is the answer. The inspection finds problems; the photos are a permanent record, and they belong in the home record the day they are taken.
What happens after the walk?
Send the builder a written list of items with photos the same day, and ask for written confirmation of each correction before drywall. Ask to see the corrections if you can. Then file the list, the responses, and the photos with the closing documents; along with the punch list, they are the record of what the house was on delivery. If something behind the walls fails later, this is the evidence of whether it was built right, and the warranty timeline explains why that date matters.
Common questions
Will the builder let me do a pre-drywall walk?
Most production builders schedule one as a standard step and many welcome an independent inspector at it; the purchase contract or the builder's process document says. If it is not offered, ask for it in writing early in construction. A builder who refuses any access before drywall is telling you something.
Is an independent pre-drywall inspection worth paying for?
For most buyers, yes. The inspector sees things a buyer cannot judge (nail plates, strapping, duct connections, flashing details) and puts them in writing for the builder to correct before the walls close. The municipal inspections check code minimums; the builder's own checks work for the builder.
What if I find something wrong?
Report it in writing to the builder's representative the same day, with the photo, and ask for written confirmation that it was corrected before drywall. Then check at the next visit. A rough-in defect fixed before drywall costs the builder an hour; the same defect found in year two costs everyone.
What should you do next?
If you are under contract on a new build, email the builder today to get the pre-drywall walk on the schedule with a date. If the walls are already closed, the first-year attic and fan checks are where the same problems are found next.