What To Check During a Pre-Drywall Walkthrough

The frame is up, wiring is in, and the walls are still open. This walkthrough is your best—and maybe only—chance to catch issues before they’re covered up. Missed outlet placements, misaligned vents, or poor framing can turn into costly headaches after drywall goes in. Here’s what to check during a pre-drywall walkthrough.

Electrical Layout and Boxes

Room by room, confirm that all outlets, switch boxes, and fixture placements match your signed-off plans. This is especially important in kitchens, home offices, and media spaces. If something’s in the wrong spot, request changes before insulation and drywall begin.

You’ll also want to confirm outlet heights and spacing. While local code will dictate minimums, this is your chance to tailor things to how you’ll use the space.

Plumbing and Shut-Offs

Every bathroom, kitchen, and laundry area should have hot and cold lines, drains, and vent stacks in the right place. When something seems off, speak up. Moving plumbing later is disruptive and expensive.

Take a moment to locate the main water shut-off valve and ensure it’s easily accessible. You’ll want quick access in case of future leaks or repairs.

HVAC Ducts and Vents

Walk through each room and look for air returns and supply vents. Make sure returns or vents are clear of framing and that each room has proper airflow coverage. Misplaced or missing vents can affect comfort and energy efficiency.

Check ductwork for tight seals and proper routing. Crimped or bent ducts can restrict airflow, and now is the time to correct them.

Framing Around Openings

Look closely at doors and window frames. Misaligned framing may seem minor now, but it can cause sticky doors or crooked trim after installation.

If you’re planning for features like towel bars, grab rails, or wall-mounted TVs, ask whether blocking has been installed in those spots. It’s much easier to add solid backing at this stage of the process than after.

Insulation Prep and Backing Rods

Before adding insulation, confirm that they’ll use the right type in exterior walls, interior partitions, and ceilings. Fiberglass, foam, or cellulose each serve different purposes depending on your location.

Now’s also a good time to ask about the differences between open- and closed-cell backing rods. These materials are sometimes used behind sealants, and proper use ensures long-term durability and airtightness.

Future Access and Utility Planning

If you’re planning to hardwire internet throughout the home, confirm the routing of Ethernet cables before sealing the walls. Locations like bedrooms, home offices, and entertainment areas are common choices.

Also, ask about access to shut-offs, valves, or cables behind appliances and built-ins. Confirm these won’t get buried behind drywall without a plan for future servicing.

Bring Backup and Take Photos

What to check during a pre-drywall walkthrough isn’t just about what you see; it’s also about what you remember. Take clear, labelled photos of each wall and ceiling before they’re sealed up. You’ll thank yourself later when you need to hang shelves, troubleshoot wiring, or plan upgrades.

And while builders may offer an inspector, consider hiring your own. Find a third-party professional who’ll work for you, not the contractor.

Image Credentials: By karamysh, 101737607