What to Check Before Your Drywall Goes Up: A Homeowner’s Checklist
Once the drywall screws start turning, your access to the skeleton of your house disappears. Mistakes hidden behind gypsum board become expensive surprises that require cutting holes, patching, and repainting. Before your contractor hangs the first sheet, walk through each room with this checklist. Most builders allow a pre-drywall inspection, and even if you are renovating yourself, this pause saves thousands in rework.
Electrical and Plumbing Rough-Ins
Start with the walls that will be hardest to access later. Verify that outlet and switch boxes are at the correct height and location according to your electrical plan. Kitchen islands need dedicated circuits for outlets, and bathrooms require GFCI protection. Look for properly stapled cables that run through the center of studs, not near the edges where drywall screws could pierce them.
For plumbing, confirm that shower valve rough-ins sit at the right depth behind the finished tile surface. Check that drain pipes have the correct slope and that water supply lines are pressurized and holding without leaks. Run your hand along copper pipes to feel for rough spots that could wear holes over time, and ensure plastic pipes have adequate support brackets to prevent sagging.
Framing and Blocking
Studs should be plumb and spaced either 16 or 24 inches on center. Check for bowed lumber that will create wavy walls. More importantly, look for missing blocking—the horizontal lumber pieces that provide backing for towel bars, toilet paper holders, grab bars, and heavy mirrors. Without solid wood behind the drywall, these fixtures will eventually pull out of the wall.
Verify that recessed medicine cabinets and niche shelves have been framed to the exact dimensions of the finished units. Confirm that pocket door frames are square and that sliding door hardware mounting blocks are secure.
Insulation and Air Sealing
Inspect the type and placement of insulation. Exterior walls need full cavity fill without compression or gaps. Pay special attention to corners and headers where insulation is often missing. Look for spray foam around window and door rough openings, electrical penetrations, and top plates where the wall meets the ceiling. These air sealing details prevent drafts and moisture issues that no amount of interior caulking can fix later.
HVAC and Ventilation
Ensure ductwork is properly supported and not crushed or kinked. Bathroom exhaust fans need dedicated ductwork that terminates outside, not into the attic. Confirm that return air pathways are clear and that fireplace chimneys have proper clearance from combustibles. If you are adding a range hood, verify that the duct route to the exterior is framed and unobstructed.
Documentation
Take photos of every wall, floor, and ceiling cavity before coverage. Capture images of pipe runs, wire routes, and ductwork from multiple angles. Save these with the room name and date. When you hang a picture or run a new cable five years from now, these images prevent you from drilling into plumbing or severing electrical lines.
Walk through with your contractor to confirm any deviations from the plan are intentional and documented. Only after this inspection should the drywall crew begin their work.
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