Drywall Finishing Inspection Checklist: After Boarding, After Taping, After Primer and After Paint, What to Look at With a Light Before Each Cheque

Drywall, Taping & Painting

The Finishing Inspection Checklist: Four Walks, One Work Light, and the Fifteen Minutes That Stop the Drywaller and the Painter Blaming Each Other

I inspect the inside of a house four times between the last sheet going up and the last coat going on, and each walk takes less time than the argument it prevents. Boarding, before the taper starts. Taping, before the primer. Primer, before the finish coats. Paint, before the last cheque. The tool is a work light held flat against the surface, in a dark room, and then the same surface from across the room under the lights the room will actually have. The second look matters as much as the first, because the standard is the room’s lighting, not the torch. Here is each walk, in order.

Finish levels are judged against Gypsum Association GA-214 under the intended lighting. That sentence is your defence against a contractor and your restraint against yourself.

Walk 1: after boarding, before taping

  • Screws: heads just below the paper, paper not broken. Run a knife over the field; any screw that catches is proud and will pop. Spacing about 12 in. in the field, 8 in. at edges, closer on ceilings.
  • Joints: tapered edges together, butt joints staggered and not lined up with a door or window corner (that is where cracks start). Gaps over 1/4 in. get prefilled with setting compound, not bridged with tape.
  • Ceilings: board across the framing, no screws within 16 in. of interior walls under a truss roof. Why.
  • Corners: board not overhanging or short at outside corners; inside corners not forced together so tight they buckle.
  • Damage: broken corners, crushed edges, paper torn off by a screw gun. Mark them; the taper will either fix or float them, and should price it now.
  • Boxes and openings: cut tight to electrical boxes (a gap over 1/8 in. is a code issue and a plaster ring). Pot light holes to size.
  • Board type: moisture-resistant where the plan says, Type X where the garage separation needs it, ceiling board or 5/8 on 24-in. framing. Check the stamp on an offcut.

Walk 2: after taping and sanding, before primer

This is the one that matters most, and it has to happen while the taper is still on the job. Dark room, work light flat to the wall, then room lights on and look from the doorway.

  • The level you paid for: three coats on every joint and fastener for Level 4; a skim over everything for Level 5. You can see a skim coat: the whole surface is compound-coloured, no paper showing. The levels.
  • Ridges and humps: run your hand along every joint. A butt joint should be a gentle swell 2 ft wide you cannot see under room light.
  • Bubbles: press along the tape lines. A loose spot gives. Cut and redo, not paint over.
  • Corners: sight down every inside corner from one end with the light at the other. Straight, sharp, no cracks. Outside corners: bead fully coated, no bare metal edge, no dents.
  • Sanding: no scratches from coarse paper, no fuzzed paper from oversanding (it flashes under paint), no compound left on the field.
  • Screw dimples: three coats, flat, not a dish.
  • Dust: the walls wiped or vacuumed. Primer over dust peels.
  • Write it down: room, wall, defect, with a piece of blue tape on each. Hand the list to the taper and the 10% holdback waits for it.

Walk 3: after primer, before finish coats

Primer is the honest coat. Everything the compound hid shows now, and the taper should still be reachable. One more pass with the light.

  • Was it primer? A proper drywall primer, PVA or high-build, not paint-and-primer-in-one. Ask for the can. Why.
  • Flashing already: if joints show as sheen differences under primer, the primer was thinned or the wrong product. Another coat of the right one.
  • Defects revealed: ridges, pinholes, scratches, a bubble you missed. Taper fixes, painter re-primes the spot. This is the handoff the contract named. Who fixes what.
  • Coverage: no bare board, no thin patches.

Walk 4: after paint, before the last cheque

  • Coverage: two full coats; no primer showing through at corners and edges; the colour even across the wall.
  • Cut lines: straight at the ceiling and the trim; no wall colour on the ceiling, no ceiling white on the wall. A wobbling line is a painter in a hurry.
  • Roller marks and lap marks: stripes down the wall, a different texture at the edges, visible at an angle. What causes them.
  • Holidays and drips: missed spots, runs on the trim, a drip on the baseboard.
  • Sheen: consistent; touch-ups invisible under angled light. A touch-up that shows is a wall to repaint.
  • Trim and doors: caulked, filled, no brush marks you can feel, hinges and hardware clean.
  • Cleanup: floors, fixtures, windows, switch plates back on. The leftover paint labelled by room and left with you.
What is not a defect: texture difference at Level 4 visible only under the torch and invisible from across the room. The standard says intended lighting. Be fair, and be firm about the rest.

Questions people ask

How do you inspect drywall before painting?

In a dark room with a work light held flat against the surface, then under the room’s own lighting from the doorway. Hand along every joint, eye down every corner, press on the tape lines, check the screw dimples, and list every defect with blue tape before the primer goes on.

What drywall imperfections are acceptable?

At Level 4, slight texture differences between compound and paper that show under a torch but not under normal room light. Not acceptable: ridges, humps, bubbles, visible tape, cracked corners, scratches or defects you can see from across the room.

Who inspects the drywall in a new house?

The building inspector does not; he inspects the framing and insulation before it. The builder or the homeowner inspects the finish, or nobody does. Put the inspection in the contract and do it yourself with the list above.

When should I pay the drywall contractor?

A deposit for materials, a progress payment after boarding and after taping, and 10% held until the primer has gone on and the defects it showed are fixed. The Construction Act holdback supports this on a contract of any size.

Want a second pair of eyes?

If you have photos of walls you are not sure about, the $99 review covers a defect read as well as quotes. The contract checklist puts these four walks into the agreement before anyone starts.

The contract checklistAll the taping guides

Sources and further reading

  • Gypsum Association GA-214, Levels of Finish: the standard every “Level 4” and “Level 5” on a quote is supposed to mean. Free summary on the Gypsum Association site.
  • Gypsum Association construction standards: GA-216 application and finishing (the hanger’s bible: fastener spacing, ceiling framing limits, joint treatment) and GA-600 fire resistance design manual, with the free downloads.
  • Tarion warranty coverage: what a new-home warranty covers for drywall cracks, nail pops and paint in year one and year two, and what it does not.