Apprentice hung a bedroom and I'm walking it.

Yes, callbacks are likely. Here's why and what to fix:

Immediate fixes needed:

• Missed studs: Remove screws that aren't in studs and properly fasten to framing. Loose screws will pop or fall out.
• Torn paper (10%): These are stress points. Either remove and relocate, or if close enough to stud, drive properly. Torn paper compromises holding power.
• Angled screws: Not inherently wrong (toe-screwing into stud edge is acceptable), but ensure they're actually in wood and not just paper.

Code reference: IRC R703.4 requires fasteners to "penetrate framing members" - missed studs violate this.

What will fail:

• Loose/missing screws → pops, cracks, potential drywall damage
• Torn paper areas → screw heads will dimple or pull through under stress
• Angled screws not in stud → same failure modes

Walk it again after corrections. Check:

• All screws hit solid framing
• No torn or lifted paper
• Consistent 8" spacing (acceptable per most specs)
• Screw heads properly set (not over-driven)

Bottom line: Fix the missed studs and torn paper now. The angled screws are fine if they're in wood. You'll get callbacks on the loose ones within weeks/months when the drywall shifts or humidity changes.

Tell your apprentice: "Every screw must bite wood. If you can see the paper tearing, it's not holding."

Yes, callbacks are likely. You have three distinct defects that violate IRC R702.3.5 / ASTM C840 and will show up under critical lighting or paint.

1. Missed studs (Critical). Screws not in framing provide zero holding power. The panel is hanging on adjacent fasteners only. Every missed screw must be removed, the hole mudded, and a new screw driven into the stud. Do not leave them.

2. Torn face paper (Defect). IRC R702.3.5 requires screws driven so the head is slightly below the surface without breaking the paper. Broken paper destroys the taper’s ability to conceal the head and creates a weak spot for cracking/popping. Cut out the damaged paper cleanly with a utility knife, mud the crater, and add a new screw 1.5" away into solid stud.

*3. 8" spacing on walls (Non-compliant for ceilings, acceptable for walls if studs are 16" OC).* IRC Table R702.3.5 allows 16" OC screws on walls (studs 16" OC). 8" OC is overkill but not a code violation. However, it increases the odds of hits/misses and torn paper. Verify stud spacing; if 24" OC, max screw spacing is 12" OC.

Angled screws: If the head seats flush without tearing paper, it’s usually cosmetic. If the angle prevented proper seating or hit the stud edge, treat as a miss.

Walk fix list:

1. Remove all missed screws. Patch holes.
2. Repair all torn paper (cut, mud, re-screw adjacent).
3. Check edges/corners: Screws must be ≥3/8" from bound edges, ≥1/2" from cut ends.
4. Re-scan with a strong side light before mudding.

Bottom line: Don't mud over this. Fix the substrate now or own the nail pops and shadow lines later.