Problem: Other types of drywall cracking.
Cause: Corner bead pulling away from framing.
Differential shrinkage, especially at beams or headers can cause cracking along the corner-bead edge as shown in Figure 61.
Figure 61 - Drywall Corner-Bead Cracking
Solutions:
- Nail corner bead at 4 inches (100 mm) rather than at the usually recommended 6 inches (150 mm). Crimping alone is not sufficient.
- Don't extend corner bead to the subfloor. Leave a 1/2 inch (13 mm) gap.
- Avoid flattening the corner bead when fastening. Ensure a sufficiently high bead for adequate cover with finishing compound.
- In highly visible areas, such as the opening between living and dining rooms, some builders omit corner bead and install a wood trim or molding.