Factors attributing to bowed studs in wall framing include wood which is not fully dried when installed, damp conditions during construction, and mistakenly installing bowed studs. This is a common situation in new construction, and many of these bowed studs go unnoticed until after construction is complete. Repairing these bowed studs consists of a method known as kerfing. Kerfing is accomplished by cutting into the stud horizontally, and installing a wedge in the kerfed area once the stud is properly aligned.
- Skill level:
Things you need
- Power saw
- Wood wedge
- 4-foot straightedge
- Screw gun
- 2-inch drywall screw
- 4-foot long stud
- 2 ½-inch drywall screws
Place a mark in the centre of the concave bow side the of the stud. This marks where the kerf is made.
Set the saw to cut 2 inches deep. Do not set the saw to cut any deeper.
Cut a horizontal kerf in the stud by placing the saw in a horizontal position while cutting on the mark.
Apply pressure from the convex side of the stud and insert a wedge into the kerf.
Check the stud with a 4-foot straightedge, placing it vertically on the edge of the stud.
Secure the wedge with a 2-inch screw by angling or toenailing it through the edge of the stud and through the wedge.
Align the centre of the 4-foot stud on the centre of the kerf, and install one 2 1/2-inch screw through the 4-foot piece, into the kerfed stud, while keeping the piece flush with the kerfed stud.
Install nine more 2 1/2-inch screws, evenly spaced, into the 4-foot stud. More screws can be installed if needed.
Tips and warnings
- Setting the saw depth to 2 inches ensures stability of the stud after the kerf cut.
- Wear eye protection and saw operation guidelines.
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