The term sister stud refers to a secondary stud that is installed alongside an existing stud it is usually used to reinforce a stud that has been damaged or is bowed in a manner that compromises its load bearing capacity.
Straighten existing bathroom wall by cutting bowed studs.
Next adjust the stud so that it s fully straight.
If you are dealing with slight warps or bows you have the option of using cardboard shims along the face of the wall studs.
Essentially the two straight adjacent studs will help to hold the stud in an upright straight position.
Apply force to the stud straightening it.
Gary the fix is real easy.
Cut the stud at the apex of the curve or the portion that most juts outward from the center of the stud.
As you nail the cuts will close and the board will straighten.
So for your non load bearing walls with bowed studs cut a notch in the bad stud and then install a horizontal 2 4 brace to pull the stud back to a straight position.
When you ve located the site of the bow or curve in the stud use your hand saw to carefully cut about an inch or an inch and a half into the curve.
I would start by plumbing each corners stud then sting a line at the top from each corner stud and use this as a guide for susequent timbers.
Toenail a 16d nail through each kerf.
Dealing with bowed walls on your building projects can be a huge hassle.
In the bowed area with a circular saw.
Expect some relaxation movement here as well.
Slip a single shim into the triangular kerf section that opened up when you straightened the stud.
Just fix timber to the side of the existng studs to plumb up the wall.
The cut should be made on the concave side of the bowed area.
If you have a few severely bowed out studs that are more than 1 2 in.
For example sister joists are sometimes installed to increase the load bearing capacity of a floor so it.
If you ve cut the concave inset side of the stud.
Sistering can also be done to reinforce floor joists or rafters.
Step 3 straighten and shim the stud.
With a handsaw or circular saw cut about two inches into the stud at roughly the midpoint of the bow.
The goal is to bring the low points to the high points with shims.
It s not unheard of to do this more than once on a severely bowed stud say at 1 3 and 2 3 of its length.
For the pieces that are bowed usually you can fix this by cutting blocking and fastening it between the studs like you mentioned but you will need to put a few in because if you just put it between the crooked one and the one right next to it generally you will just pull the other one out of place as well.