I just bought a house built in 1930. The previous owners had a crack in the shower. I need to know how to replace the stud that holds up that wall as it is now rotten from water damage. The drywall is also rotten. The wall is not load bearing. And there's also water damage in the floor. My main concern at the moment is the stud. Also it should be noted that I stopped the leak for the time being.
Cut out the rotten drywall then use a reciprocating saw to cut out the old stud and replace with a new one. If it isn't load bearing and its only one stud this is easy. You may plan on also cutting out a portion of you bottom plate and replacing it if it also rotten.