Need advice on replacing rotted frame behind shoret
I'm in the early stages of starting work on a 77 17' Holiday Rambler. There is rot that I will neneed to deal with but one place I wanted to tackle first is the corner, verticle board that is directly behind the shower stall. I'm not sure how extensive it is or if I'm even going to keep the shower but should I attempt this fix from the outside? I normally it's outside in but I'm not thrilled with pulling the shower stall. There is also ceiling rot in that same corner.
To make things even more difficult the trailer isn't under cover yet except for a tarp. (this will change soon)
While we're at it, can someone tell me what is the difference between a joist, a stud, etc when it comes to TT's? Is it determined by whether they are on the floor? Verticle? Horizontal?