I am new here and I am taking on a tiling project in my bathroom. I tore up the existing tile and found a rotted floor underneath the toilet. This stuff was just crumbling apart so I decided to take the subfloor out. Due to pipes and a wall, the closest joist to the wall is far out of reach for me to get to. My question is how would I go about increasing the "structural integrity" of the new subfloor if I cannot attach it to the joist that is sitting under the wall? I was thinking that I could place some cross beams, but would that make the new floor stable and safe enough for the new tile and toilet? Thank you in advance for any advice!
If you use a Toe Kick saw you can cut that floor out right along the bottom plates.
I'd use 3/4" Advantec T&G as a subfloor not plywood, with constrution on the tops of the floor joist for added streingth.
Advantec is more moisture resistant then plywood.