After many hours researching online, I think I will go with screws only (without construction adhesive). I have read the same thing as Ponch37300 described. Another benefit with screws is that you can readily remove the plywood if there is something wrong in the subfloor in the future. The finished ...

Had two contractors come and they both suggested to put new (5/8 or 3/4) plywood on top of the old subfloor. It becomes very difficult to temporarily hold the wall and install new subfloor. What kind of screws or nails are used for this job? What is the typical spacing between screws or nail? (6&quo...

I'm not sure how to remove the frame temporarily to unscrew the bolt. I think this is currently the biggest challenge for this job...

Thank Greg for your clarification.
Joseph

Unfortunately, there is no joist along the wall. The wall is screwed down to the plywood. Some part of the plywood is totally rotten all the way to the wall. Should I also cut of the bolts that screw the wall to the plywood so my new subfloor can go under the wall?

Thanks,
Joseph

Greg, did you suggest to only cut to the middle of the beam that is closest to the wall? Yakima4$, I think the problem was due to our lack of cleaning of the gutter near the top of the wall so the water leaked out. Did you suggest to cut to the middle of the center beam so both old and new subfloor ...

Hi, The subfloor closer to the wall in my mobile home addition has water damage. Top view.jpg Here is the close up of the damage. Top view close up.jpg I would like to get it replaced. The subfloor is 1 1/8 plywood. I think it is tongue and groove. The subfloor is supported by three beams underneath...