[Wanderman]

I HIGHLY suggest everyone checks their engine bay ceilings!If the fabric diamond stitched cover hadn't fallen down, I would never had seen the extent of the water damage. If untreated, it very well could have propagated to the other side of the tub/shower as well as the main floor (granite) of the rear bathroom. Thankfully, it appears I caught it in time.

I am replacing using a much better quality of plywood with superior water resistance. The OSB that newell used really isn't the right type for this area. They told me it was marine plywood... it clearly wasn't. I wonder what else isn't?

In the photos, you can clearly see the "ledge" that this roughly square plywood/foam/plywood sits on. It was put in from the top, them the other pieces were nailed to it, again, from the top. As long as I can slide the new sandwich in there and secureit properly, it should be fine. Removing the bathroom flooring and tub is not something I'd like to do....ever!