Stringers, is the juice worth the squeeze?

[MR nova @#25]

I just removed the cabin floor from a 1985 Tiara 3100, because it was soft. 1/2 plywood glass on top bare plywood underneath. My plan was to remove the plywood stringers and bulkhead and redo it all in coosa. After I remove the bulkheads, I saw the stringers are literally an upside down hollow box with glass over the top.
When you hammer on the stringers there's no dead spots or delamination. I ran a camera down the length of the stringers the woods black but its intact. My concern is what benefit will I gain by removing solid stringers from a cabin and replacing them??

 

[Scott Danforth]

do some test drills. black is usually black mold.

not sure coosa is worth the squeeze. simple plywood lasted over 45 years.

 

[MikeSchinlaub]

I agree coosa isn't worth it. $400 a sheet, and either do every scrap of wood structure or don't bother.

 

[Texasmark]

I just removed the cabin floor from a 1985 Tiara 3100, because it was soft. 1/2 plywood glass on top bare plywood underneath. My plan was to remove the plywood stringers and bulkhead and redo it all in coosa. After I remove the bulkheads, I saw the stringers are literally an upside down hollow box with glass over the top.
When you hammer on the stringers there's no dead spots or delamination. I ran a camera down the length of the stringers the woods black but its intact. My concern is what benefit will I gain by removing solid stringers from a cabin and replacing them??View attachment 416491

The fiberglass mat is surely covering wood stringers. If the resin has completely sealed the stringer when the mat was installed and hasn't been damaged, then I'd say you are good to go. As Scott mentioned a few inspection holes wouldn't hurt......ensure you seal them up good when finished looking.