I'm pretty sure it wasn't covered beings it was filthy when I bought it...I knocked on everything I could reach under the floor like cross braces and such and it's all solid.
They were at were my finger is pointing. I took the rounds of what I drilled out for the new ones, wich was dry. And glued them into the old holes. 4 coats of fiberglass and matting. Then rubber sealant. Inside the boat i used 5200 to seal the spots
There isn't any foam that I can see through the deck ports and nothing looks rotten or anything. I'm taking it to the water today and ill take a picture of the back once it's floating and post it. Maybe it's just my brain thinking it's low riding