
This is the core under the floor. As you can see it's all rotten.
There is core under the stringers too. After the core is out it should look like this.

If you don't plan on redoing the core I would at least drill some 1/8" holes in the fiberglass in the pad area and some other places to check the core. If it's ok then you can just glass over the holes. I'm not a expert by any means but I would bet the core is wet if not rotted.
Looks good so far
