I’m gonna open up the old floor today, The previous on it put plywood on top of the rotted floor. It’s a 1986chawk, not sure if they used flotation foam
One of the braces that come up from the bottom of the boat through the transom well is rotted. So I guess I’m looking at tearing out the entire transom well, replacing the transom in one piece, and rebuilding two brand new braces.