There are several elements to the deck of a powerboat. First there is the deck structure itself. And of course there are hatches which cover the openings in the deck to engine rooms, lazarette storage areas and the anchor locker. Then, in the case of the Hard Top Express models, there are three more large FRP parts. The first is the "house" or the sides of the hard top enclosure then that it is topped off with the hard top itself. And to make the inside of the hard top look pretty we also mold a liner with a smooth gelcoat surface to cover the rough underside of the hard top.
In this image the hard top and liner are being attached to the top of the house. Once all of this work is completed the deck is ready to go out to the assembly area where the decking will take place