My camera was misplaced when I did the floor, but it was comprised of a dozen or more separate pieces to make one solid sheet. It fit the floor like it was molded to it when finished and could be lifted out in one big piece, and sealed the entire surface of the interior.

I also like to tape all the edges to keep the edges clean looking. The black tape you see here is Gaffer's Tape. The stuff they use in the film movie industry. It's water resitant, durable and sticks well. I also use that foil tape they sell at Home Depot etc.