After about 6 months of work, we finished the downstairs interior of our floating home. The home used to be an old boat house, basically a garage for a boat. You open up the garage door and drive your boat right in. To convert this floating garage into a home we began by removing the garage door and in it's place, installed a normal wall with windows and a sliding door. But, we had a big hole filled with water in the middle of our home. This was the boat well - where the boat would stay tied-up and out of the weather. To make it a functional floor we had to add logs, then place stringers (which are heavy-duty wooden beams) on top of the logs, then floor joists, insulation (to keep us warm from the water beneath) then plywood and finally, flooring.