The entire structure was built using the balloon framing method which is the standard for home building in hurricane prone areas. This was done because pulling it down the road creates wind loads similar to a hurricane. The sheathing was nailed along all four sides (as opposed to the traditional method of two sided nailing) and all seams were glued and then caulked. The result is a very strong, tight structure.
A tiny house on wheels in New York. More info. here.