I've been studying the design and construction of "Tiny Homes" for several years now and am approaching this little project as a practical starter into that realm. One of the first things recommended when building a tiny house is to remove all but the necessary planking to support the sub-floor and cover it with metal flashing to effectively seal it against intrusion from weather, road debris or pests. In the stealth trailer this is somewhat different but the same protective measures need to be taken. In my particular trailer, and I suspect this is common to them, the floor is comprised of "S"-channel steel that runs laterally across the trailer which supports 3/4" plywood cut to shape and screwed into place. The odd part is that the walls are constructed around the base, rather than on top of it, as would typically be the case in "Tiny House" construction. This presents a slight problem to the cause of effectively sealing the underside of the floor from intrusion. Even if I were to essentially replace the current plywood with flashing and then build the sub-floor atop it, there would still be a clear path into the trailer from beneath it via the wall cavities that extend below the floor (I'm guessing that a photo is worth a thousand words here). Essentially, if the trailer were flooded with water, it'd run across the floor to the edges of the walls, run down and pour out between the two. That seems to be a likely design intent, however it makes preventing things getting in that way difficult. Possible solutions are:
- Make a "c-channel" out of some sort of mesh to fit over the end of the foam insulation and somehow affix it to the bottom most edge of the wall, extending on the "in" side up and into the floor of the trailer. This would, in theory, be the same method used when siding walls with wood and protecting the air-gap between the exterior wall and the siding from insects.
- Lots of flashing and silicone?
- Learn to weld?
Sovereignty eventually...