The Trailer Made tiny house foundations come standard with pre-installed belly pan flashing. This flashing not only protects the underside of your house, but also provides a substrate on which you insulate the floor. Our recommendation is to use spray foam insulation, providing a water/mold/pest resistant insulation that will fill all voids in the floor cavity. However, the flashing provides a platform for any kind of insulation you choose. Six inches of floor spacing provides enough room for a whopping R30 floor insulation. You will also need a moisture barrier between the steel elements and your subfloor. We recommend a layer of sill-seal (shown in blue).
Step 2 - Subfloor
Your tiny house foundation’s structure is designed to provide your subfloor support structure as well. Following insulation, lay down your moisture barrier and secure the subfloor. It is that easy!
Step 3 - Framing
You’re ready to frame and stand your walls! The sill plate along the foundation’s perimeter is engineered to handle all of the structural loads from the walls. The sill plate also allows you to secure your structure with appropriate hardware, just like a traditional house. Using Simpson Strong Ties’ HTT4 or HTT5 tension tie and 5/8″ bolts, along with other fasteners at regular intervals along your bottom-plates, your house will be able to withstand all the forces it will be subjected to both while traveling down the road and sitting stationary.
That’s all, folks!
After your framing is complete and secured appropriately, continue construction as you would any traditional structure with the roof framing, sheathing, windows, roof & siding, and then rough mechanicals and interior. At this point, you’re well on your way to your home!