Our tiny house has gone up very fast thanks to Ian Fotheringham. Once the subfloor was spray foamed and sealed up with grey water tank in place, the framing began. The studs were all pre-cut with a 4 degree angle at the top to match the slope of the roofline. Wall assemblies were framed on the surface of the bed of the trailer to assure trueness and accuracy. We even applied the house wrap before the wall assembly was raised in place and secured to the subfloor.