A few years ago I took a hard look at how we put up houses, and thought there has to be a safer, more efficient way to build. Consider conventional practice: After lifting up a framed and sheathed wall, and building the roof, someone sets up staging and moves it all around the house for running soffit and fascia. Then he moves it all the way around the house again for siding. Then a painter moves it all the way around to stain. Every day is spent trudging over the soft, uneven terrain of a freshly excavated site. Every day countless manhours are spent covering material, kicking aside scraps, chasing blowing trash across the neighbor's lawn, carrying tools and material up and down ladders, setting up new work stations, running to the lumberyard for another pound of