No studs, just drywall on strapping. Think of it as a cinderblock building, only built with wood instead of concrete blocks. You run as much of the services as you can get away with on interior walls, where you can’t avoid it you stick them between the drywall and the exterior block. Brick or cinderblock makes for crappy insulation, wood is much better per inch than brick and the wooden blocks have big hollow spaces for filling with cellulose, so you get the super high r-rating you want for a passive house.
Judging by the amount of time construction projects take here in Toronto, the house in the video is very competitive time wise – 15 days from bare foundation to a complete, insulated, and sided exterior shell with finished roof (needing only varnish/paint and door/window installation) is pretty good.
ETA: Definitely an exterior varnish, not paint. show me someone who wants to paint the outside of one of these houses and I’ll show you someone without a soul.
