To properly align the mud sill on new construction, whether be an addition or a new home, where is the mud sill lines pulled from? I was a new home carpenter and they never showed me where the lines were pulled from for the sill on the walls. I was just wanting to know where to pull from for square wall all the way down the building?
typically check foundation for square/ parallell. if all is close choose longest wall, measure wall thickness ay both ends and mark and snap. then choose longest perpindicular wall, and use pythagorum theorum to mark a square line on it. the everything bocomes measuring for parallell walls.