Ganderson - I have noticed the same thing, all studs are spaced at 1' 4" from the outer edges which of course is wrong. I posted such here a while back but never got anything back on it. Perhaps HouseBuilder was meant as a simple tool to estimate materials and get an idea of what the finished project looks like, because anyone using it as drawings to build by are in for a rude awakening when they go to install their sheet products. Unless I'm missing something? What I don't understand is why there are not hundreds of posts pertaining to this over the years that HomeBuilder has been out there.