Your friend’s site is using Roots 3.6.0, whereas the current version is Roots 7.0.0.
Almost every aspect of Roots has changed throughout those iterations (including the grid system, the CSS framework and the sidebar code) so there’s not much we can help with.
If you check your console there are two stylesheets that aren’t loading. I would start by fixing the references to them and see if that helps.
Wow, 7.0.0! That’s awesome – I’ll definitely talk to my friend about updating to the current version. I saw there was a CSS Grid Framework menu in options; switching from blueprint to foundation set everything right again. Thanks!