I have been asked to help some friends with a framing walkthrough. The home is quite large, built on slab outside of Las Vegas. I am a fairly good amateur craftsman but have little experience with new construction. I am looking for some tips on what to look for in common framing mistakes or shortcuts. Any help in narrowing down what to inspect, or what the 'common' person would not think of doing. Should an outside professional be brought in at this point to help in the inspection. Thanks for any help on this matter.