Public inspectors check only for the minimum standards required by the building code.
Private home inspectors, on the other hand, will check the quality of workmanship, and will often catch things the public inspectors missed because they typically spend more time. These groups provide continuing education to their members. ASHI has strict membership requirements. Members must pass a rigorous exam and prove they've done at least 250 home inspections that meet the association's standards. Ask how much experience they have.