Building Inspectors Licenses/Certifications Required: For the Iowa positions, you must have an Asbestos Supervisor Initial Certification; Current Asbestos Supervisor Refresher; Iowa Asbestos Supervisor License (must get within 28 days); Current Valid Physician’s Assessment; Current Respirator Fit Test. Must be on feet for up to 10 hours per day; regular standing, sitting, kneeling, twisting, bending; must be able to push, pull, lift, and carry up to 80 pounds regularly and over 100 pounds occasionally; must be able to work in extreme hot/cold, wet/dry environment.