The Operating Systems, Lower Level, Interior and Exterior Inspection sections are EXTREMELY condensed versions of those found in our home inspection book: Home Inspection Business From A to Z
Real Estate Appraisers are not required to be home inspectors. However, I will include these sections anyway to give you some basic details about home inspections.
Some houses will have crawl spaces which are small areas underneath the house that aren't high enough to stand up in. You should ask the owner if there are any crawl spaces before starting your inspection. Ask this because the entrances to crawl space areas can be hidden by personal items or wall finishings.
You should use a jumpsuit, kneepads, a hardhat, gloves, and a flashlight to enter any crawl space areas that aren't too narrow for you to safely enter. A crawl space is an area that demands attention. Crawl spaces need attention because there's a higher risk of rot and termite infestation due to these areas being dark and damp most of the time. So don't get lazy and just assume everything is OK in the crawl space. You may end up regretting it if the client might call you up six months later to complain about the termite damage they found in the crawl space. You'll have a hard time defending yourself if you didn't check this area if it was accessible at the time of your inspection.
Check for the condition of the foundation walls, support posts, main girder, floor joists and sub flooring in the crawl space. Look for the same problems that were discussed in the lower level section.