If there is a problem and they need us to spend time looking into it, there is a charge for that time. If it is a problem with my workmanship than we will waiv

If there is a problem and they need us to spend time looking into it, there is a charge for that time. If it is a problem with my workmanship than we will waive the charge. If they insisted on a language/framework/product/etc and that is the root cause of the problem, they will pay for the fix.