Using Expert Witnesses by Sam Abdulaziz Because Construction claims are so complicated and require peculiar skills, they almost always require the use of an expert witness. Most states and the federal government allow an expert witness to testify if that testimony is something outside common knowledge. That is, if the work that is performed and being evaluated is something that a reasonable person would not be able to evaluate, and if an expert in that particular field could aid in that evaluation, then that expert's testimony would be allowed. Workmanship in the construction area is not something that is normally within the realm of everyday knowledge. Certainly cracks and shades of color may be something that can be testified to by anyone. However, the