Hiring a certified remediation contractor is not required but when it comes time to sell your home, you are required by law to disclose any mold incidences in your home including floods. If the work was done by a licensed certified Remediator, they should require a mold clearance test for the area. This gives your buyer proof that the work was done by a competent licensed remediator. when you meet with them, ask questions. If you have any questions that you need to be answered, feel free to call Safe Homes Environmental Consultants to help you out. For more details visit https://alphaomegapros.com/commercial-disaster-restoration-company/commercial-mold-remediation/