You will need to stop the water at its source and carefully remove and clean the mold infested materials. While this may superficially seem an easy task, let me assure you that it isn't.
So let me tell you from personal experience, you need to fine a qualified expert and professional that is certified by one of the agencies below. I would also suggest getting several bids for the work.
You can find a contractor or professional listings on the following sites. Both the IICRC and NORMI are certifying organizations for mold remediation, but the IICRC certification is perhaps the most widely used:
= Be sure to see our next post in our ‘Mold Education Series’ of articles for more info on A Great Natural Treatment for Mold Allergy >>>>>>>>