As a professional and certified mold inspector and remediation contractor I can say very confident with a few caveats. First and foremost, the conditions that resulted in mold proliferation need be addressed, completely. Some fixes are easy. Some are totally in the hands of the occupants. For example, we finished a remediation project for a landlord / tenant situation. The property had a high water table and the basement was waterproofed including active sump pump. However, the tenant, refused ( and told us so ) to pay for active dehumidification. She said that an added $50 to $100 a month in electric bills she did not want to pay for. Mold begins to grow at a relative humidity of just under 60%. Most of the basements we inspect ( that donot have active dehumidifiers running ) have readings of 70% or more. This means that most basements can use active dehumidification. Each project, upon successful completion receives a written list of specific recommendations. If they are not followed, the best mold remediation protocol in the world will eventually fail. So, in essence, the remediation is one thing and a certain amount of confidence can be placed in the work if done by a competent, certified, insured and licensed remediation firm. All projects go through a post-remediation check, with accompanying tests. However, whether the remediation is successful over time, with respect to the recommendations, the responsibility falls on the owner, tenant, occupant. Most mold remediation firms protect the interested parties with a transferrable written certificate of treatment good only for a specified time. Some offer a term guarantee. And still others have at their disposal, ability to arrange a real private bonefide insurance policy for a premium. If really concerned over lasting effects of mold remediation ask about the remediation firms ability to provide details regarding insurance where available.
If they are like us certified by the prestigious MICRO organization,they have the insurance options at their use.
By the way, having received formal education in biology, bio laboratory technology, mold testing, mold remediation and a host of other formal trainings ... successful remediation calls for both education and experience. For example, our "mentor" the guy who originally trained us, boasts of over 1200 major mold remediation contracts and not one failure.
Hope this helps better understand the complexities and responsibilities.
John Griffin Mold Remedy LLC CMI CMRC NAERMC Mold testing and remediation in New Jersey ( Mold-Remedy.Com ) (973) 255-7922