Ensure sure the contractor is up to date and competent on existing procedures. The contractor should be IICRC accredited in Applied Microbial Remediation, qualified if appropriate, and have general liability as well as policies for contamination. (Regular liability policy Will NOT protect the mold) so for at least 3-5 years the contractor will promise their job. The Better Business Bureau is indeed an outstanding tool. There is no amount of disinformation and corrupt vendors, but do your research.Check out A-1 Certified Environmental Services for more info.
3rd party air quality expert identified as industrial hygienist will also be employed in the mold remediation industry to direct the operation of any but the smallest schemes to be checked through experimental methods that the mold rates have been lowered close to historical standards. Far too frequently the contractor leaves without checking only to find out that the mold has not been cleaned correctly, putting the home owner in risk. On a surface as small as a tack, up to a million mold spores may be present and not be visible to the naked eye (testing is critical!). Then let’s think about the operation. Design of a remediation strategy would be the first step. The hygienist can often be of help with this. The workspace will be segregated for any remediation project by putting up polybarriers, closing off vital barriers such as duct work, openings, walls, flooring holes where liquids join, etc. Next, negative pressure (a vacuum effect in the area) to isolate the workspace from the other areas should be established and maintained during remediation work. This prevents the sending of mold spores into untouched areas. You should also set up air scrubbers which are large HEPA filters to clean or scrub mold spores from the air.
Contaminated raw products such as wallpaper, drywall & furniture will be packed bagged and disposed of as usual waste according to local laws. All salvageable framing should be brushed aggressively with wire or blasted with media followed by a HEPA vacuuming and wiping with a mild detergent (soap and water works well). Hard chemicals are not required for mold washing, treatment or removal. Perhaps I ‘d go so far as to suggest that if a contractor decides they ‘re trying to use bio-cides or antimicrobials to kill mold in the house I ‘d search elsewhere. For certain nations, these are called pests which pose a serious danger to both the inhabitants which consumers. For states including Maine, the remediation companies must be approved to add some disinfectant or antimicrobial agent to master pesticide applicators. Unfortunately there are those that will not agree with this rule. Perhaps these additives pose more of a challenge than the mold itself. A good surfactant detergent works best (dawn platter soap, pine sol, etc.). Understanding that killing mold isn’t the goal is critical, removing mold is the goal through aggressive cleaning and good engineering controls.