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Testing Without a Real Inspection
EPA and NIOSH emphasize that visual inspection and moisture diagnosis are the most important parts of mold assessment. A company that only sells air tests without checking for moisture sources is skipping the step that actually solves the problem. Good inspectors look for hidden mold and trace moisture to its source in problem areas throughout your home.
One-Sample Promises
Be cautious when anyone sells one air sample as a complete answer. A defensible plan starts with a specific building question, selects enough locations and method-appropriate controls to answer it, documents sampling conditions, and explains limitations before collection.
Pass/Fail Claims
There are no federal health-based limits for indoor mold, and short-term results vary with the method and building conditions. No single count or indoor/outdoor ratio can certify that a building is safe. Require the report to connect each result to the pre-defined question, method controls, documented conditions, and visual and moisture findings. Learn how to read your test results so you can evaluate whether the conclusions match the evidence.
Conflict of Interest
When the same company evaluates a problem and sells the proposed remedy, there is a potential financial conflict. Ask for written disclosure, check any state licensing or separation rules, and consider independent review for a consequential scope of work. Our Contractor Vetting Guide can help you compare qualifications and proposals.
Fogging or Spray-Only Fixes
EPA does not recommend routine use of biocides or antimicrobials. Spraying or fogging without removing mold and unsalvageable materials and fixing the moisture source is not complete remediation. The plan should decide which materials can be cleaned and which must be removed, with contaminant controls such as containment and controlled pressure when needed to reduce spread.
Red Flags Checklist
Watch for these warning signs when evaluating a mold testing or remediation company:
- Offers free testing (often leads to inflated remediation quotes)
- Uses scare tactics about toxic mold or health dangers
- Refuses to provide credentials or references
Questions to Ask Any Testing Company
Ask these questions before hiring a mold testing company:
- What moisture tools do you use during inspection?
- How do you determine the source of dampness?
- Which controls or comparison samples does the method require, and why?