New Hampshire doesn't license mold work. See how we verify New Hampshire pros
Serving Derry, NH, Cornerstone IAQ Services LLC is a verified mold professional specializing in removal and remediation. Highly rated at 4.9/5.0 based on 50 customer reviews.
Based on 50 reviews
Aggregated from public review platforms
Review Strength
Scored out of 100: up to 55 points for review volume, 35 for rating quality, and ±10 for standing against the local average.
What mold remediation professionals do
Professional removal and treatment of mold growth in residential and commercial properties. Includes containment, HEPA filtration, antimicrobial treatment, and post-remediation verification.
Emergency water extraction, structural drying, dehumidification, and restoration following floods, leaks, or plumbing failures.
New Hampshire doesn't license mold remediation, though state law requires a national third-party certification (such as ACAC) for residential mold assessment services. We verify New Hampshire pros directly: business identity, location, and reputation, plus certifications when provided.
Regulatory facts last reviewed June 2026.
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