Choosing a mold remediation contractor

Choose a Mold Contractor

The right contractor follows standards, documents the work, and keeps your project under control.

Credentials and Training

Training aligned with IICRC S520 or similar standards
Clear separation between assessment and remediation when possible
Documented containment and PPE protocols
Review standards and certifications for context

When a Professional Is Recommended

Public health guidance recommends professional help for larger areas of mold or when contaminated water is involved.

Visible mold covering more than 10 square feet
Mold after sewage backups or contaminated water events
Hidden mold suspected inside walls or HVAC systems
Occupants with severe allergies, asthma, or immune concerns

Questions to Ask

How will you isolate the work area and prevent cross contamination?
What materials will be removed versus cleaned?
Who performs clearance testing and what is the pass criteria?
How will you document moisture correction?

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5 more contractor questions

Compare Bids

Look Beyond Price

Containment details and equipment list
Clear material removal and cleaning methods
Defined clearance testing process

Watch for Gaps

No mention of negative air or containment
Vague language like "treat" without removal steps
No plan for post-remediation verification

Red Flags

Pressure to sign immediately or large upfront payment
Claims that chemicals alone solve mold problems
Refusal to provide written scope and photos
No discussion of containment or clearance testing

Contract Essentials

Detailed scope of work with line items
Defined timeline and access plan
Clearance testing responsibilities
Waste disposal plan and cleanup