Reviewed by Elena Ramirez, Mold Remediation & Drying Specialist, IICRC AMRT #327506, October 2026.
Short answer: There are four main ways to look for mold: a visual inspection, moisture mapping with meters, thermal imaging, and air sampling with lab analysis. Visual inspection and moisture mapping find what you can see and where water is; thermal imaging finds hidden moisture behind walls; air sampling documents what is in the air. Mold-sniffing dogs are offered by some companies, but they don’t produce measurable readings or lab results.
The methods compared
| Method | What it tells you | Limits |
|---|---|---|
| Visual inspection | Visible growth, staining, water sources | Can’t see inside walls or identify species |
| Moisture meters | Which materials are wet, and how wet | Point readings; needs a trained eye to map |
| Thermal imaging | Temperature patterns that point to hidden moisture | Shows moisture, not mold itself |
| Air sampling + lab | Spore types and levels in the air, documented by a lab | Snapshot in time; costs more |
| Mold-sniffing dog | A dog’s alert to a location | No measured readings or lab report |
How 4Sure inspects
- $99: basic visual inspection of one affected area.
- $199: adds moisture meter readings and FLIR E8-XT thermal imaging.
- $349: adds air sampling with lab analysis.
Inspections are led by IICRC AMRT-certified technicians. The remediation estimate after the assessment is free. See mold inspection and testing.
Which one you need
- One visible spot you want fixed: visual inspection.
- A musty smell, a stain after a leak, or mold that may be inside a wall: moisture and thermal.
- A home sale, a rental dispute, health concerns, or a smell nobody can find: air sampling with lab analysis.
Common questions
What should I ask a mold inspector?
Ask which methods they will use, what readings or lab results you will get in writing, who holds the IICRC AMRT credential, and what the inspection costs before they arrive.
Is air sampling always necessary?
No. If mold is visible and the source is clear, a visual inspection with moisture mapping is usually enough to scope remediation. Air sampling helps when mold is hidden, for health concerns, or for documentation.
Can a thermal camera see mold?
No. It shows temperature differences that point to moisture. Moisture is what mold needs, so it helps find where mold is likely hiding.
Which 4Sure inspection includes what?
$99: basic visual of one area. $199: adds moisture meter and thermal camera. $349: adds air sampling with lab analysis. The remediation estimate after the assessment is free.
Call (385) 247-9387. 24/7 live-answered, 45-minute arrival inside Spanish Fork. Insurance billed directly.