People call PureSpec asking for a "mold test." About half the time, what they actually need is a mold inspection. Here's the difference, and why mixing them up costs people money on the wrong service.
Mold inspection
An inspection is the investigation. The inspector walks the property, uses moisture meters and thermal imaging, evaluates the HVAC, examines visible growth, and writes up findings with photos. The output is an understanding of what's happening and where.
Mold testing
Testing is measurement. Air samples count spores per cubic meter. Surface samples identify what species are growing on a specific patch of drywall. ERMI/HERTSMI-2 measure cumulative DNA from settled dust. Mycotoxin testing measures specific compounds. Each test answers a narrow, specific question.
Why testing without inspection is often wasted money
- An air sample showing "elevated levels" tells you nothing about where the source is. You still need to find it.
- A surface sample identifying Stachybotrys on a piece of drywall tells you that drywall has Stachybotrys. It doesn't tell you whether your HVAC is spreading it, whether moisture is still active, or what the building's overall condition is.
- An ERMI score on a house you've never been inside is just a number. The number means very different things in a building that's clean-and-dry versus one with active moisture.
When testing alone makes sense
- Post-remediation verification. A remediation contractor has finished work; an independent test verifies the work actually achieved its goal.
- Targeted clinical question. A healthcare provider has asked for a specific panel (mycotoxin, ERMI, HERTSMI-2, endotoxin) for a CIRS/MCAS evaluation. The clinician already has the inspection context.
- FHA/VA water testing. A specific lender requirement, the test answers exactly what's being asked.
When you need both
Most homeowner concerns, a smell, visible growth, post-leak worry, a recurring HVAC issue, need the inspection first. The inspector decides what testing to do (or whether testing is even necessary), based on what's actually present.
Inspection-only is also valid
Sometimes the inspection finds the problem without sampling. Visible Stachybotrys on drywall behind a leaking pipe doesn't need an air sample to confirm what your eyes already saw. The inspector can write a remediation protocol directly. Testing in that case wastes money.
The honest version
If a company sells you a $200 "mold test" without an inspection, ask what question the test is supposed to answer. If the answer is generic ("we'll see if you have mold"), it's a marketing service, not a diagnostic one. The right framing is always: what question are we trying to answer, and what's the cheapest, most defensible way to answer it?
