DIY Mold Test Kit vs Professional Testing
A hardware store mold test kit will almost always grow something, because mold spores are present in all indoor air. What kits cannot do is tell you the concentration relative to outdoors, where the growth is, or what is keeping it wet — which are the three things that determine what you should do.
| DIY test kit ($15–$40) | Professional testing ($349–$599) | |
|---|---|---|
| Confirms spores exist | Yes, always | Yes |
| Compares to an outdoor control | No | Yes — the essential comparison |
| Identifies concentration | No | Yes, spores per cubic metre |
| Locates the growth | No | Yes, with moisture mapping |
| Identifies the water source | No | Yes — the actual fix |
| Accredited lab analysis | Rarely, often extra | Yes |
| Usable in a dispute or sale | No | Yes |
| Tells you what to do next | No | Yes |
Kits are not useless — they are simply answering a question you already know the answer to. If you can smell mold, you have mold. The question is where and why.
Related
Common questions
Which option do most people choose?
Most people who call us already know something is wrong and want it established properly rather than guessed at. The exception is a small visible patch with an obvious cause, where we usually tell them to clean it themselves.
Will you tell me if I do not need testing?
Yes, and we do it regularly. Phone consultations are free. A company that never talks anyone out of a purchase is a company selling rather than assessing.
Can I change my mind after booking?
Yes. There is no charge to reschedule or cancel with reasonable notice.
Get a straight answer about your building
We test, document and verify. We never sell remediation, so we have no reason to find a problem you do not have.