They called us about a flooded closet. A licensed Florida mold assessor walks through a real St. Johns County inspection step by step — the visual walkthrough, moisture mapping, taking the air handler apart, the lab results, and what the report actually concluded.

A bathroom fan that's too small — or vented straight into the attic — quietly feeds mold in humid Northeast Florida homes. Here's how to tell yours isn't keeping up, how to size one correctly, and the venting mistake we find most often on inspections.

Air testing is usually the first thing people ask for when they suspect mold, but on its own it rarely answers the question. Here's what testing can tell you, what a licensed assessment adds, and when each one is worth doing.