Any carpet that got wet and didn’t dry out within a day or two is a candidate. In Birmingham, that happens more often than people think. A burst pipe during a January cold snap, a roof leak after one of our July thunderstorms, or humidity creeping up through a slab in an older Homewood ranch. Slow problems are worse, honestly. A potted plant that’s been quietly overwatering for six months does more damage than a weekend flood because nobody notices until the smell arrives.
The tells are usually the same. A musty odour that comes back no matter what you spray on it. Dark patches on the carpet, or a cold damp feeling underfoot when you walk barefoot. Allergies that flare up in carpeted rooms and calm down on tile or hardwood. If you can lift a corner and see dark staining on the backing, the mold is well past the early stage and surface cleaning will not touch it.