What is a common sign of mold growth within a home?

Visible discoloration on walls or ceilings is a common sign of mold growth within a home. Mold spores thrive in moist environments and can cause staining or discoloration as they grow. This discoloration may manifest as black, green, or even yellow patches, often indicating dampness or a prior water intrusion that has not been properly addressed. Home inspectors typically look for these visual signs as a key indicator of potential mold issues, as they can signify underlying moisture problems that could impact the structure, air quality, and health of the occupants.

The other options do not typically correlate with mold growth. Smooth and clean surfaces suggest a lack of contaminants or growth, fresh paint may mask existing issues but does not indicate mold, and strong chemical odors could be related to cleaning agents rather than mold itself.