Which of these is a common sign of hidden mold growth?

A common sign of hidden mold growth is discoloration of walls. This phenomenon often occurs when moisture accumulates behind walls or in places that are not visible to the naked eye, providing an ideal environment for mold to flourish. Such discoloration can manifest as spots or patches that might be green, black, or even brown, depending on the type of mold. This visual cue can prompt further investigation into hidden mold issues, especially when accompanied by ongoing moisture problems or water damage.

Increased airflow, while sometimes beneficial for drying out areas and preventing mold, does not indicate the presence of hidden mold growth. A strong and pleasant floral scent is typically not associated with mold, as mold commonly produces musty or earthy odors due to the release of volatile organic compounds. A smooth surface texture is generally unrelated to mold; rather, mold growth can lead to irregularities on surfaces or even cause peeling or bubbling paint. Thus, discoloration of walls stands out as a clear indicator of potential hidden mold problems that require attention.