What is a common sign of a roof leak during an inspection?

Visible mold growth indoors is a common sign of a roof leak during an inspection. When a roof has a leak, water can enter the interior spaces of a building, creating conditions that are conducive to mold growth. Mold thrives in moist environments, and if there is ongoing moisture from a roof leak, it can lead to noticeable mold formations on walls, ceilings, or other surfaces inside the home. This is often one of the first indicators that home inspectors look for, as it can signal not just a roof issue but potential health risks associated with mold.

In comparison, while dark streaks on the roof surface can indicate algae or other issues, they do not definitively confirm the presence of a leak. Loose shingles found in the yard might suggest wind damage or age-related wear, but it does not directly point to a current leak, as the water entry point may not be viable even if shingles are missing. Unusual shapes in the roof design could raise concerns about the roof's structural integrity but are not a clear indication of a leak. Thus, the presence of visible mold indoors is the most direct and reliable sign of a roof leak during an inspection.