Homeowners should check for several interior clues that suggest hidden water intrusion due to roof damage. Common indicators include yellow or brown water stains on ceilings or walls. Inside the attic, signs to look for include daylight visible through roof boards, which indicates gaps or missing shingles. If the attic feels damp or has a musty odor, even without visible water, it may also signal a leak. Additionally, homeowners should inspect around chimneys, vents, and skylights for signs of moisture, as well as check for peeling paint or rust on nails, which can indicate condensation issues.