Air Quality
What you're seeing
That damp, earthy odor upstairs almost always starts below. Because air moves upward through a house, most of the air you breathe on the first floor passed through your crawl space first — carrying mold spores and moisture with it.
Common causes
- Sustained high humidity in the crawl space
- Standing water or wet insulation
- Open vents pulling in humid Georgia air
- Mold growing on joists, subfloor, or ductwork
