www.epa.gov/iaq/moisture
Figure 1-2 Mold growth on painted concrete masonry. The cool masonry wall
separates a classroom from an ice rink. Humid air in the classroom provides
moisture that condenses on the painted surface of the masonry. That moisture
allows mold to grow on the paint film.
Figure 1-3 Mold growth on vinyl floor tile. Long-term high humidity provided
moisture that was absorbed into the cool vinyl tile and supported mold
growth. Also note that the high humidity caused the adhesive attaching the
tile to the floor to fail, allowing the tile to become loose.
Figure 1-4 Corrosion of galvanized fluted steel floor deck. The floor is at grade
level. The source of the water is rainwater seepage.
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