Why Greenville attics grow mold under the sheathing, how full containment and dehumidification clears it, and what a moisture-source fix actually costs.
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A Greenville attic fails from trapped moisture, not sunlight. The Upstate humidity condenses on the underside of the sheathing in the coolest hours before dawn, and that is where black mold starts on north-side sheathing and soffit overhangs. Full containment means sealing the attic off from the living space, running dehumidifiers and air-scrubbers, and replacing any insulation that has absorbed growth.
On homes along North Main, Augusta Road, and the Reedy River valley, the moisture path runs back to a blocked ridge vent or a bathroom exhaust that terminates in the attic instead of outside. That is the fix that keeps the removal from coming back in six months.
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