No responsible contractor should call any treatment permanent, but the logic is straightforward: mold needs moisture, and a properly closed crawl space removes the moisture mechanism that supports it. Where the soil is covered continuously, bulk water is drained, and the sealed air is managed by one of the four methods Section R408.3 of the…
There is no meaningful price per square foot in this county, because the variables that drive scope are physical and property-specific: whether the home sits in a FEMA AE or VE flood zone, whether the hydric soil is delivering standing water that requires drainage before anything is sealed, crawl space height and access, island logistics,…
You need one of four things, and in most Lowcountry homes dehumidification is the practical choice. Section R408.3 of the 2021 International Residential Code requires a closed crawl space to be conditioned by continuously operated mechanical exhaust at 1 CFM per 50 square feet of floor area, conditioned supply air from the home’s HVAC at…
Encapsulation is not a pest treatment, but it removes much of what attracts pests. Subterranean termites are strongly drawn to wood in the 16 to 20 percent moisture content range, and palmetto bugs and rodents seek moisture and harborage — a dry, sealed, debris-free crawl space is a far less appealing environment. What encapsulation must…
South Carolina code sets the floor, not the target: Section R408.3 of the 2021 International Residential Code requires a continuous Class I vapor retarder over the exposed earth, with 6-mil polyethylene as the minimum, and specifications commonly reference ASTM E1745 Class A performance. Over Beaufort County’s hydric soils — roughly 73 percent of the county…
Ductwork sweats when its surface temperature falls below the dew point of the air around it. In a vented Beaufort County crawl space during the humid season, that happens constantly: cold supply air keeps the metal well below the low-70s dew point of the air coming through the foundation vents, so water condenses on the…
In Beaufort County, humidity does more crawl space damage than rainfall. Air near saturation enters through foundation vents, meets subfloor framing and ductwork that are cooler than its dew point, and deposits water on them. Wood moisture content rises, fungal growth follows, fasteners and mechanical components corrode — accelerated near the marsh by salt air…
A musty smell in the living space almost always originates below it. Because of the stack effect, a large share of the air you breathe on the first floor is drawn up out of the crawl space, so odors from damp framing, wet insulation and microbial growth are delivered directly into your rooms. If the…
Opening foundation vents in a Lowcountry summer generally makes crawl space moisture worse, not better. When outdoor air at a low-70s dew point enters a crawl space where the subfloor and ductwork are considerably cooler, that moisture condenses on the wood and metal. But simply closing the vents is not the answer either: sealing openings…
A vapor barrier is a ground cover that slows soil moisture from evaporating up into your substructure. Encapsulation is a complete system: bulk water and drainage addressed, the space cleaned, a continuous sealed barrier run across the earth and up the foundation walls, and the sealed air actively managed by one of the four methods…