The Science of Crawl Space Encapsulation
Up to half of the air on your first floor comes from the crawl space beneath it. That single fact turns encapsulation from a home improvement into a health and energy decision — because whatever lives under your floors — humidity, mold spores, rodent debris — is being continuously circulated through your living space.
The science is straightforward: warm, damp air rises from the soil through the floor system in a process driven by vapor pressure, and traditional ventilated crawl spaces actually pull that moisture in rather than letting it out. Encapsulation stops the exchange at the source — a vapor barrier across the soil, sealed seams, sealed vents, and conditioned air held at a stable humidity level.
The measurable results are the reason the industry has standardized on encapsulation: lower indoor humidity, reduced energy bills, healthier air, and a dry environment that keeps floor joists and subfloor framing from rotting.
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