Hybrid Vs. Full Encapsulation
Why more plastic doesn't necessarily mean better performance.
Full encapsulation systems wrap plastic up foundation walls and around piers, creating a clean, finished appearance. Hybrid encapsulation systems use a ground-pinned vapor barrier combined with full air sealing and dehumidification, without wrapping walls or piers. While full systems look impressive, they rarely provide additional moisture control in low crawl spaces.
In humid regions, moisture problems are caused by air movement and condensation, not by ground vapor. Wall liners do not stop humid air from entering or prevent condensation from forming on ductwork, wood, or plumbing. Because of this, hybrid systems perform just as effectively as full systems when air sealing and humidity control are done correctly.
Hybrid encapsulations are easier to maintain, easier to repair, and far more practical in low crawl spaces. They allow access for plumbing, HVAC, and termite inspections without cutting or damaging liners. They also cost significantly less while delivering the same moisture control performance.
Full encapsulations can make sense in tall crawl spaces where access, maintenance, and inspection are simple, or in hill and mountain regions where large surface areas of the high crawl space walls are against moist ground. In most low crawl spaces, however, full liners add cost and complexity without improving results. The effectiveness of an encapsulation is determined by air sealing and dehumidification, not by how much plastic is installed.
