What is crawl space encapsulation?
Crawl space encapsulation seals a damp, dirty area to create a clean, dry space that discourages mold. The most common method is installing a vapor barrier on floors and walls. Other options include sub-membrane depressurization and full encapsulation that includes the ceiling.
How long does encapsulation take?
Most installations take about one day; some homes require two to three days. Timing depends on crawl space size, debris, and the encapsulation method needed.
I don’t use my crawl space—why keep it dry?
Moisture and standing water promote mold and bacteria that can enter the home’s air. Since 40–50% of household air can come from the crawl space, this is a health risk. Excess moisture also leads to wood rot and structural damage, reducing home value.
My gravel crawl space seems dry—why worry?
Gravel still allows significant moisture and soil vapors to enter. While gravel can hide issues, moisture and gases remain a risk. Sealing and encapsulating the crawl space helps prevent mold, rot, and harmful vapors regardless of floor material.
Why is encapsulation needed for radon mitigation?
Radon follows the path of least resistance—often an open dirt or gravel crawl space. Effective mitigation requires sealing major entry points to create negative pressure under the barrier and draw gas out. Leaving a crawl space open causes the system to pull air from the basement instead of under the slab.