Crawl Space Encapsulation in West Georgia

Encapsulation turns a damp, vented crawl space into a sealed, dry space. In Georgia's humidity, it's one of the most effective ways to stop musty smells, mold and wood damage under your home.

What encapsulation actually is

In a traditional vented crawl space, outside air flows in through foundation vents. In Georgia, that air is humid most of the year, so moisture condenses on joists, ductwork and insulation. The ground itself also gives off moisture. Encapsulation fixes both by sealing the space off and controlling the humidity.

What's usually included

• Heavy vapor barrier: a thick, reinforced liner across the floor and up the walls, with seams taped and sealed. Thicker liners (often 10 to 20 mil) hold up better to foot traffic than thin plastic.
• Sealing vents and openings: foundation vents, rim joist gaps and other air leaks get closed off.
• Dehumidifier: a crawl space dehumidifier keeps humidity in a safe range, usually below about 60%.
• Drainage and sump pump (if needed): if water collects after storms, a drain and sump pump handle it before the liner goes in.
• Insulation changes: some contractors insulate the foundation walls instead of between the floor joists.
• Repairs first: mold treatment, rotted wood or sagging joists are usually fixed before sealing everything up.

Signs you need it

• Musty smell in the house, especially in summer
• Mold or white fuzzy growth on joists
• Sagging or wet insulation hanging down
• Standing water or puddles after rain
• Cupping hardwood floors or high indoor humidity
• More bugs, spiders or rodents than usual

Encapsulation vs. just a vapor barrier

A basic vapor barrier (thin plastic on the dirt) is cheaper and helps with ground moisture, but it leaves the vents open, so humid air keeps coming in. Full encapsulation seals the space and controls humidity. If you only have mild moisture, a contractor may suggest starting with a barrier and better drainage.

Questions to ask a contractor

• How thick is the liner, and how are seams and walls sealed?
• Is a dehumidifier included, and what size? Who services it?
• Will you fix drainage or water entry first?
• What warranty comes with the liner and the dehumidifier?
• Are you licensed and insured, and can I get a written, itemized estimate?

Curious about price? See the crawl space encapsulation cost guide. New to this? Read what crawl space encapsulation is (and whether you need it).