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Crawl Space Encapsulation & Waterproofing
Damp, moldy or smelly crawl space? How crawl space encapsulation, drainage and dehumidifiers work and what they cost.
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Up to half of the air on the first floor of a home can come up from the crawl space. When that crawl space is damp, the result is musty smells, mold, sagging insulation, rotting wood, pests and higher energy bills.
What encapsulation includes
- Cleaning out debris and old, wet insulation
- A heavy-duty vapor barrier on the floor and up the walls, with sealed seams
- Sealing vents and rim joists
- Drainage and a sump pump if water collects
- A dehumidifier to keep humidity under control
Typical costs
| Project | Typical range* |
|---|---|
| Vapor barrier only | $1,500 – $4,000 |
| Full encapsulation | $5,000 – $15,000 |
| Crawl space dehumidifier | $1,500 – $3,000 |
*General US ranges for orientation only.
FAQ
Common questions
Should crawl space vents be open or closed?
In most humid climates, sealing the vents and conditioning the space works better than venting humid outside air in.
Does encapsulation help with mold?
It removes the moisture mold needs. Existing mold should be treated as part of the job.
Service areas
Where we can help
Pennsylvania
More service areas
- North Jersey & the Jersey Shore
- Long Island (Nassau County), NY
- Maryland (Baltimore & Washington suburbs)
- Washington, DC
- Northern Virginia
- Minneapolis – St. Paul, MN
- Tennessee (Nashville, Knoxville, Chattanooga & more)
- Metro Atlanta, GA
- Charlotte, NC & Rock Hill, SC
- Portland, OR & Vancouver, WA
- Alabama (Birmingham, Huntsville, Montgomery, Mobile)
- Indianapolis & Central Indiana
- Chicago & suburbs, IL
Ready for a dry basement?
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- Local, independent contractors
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