When vapor-barrier-only is the right call
- Crawl space is structurally sound, no sagging floors, no joist damage
- No standing water, no rising-groundwater issues
- Homeowner budget is constrained and the priority is "stop the smell"
- Home is younger (post-1995), less likely to need full encapsulation's other benefits
When to skip vapor-barrier-only and go to full encapsulation instead
- Standing water or visible moisture, needs drainage first
- Mold present, needs remediation + sealed liner, not just a vapor barrier
- Pre-1980 home, full encapsulation almost always the better long-term value
- Home for sale within 18 months, buyers' inspectors prefer encapsulation
What's included
- 6-mil or 20-mil poly liner, your choice (most homeowners pick 20-mil at $300 to $600 upcharge)
- Seams overlapped 12" and taped with butyl-mastic
- Liner run 6" up walls and around piers (not fully sealed, that's encapsulation)
- Existing debris removed, dirt floor leveled where needed
Common questions
Can I upgrade to full encapsulation later?
Yes. The liner stays in place; encapsulation adds the wall sealing, perimeter foam, drainage, and dehumidifier. Cost of upgrading later is roughly the same as doing encapsulation from scratch, there's no real "vapor first, encapsulation later" discount in our market.