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–$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.