An affordable first line of defense
A vapor barrier is plastic sheeting laid over the dirt floor of a crawl space to block ground moisture. Many Triad homes have an old, thin, or torn barrier that no longer does its job.
When a vapor barrier alone may be enough
- The crawl space is dry with no standing water
- Humidity is moderate and there's no significant mold
- Budget is limited and you want to improve conditions now
Options
- 6 mil polyethylene: basic, often found in older homes, tears easily
- 10 to 12 mil reinforced: better durability
- 15 to 20 mil reinforced: best for foot traffic and storage
Installation details that matter
Overlapping and taping seams, sealing around piers, extending a few inches up walls, and securing the edges all improve performance.
Related Crawl Space Topics
EncapsulationDehumidifiersDrainage & Sump PumpsStructural RepairMold & Insulation RemovalMusty SmellSagging FloorsStanding WaterCrawl Space MoldCost Guide
Frequently Asked Questions
How much does a vapor barrier cost?
Commonly about $1,500 to $4,000 for a typical Triad home, depending on size and thickness.
Can I install one myself?
Yes, if the crawl space is accessible and dry. Watch for safety hazards and pests.
Ready for a straight answer? Tell us about your project and we'll connect you with a licensed, insured local pro for a written quote.
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