What Is a Crawlspace Vapor Barrier?
A crawlspace vapor barrier is a protective liner installed across the ground to block moisture from evaporating into the crawlspace. In Huntsville, Madison, Decatur, Athens, Hazel Green, and surrounding North Alabama areas, high ground moisture and humid air make vapor barriers essential for preventing mold, wood rot, and musty odors. We install 12-mil woven vapor barriers, which are far more durable than thin plastic sheets sold in hardware stores. They resist tearing, stay in place, and provide long-lasting moisture protection.
Why Your Home Needs a Vapor Barrier
High Ground Moisture Levels
Dense clay soil across North Alabama traps water, causing moisture to rise into crawlspaces year-round.
Prevent Mold & Wood Rot
Moisture evaporating from the ground increases humidity, leading to mold growth and structural damage.
Better Indoor Air Quality
Up to half of the air inside your home comes from your crawlspace — a vapor barrier helps reduce odors and contaminants.
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What’s Included in Our Vapor Barrier Installation
Full Crawlspace Inspection
We check moisture levels, soil conditions, existing barriers, and crawlspace access.
Removal of Old or Torn Plastic
We remove loose, thin, ripped, or moldy liners that are no longer effective.
Ground Prep & Debris Removal
We clean all contaminated surfaces, remove buildup when mold is heavy, and scrub joists as needed so antimicrobial treatment penetrates properly.
12-Mil Woven Vapor Barrier Installation
We install a strong, puncture-resistant liner built to last and hold up against foot traffic.
Overlapping & Sealing Seams
We secure overlaps and seal seams to block moisture more effectively.
How Much Does a Vapor Barrier Cost in North Alabama?
A high-quality vapor barrier installation typically costs $1,000 – $4,000+ depending on crawlspace size, prep work, and whether old liners or insulation need removal.
Every project comes with a clear, no-pressure quote and photos from your inspection.
What Affects Vapor Barrier Installation Cost?
Crawlspace Size & Accessibility
Tight areas or large crawlspaces require more material and time.
Removal of Existing Plastic or Debris
Old plastic sheets or damaged liners must be removed.
Ground Condition & Prep Work
Uneven soil, debris, or moisture pockets require additional preparation.
Type of Vapor Barrier Installed
12-mil woven liners cost more but last significantly longer than standard plastic.
Want to know your exact cost?
Get a Free Crawlspace Inspection Today.
Trusted by Homeowners Across Huntsville
★★★★★ 5.0 Rating on Google
John Davis
2025-12-04
Great customer service and attention to detail
Seth Benefield
2025-12-04
Awesome company with great dependability! Will definitely use again.
Stephen driggers
2025-12-03
They done an amazing job getting the water out of my crawlspace before it damaged anything,very professional and polite. Would highly recommend to anyone needing anything done underneath the house for sure. 5 stars
Michael Warner
2025-12-03
Vanguard is professional and operates with integrity taking care of their clients.
Jason Polk
2025-12-03
Fast results, fair pricing and easy to talk to my crawl space is sealed and clean!!
Tony Grigsby
2025-12-03
Vanguard treated my crawlspace as if it were their own. Josh was incredibly informative and not pushy at all. These are the qualities I look for in a contracting company. If you need any crawlspace work done, give them a call. A plus in my book!