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Crawl Space Vapor Barrier & Encapsulation System

Musty odors and high humidity are often signs of ground moisture entering your home, and we correct these issues by sealing your crawl space with our CleanSpace® encapsulation system.

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Everything You Need for a Dry Crawl Space in South Carolina, North Carolina, Alabama and Georgia

At Cantey Foundation Specialists, it’s our job to make sure that your musty crawlspace is transformed into a cleaner, drier, healthier, and more energy-efficient space by installing our  vapor Barrier and encapsulation systems to lock out dangerous moisture.

what is Vapor Barrier and Crawl Space Encapsulation?

Encapsulation vs. Vapor Barrier: It’s important to differentiate between a simple vapor barrier and full encapsulation.
  • Vapor Barrier: A thick plastic sheet laid across the dirt floor of the crawl space, primarily preventing moisture vapor from rising from the ground. It stops at the walls and columns.
  • Encapsulation: A more comprehensive solution where the entire crawl space (ground and walls) is covered with a thick liner, all vents are sealed, and often a dehumidifier and sump pump are installed. This creates a conditioned space within the home’s building envelope. Cantey Foundation Specialists emphasizes encapsulation as a superior solution.
Vapor Barrier and Crawl Space Encapsulation
Cantey Foundation Specialists

When to Encapsulate a Crawl Space

Musty Odors or High Humidity

You might notice a persistent, damp smell in your living area that simply won’t go away. This odor often signals that moisture is continually rising from the ground and getting trapped in your home’s air. Since a large portion of the air you breathe comes directly from below your house, these smells mean you are inhaling dirty crawl space air. High humidity levels can also warp wood furniture and encourage mold growth throughout the upper levels of the house. Encapsulation stops this moisture migration at the source to keep your indoor air fresh and dry.

If your floors feel uncomfortably cold in the winter or start to dip and squeak when you walk on them, your crawl space is likely the culprit. Cold floors usually mean unconditioned outside air is leaking in through open vents and cooling your home from below. Sagging often indicates that long-term moisture exposure has rotted the wooden floor joists and beams supporting your house. This structural damage will only get worse if the wood remains damp and soft. Sealing the space protects your home’s framework and helps maintain comfortable floor temperatures.

Seeing fuzzy growth or decaying wood under your home is a clear warning sign of a severe moisture problem. Mold requires damp conditions to thrive, so its presence confirms that your crawl space humidity is too high. This biological growth can eat away at your home’s wooden structure and negatively impact the air quality for your family. Ignoring these signs allows the rot to spread to other structural components and expensive subflooring. A dry, encapsulated space eliminates the damp environment that mold and rot need to survive.

Puddles or constantly damp soil under your house are serious red flags that need immediate attention. This water constantly evaporates upwards, drastically increasing the humidity in your entire home and feeding mold spores. It can also weaken the soil supporting your foundation piers, leading to settlement issues. Even if you don’t see a deep pool of water, damp earth alone is enough to cause significant issues for your home’s health. We address this with drainage systems and a heavy-duty vapor barrier to keep the area permanently dry.

Insects and rodents love cool, damp, and dark environments like an unsealed crawl space. If you notice an increase in bugs or signs of mice, they are likely entering through open vents or gaps in your foundation. These pests can damage your insulation, chew on electrical wiring, and spread disease into your living space. A sealed crawl space with a durable liner creates a tough barrier that pests cannot easily penetrate. It effectively makes the space inhospitable to these unwanted guests.

If your heating and cooling costs are higher than they should be, your crawl space might be to blame. Open vents let in hot, humid air in the summer and freezing air in the winter, forcing your HVAC system to work overtime to compensate. Ductwork running through a damp area also loses efficiency quickly and can rust over time. Encapsulating the space creates a conditioned buffer zone that prevents these temperature swings. This helps stabilize your home’s temperature and lowers your monthly utility expenses.

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The CleanSpace® Encapsulation System

Our Installation Process

Free Evaluation/Inspection

A service expert will visit your home to assess the crawl space, identify existing problems (moisture, mold, sagging, etc.), and determine the best solutions for your specific needs.
01

Clean Out Crawl Space

Any debris, old insulation, and potentially standing water are removed.
02

Address Water Intrusion (if necessary)

If there’s active water intrusion, drainage systems (like SmartPipe™) and a sump pump (SmartSump™) would be installed to manage and remove water.
03

Seal Vents

Crawl space vents are typically sealed with rigid foam or concrete blocks to prevent outside air and moisture from entering.
04

Install Vapor Barrier (CleanSpace®)

The heavy-duty vapor barrier is laid across the entire crawl space floor and extended up the walls. It’s secured with spray foam adhesive and/or butyl tape and foundation pins to create a continuous, airtight seal. Overlaps are typically 6 inches or more and are seamed together with tape.
05

Install Insulation (Optional but Recommended)

TerraBlock™ for the floor and/or SilverGlo™ for the walls and rim joists may be installed to further insulate and enhance the thermal performance of the crawl space.
06

Install Dehumidifier

An energy-efficient dehumidifier is typically installed to actively control humidity levels within the encapsulated space.
07

Final Inspection

The team ensures the system is properly installed and functioning effectively.
08

Seal Your Crawl Space. Protect Your Home.

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Patented, Exclusive Products

As an authorized Basement Systems contractor, they offer proprietary and proven products specifically designed for crawl space environments, which are often not available through generic contractors.

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Comprehensive Encapsulation

They don't just offer a basic vapor barrier but a full system that includes drainage, insulation, and dehumidification for a truly dry and healthy crawl space.

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Long-Term Warranties

The 25-year transferable warranty on their CleanSpace® vapor barrier provides significant peace of mind.

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Expert Diagnosis and Solutions

They emphasize a thorough evaluation to identify root causes and provide customized solutions rather than one-size-fits-all fixes.

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Improved Indoor Air Quality

Their system helps reduce mold, mildew, and musty odors that can originate in the crawl space and affect the entire home.

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Energy Efficiency

By sealing and insulating the crawl space, they help homeowners save on heating and cooling costs.

Benefits of Our Systems

Our Customers Say it Best

Ask about our financing options

Cantey Foundation Specialists offers flexible, easy to understand financing options for homeowners. During our in-house visit, your specialist will help you find the financing options that work for YOU!

Fixed

Rate

12.99% for 120mos

6 Mos

No Interest

No Payments

12 Mos

No Interest

With Min Payments

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What is the difference between a vapor barrier and crawl space encapsulation?

A vapor barrier is a plastic sheet on the ground to block ground moisture. Encapsulation is a more complete system that seals the entire crawl space (ground and walls), closes vents, and often includes a dehumidifier and sump pump to create a dry, conditioned space.
Cantey Foundation Specialists’ CleanSpace® vapor barrier comes with a 25-year transferable warranty, indicating its long-term durability. The overall encapsulation system, when properly installed and maintained, is designed for long-lasting performance.
Yes, by preventing humid outside air from entering and by helping to insulate the crawl space, the HVAC system will work more efficiently, leading to noticeable savings on heating and cooling costs.
Signs your crawl space needs attention include musty odors, visible mold, rotting wood, sagging floors, condensation on pipes, and high indoor humidity. A professional inspection by Cantey Foundation Specialists can determine the best solution for your specific situation.
While the encapsulation process prevents future mold and deters pests, Cantey Foundation Specialists can address existing wood rot. For significant mold remediation or active pest infestations, they may recommend a specialist before the encapsulation work begins.

Most encapsulations take 1–3 days depending on crawl space size, drainage needs, and system components.

frequently asked questions vapor barriers and encapsulation

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