Crawl Space Moisture Control

Crawl Space Encapsulation Company Serving Richmond, Williamsburg, Henrico & Nearby

Achieve a Healthier, More Sanitary Living Environment with Crawl Space Moisture Control

Why is this a problem?

  • Mold and mildew growth: A damp environment is very unhealthy and destructive. Mold thrives and reproduces by producing airborne spores by the millions, some of which are toxic.
  • High humidity: High humidity is absorbed into the wood structure and moves upward into the hardwood floors which causes the floors to "cup". Cupping is when the hardwood floor absorbs so much moisture the wood swells and pushes upward at its edges.
  • Structural damage: Rot and decay occur in damp environments causing structural damage.
  • Higher energy costs: Heating and cooling costs are higher in a home with a vented dirt crawl space.
  • Insects and critters: Insects and critters of all kinds love damp environments and wet materials.

What's the solution?

CleanSpace® Authorized Dealer

The way to protect a home with a crawl space is to seal the crawl space with an encapsulation system. An Encapsulation Crawl Space System completely isolates your home from the earth and dramatically reduces the humidity level. In most cases, this has the effect of eliminating mold growth, rot, and critters from your crawl space, and making the whole house healthier.

Our encapsulation crawl space system installation is a 6 step process:

  1. Our trained installers will remove wood and organic materials from your crawl space floor. Rocks and uneven surfaces are leveled, depending on the crawl space conditions.
  2. The crawl space liner is carefully cut and installed. The workers will usually be working in their socks once the floor piece is laid out to keep the liner clean. That's how clean your crawl space will be!
  3. Small holes are drilled into the top of your crawl space walls and nylon fasteners are installed to permanently secure the liner to the walls.
  4. The top edge of the liner is sealed to the walls with a polyurethane sealant. All seams are sealed with special 4'' wide sealing tape and/or sealant made for the liner. It is also sealed around other objects such as pipes, columns, and piers with any combination of sealants or concrete.
  5. The liner is completely sealed over the floor and walls to fully isolate your home environment from the earth. The liner is a heavy 20 mil thick material similar to a pool liner. It is manufactured in 7 layers - a blend of high-density polyethylene, low-density polyethylene, and two layers of polyester cord reinforcement. The bright white finished side really brightens a crawl space and allows you to easily see that your crawl space is free of mold, insects, and dirt.
  6. Finally, the vents will be closed up to save you money on your energy bills.

Before and After
  • Mold Remediation in Mineral, VA Crawl Space
    Mold Remediation in Mineral, VA Crawl Space

    Before encapsulating this crawl space, we treated the joists with an antimicrobial called Shockwave. This product is a hospital-grade antimicrobial designed to kill the mold and mildew growth. 

  • Crawl Space Encapsulation in Bruington, VA
    Crawl Space Encapsulation in Bruington, VA

    This Bruington, VA client contacted us about repairing moisture damage in their crawl space. Moisture had caused mold and mildew growth, was absorbed in the insulation which held it against the floor joists, the material began to delaminate and fall away from the floor. 

    All debris and insulation was removed from the crawl space, microbial growth was treated, the vents, sill plate, & rim band were sealed, the foundation walls were insulated with closed cell spray foam insulation and a dehumidifier was installed to control the relative humidity. The homeowners no longer need to worry about moisture damage in their crawl space and have the added benefit of warmer floors in the winter and reduced drafts in the home. 

  • Encapsulating a Henrico, VA Crawl Space
    Encapsulating a Henrico, VA Crawl Space

    We met this homeowner at a home show, where they asked us to come to inspect their crawl space because they were interested in encapsulating it due to moisture and mildew-mold concerns. This section of the crawl space is under an addition. The vapor barrier is unsealed, allowing moisture to rise from the ground and contribute to high relative humidity. Microbial growth is beginning on the floor joists and the fiberglass insulation is beginning to sag and fall.

    The old materials have been removed, vents sealed, and the sill plate and rim band have been sealed as well. The CleanSpace vapor barrier has been installed with all seams overlapped and sealed. The moisture barrier is also run up the walls 6-8 inches above outside grade. The walls are prepped for spray foam insulation to be applied. 

  • Sealing and Insulating a Crawl Space in Henrico, VA
    Sealing and Insulating a Crawl Space in Henrico, VA

    A homeowner in Henrico, Virginia called us out to insulate and seal their crawl space from any outside influence. We installed a heavy-duty CleanSpace vapor barrier over the dirt floor, wrapped it around all piers, and mechanically fastened it to the foundation walls. This will help to keep the earth's moisture from rising into the area and increasing the relative humidity. We also covered any open vents and applied a spray foam over the foundation walls, which at an inch and a half thick will act as an air barrier and vapor retarder. With the walls and dirt flooring sealed and insulated, the crawl space will be less affected by outside air and moisture.

  • Mold in New Kent, VA Crawl Space
    Mold in New Kent, VA Crawl Space

    As the insulation acts as a sponge, it holds moisture against the wood joists raising the moisture content of the joists. Mold requires organic material, warm temperatures, and relative humidity above 60% to grow. Often we see mold growing on the paper backing of the insulation and on wood joists in the crawl space. As the moisture content in the joists increases, the probability for wood rot becomes more likely. Once the joists reach 19% moisture wood rot begins. An antimicrobial called Shockwave is sprayed onto the joists to kill the mold. Once the encapsulation is complete and the dehumidifier is installed it will be set to turn on before the humidity in the crawl space reaches 60% (The ideal point for mold to grow). The Encapsulation system will help prevent ideal conditions for mold to grow from occurring and make the home healthier and more comfortable.

The finished liner is tough enough for you to crawl on it and use your crawl space for storage. Servicemen can crawl on it without worrying about putting holes or tears in the liner. It completely stops moisture penetration. The result is an attractive, bright, tough, impervious liner and a healthy home above it.

The Drying Co./ThermalTec proudly services the areas of Midlothian, Williamsburg, Henrico, Richmond, Glen Allen, Mechanicsville, Chester and nearby.

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our service area

We serve the following areas

Our Locations:

The Drying Co./ThermalTec
236 Industrial Blvd
Suite A
Toano, VA 23168

The Drying Co./ThermalTec
Mailing Address
P.O. Box 637
Toano, VA 23168
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