Crawl Space Moisture Control

Learn what Virginia Foundation Solutions has to offer your home in Crawl Space Repair & Moisture Control Services.

Permanent Moisture Control Solutions
and Crawl Space Encapsulation Systems

The crawl space is arguably the most important “room” in your home. It contains the support for the entire structure, about 50% of the breathing air that will enter your home, the wires, cables, plumbing, ductwork, and often HVAC systems that make your entire home function properly. Yet, it is commonly the most ignored space in the house. When overlooked, the crawl space becomes an environment for humidity and moisture, which causes mold growth and wood rot. This mold and rot compromises the structural integrity of the wood framing system which leads to cracks in your drywall, uneven floors and doors, and a variety of other problems. Moisture in the crawl space also contributes to the damage of insulation causing higher energy bills, and provides the perfect living conditions for pests, rodents, and snakes.


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Crawl Space Problem Signs:
  • Standing water
  • Moisture & condensation
  • Mold growth
  • Wood rot
  • Pests, rodents, & snakes
  • Cracked drywall
  • Uneven floors
  • Damaged or hanging insulation
  • Damaged vapor barrier
  • Hanging or damaged wires & cables
  • Debris
  • Asbestos


Moisture Issues.

Crawl spaces collect some of the most unlikeable characteristics of any area in a home.  Insects, spiders, snakes, rats and rodents, moisture and water, mold and wood rot, trash and hanging insulation, loose wires and cables run all over many crawl spaces. Does this describe the room under your house? It doesn’t have to. Did you know that because the natural circulation of airflow moves upwards that up to 50% of the air you breathe in your home comes from your crawl space? Does the air in your house have to pass through mold or rodent feces in the crawl space? It’s no wonder that allergies and asthma can come as a result, not to mention more serious breathing issues. Does your crawl space have debris that is flammable feeding from a dryer vent or just left down there to rot by previous half-hearted work? Does your crawl space have loose wires and cables that dangle dangerously close to standing water? If you’re lucky, maybe they aren’t live after being chewed by the rodent friends living down there. All of these factors combined paints a pretty hazardous picture.


Moisture Solutions:
  • Crawl space encapsulation systems
  • Sealed crawl space design
  • Crawl space moisture control
  • Crawl space dehumidifier
  • Vapor barrier
  • Insulation
  • Drainage systems
  • Sump pumps
  • Sealed crawl space vents


Get rid of that nasty crawl space!

People, like ourselves, prefer to think of problems as happening to someone else, but many houses with crawl spaces have some combination of the above mentioned troubles. Although it seems like an uninviting place we want to pretend doesn't exist under our house, it is better to face the problem head on and address the causes bringing all these symptoms with four easy steps.

  1. Any water entering the crawl space must be drained or prevented from entering. Many below grade crawl spaces require drainage and sump pumps which you can read more about in the waterproofing section of this website.
  2. The second factor to handle in a crawl space repair is isolating your home from the dirt bottom which also contains moisture! This is where a durable vapor barrier is important. When it is installed properly, it requires a very detailed application going the proper height up the walls and wrapping around piers and other obstacles. All seams should be sealed so that no moisture can find a way through.
  3. Thirdly, the vents have to be sealed in order to prevent outside air from entering the space (just like a room in your home.) Air carries moisture. When the air’s temperature changes, the humidity in the air also changes. For every degree the air is cooled, the humidity goes up by 2.2%. That is why vented crawl spaces have more moisture problems in the summer. As hot air from outside enters the crawl space and is cooled, the humidity rises. Simply put, it “rains” in your crawl space. Having moisture inside creates a perfect environment for mold to grow, wood to rot, and provides a water source for your pests.
  4. The fourth step to attacking your crawl space moisture concerns is installing a high-efficiency dehumidifier which will condition the air in your crawl space. The dehumidifier will remove any moisture left in the air which will keep the wood that supports your home dry and preserved. A dehumidifier is a crucial component to making sure the air, containing so much moisture, isn’t stagnant in the crawl space. However, the dehumidifier can’t work to remove moisture from your crawl space by itself without first sealing the space. Imagine when you leave the door open in your house while running an air conditioner. Your air conditioner would never be able to fully cool the space or stop running because you would be trying to cool the entire outdoors. This is the same premise. Together, all of these components make up the base solution to home’s moisture control problems.

For a complete encapsulation system recommended by VFS, there are a few other factors to get right, including re-insulation of the space. Your expert inspector can build your crawl space repair solution with you to reach the goals for your home. Allow your family to breathe clean air again, maintain structurally sound dry wood by eliminating mold and wood rot, and even save on energy bills!


 Crawl Space Moisture Control Products:
  • Crawl Space Encapsulation System
  • Crawl Space Dehumidifiers
  • Crawl Space Liner or Vapor Barrier
  • Insulation
  • Drainage Systems
  • Sump Pumps
  • Crawl Space Doors


Equipment to fix my moisture problem.

To transform your crawl space from a dark, damp, moldy environment into a clean and dry space, VFS recommends a full encapsulation system. A crawl space encapsulation system is another way of saying a sealed crawl space. A full system requires many components such as a crawl space dehumidifier, crawl space liner or vapor barrier, and in some cases drainage and insulation. But, these elements alone are not enough to truly encapsulate or seal your crawl space. Many crawl space repair companies suggest a few simple components like liner, a dehumidifier and sealed vents which they call an encapsulation system. In reality, there are a few more essentials that a sealed crawl space design requires to preserve your home’s health.


Installing liner or vapor barrier, a dehumidifier, and sealing crawl space vents IS NOT a crawl space encapsulation system.