Crawl Space Repair & Encapsulation
Crawl space repair and encapsulation ensures your South Carolina home remains safe, stable, and dry. Enhance indoor air quality and create a healthier home environment with tailored repairs from Mount Valley Foundation Services.
Get Your Free EstimateCrawl Space & Encapsulation Problem Signs
Address problem signs and protect your home with specialized crawl space repair and encapsulation solutions from local experts. Learn more about how Mount Valley Foundation Services can help.
Remedying Sagging Floors in Your Home
Sagging floors are telltale signs of foundational distress. Mount Valley’s IntelliJack™ Crawl Space Jacks provide a durable fix.
Rotting Wood
Preserve your home's integrity with Mount Valley Foundation Services' expert wood rot solutions, ensuring durability and safety.
Musty Crawl Space Smells
Mount Valley Foundation Services offers specialized solutions and proprietary products to effectively address musty odors in your crawl space.
Mold in Crawl Spaces
Crawl space mold can lead to severe health issues. Rely on Mount Valley Foundation Services for expert solutions.
Notice musty odors or sagging, uneven floors? These signs often point to crawl space foundation problems. Many southern homes in Charleston, Columbia, Greenville, and Savannah were built with crawl space foundations to elevate the house from the ground. However, these spaces can become volatile environments, potentially causing structural damage and health risks due to mold growth and pest infestations.
Are you curious whether basement crawl space encapsulation is right for your home? While the term might sound logical, there isn’t actually a basement crawl space encapsulation process because basements and crawl spaces are two distinct foundation types. Crawl spaces are small, vented, or sealed spaces beneath your home, while basements are larger, enclosed areas. Encapsulation applies to crawl spaces, addressing moisture, mold, and structural concerns.
Causes of Crawl Space Damage
Crawl space foundation issues often stem from construction practices during the home's initial build. Additional causes of crawl space foundation damage include:
Crawl spaces typically have dirt crawl floors that are not covered. Simply placing a 6-mil plastic liner on the floor, which is a minimal code requirement, will not cut it. This liner is thin, allows water and moisture to collect, mold to grow and thrive, and leads to a variety of damage. Other liners with thicknesses of 10 and 12-mil are only slightly better, but they still can easily tear and fail.
Water and moisture also can have a significant impact inside your home, as well. If you have a dirt crawl space with open vents, this allows outside air, water, and pests inside the crawl space directly underneath your house to cause a host of problems. More than 50% of the air you’re breathing indoors comes from below-grade areas like crawl spaces. So, whatever is in your crawl space such as mold, moisture, and humidity, also is in the rest of your house and affecting you.
One example of a structural impact is with the support system under your house. If wooden support systems become saturated with water or exposed to high humidity and excessive moisture, they can rot and buckle. Metal supports also will corrode and rust in the same conditions. All this then leads to sagging, uneven floors and problems with hardwood floors.
The stack effect is the airflow pattern in your house from bottom to top. Air pressure also comes into play. Air flows from areas of high pressure to areas of low pressure. When there is a greater difference between indoor and outdoor temperatures, the more significant this airflow becomes.
True, you can’t actually see airflow, but it might be helpful to have a way to visualize the stack effect to better understand it. Your home certainly is not located in the northern portion of the country, but a lot of good information can be gained from The Cold Climate Housing Research Center’s YouTube videos, including “Your Nothern Home: Stack Effect” that illustrates the stack effect.
Award-Winning Service
- 5/
- 5/
- 5/
- 5/
- 5/
Very informative and helpful in understanding the maintenance.
Very informative and helpful in understanding the maintenance.
- 5/
- 5/
- 5/
- 5/
- 5/
Beautiful work . Fast easy and beyond any of my expectations. Matt Blaine and Donald did excellent work and explained every step of the…
Beautiful work . Fast easy and beyond any of my expectations. Matt Blaine and Donald did excellent work and explained every step of the way . I couldn't be happier with the work clean up and attitude of my crew . These guys need a raise!
- 5/
- 5/
- 5/
- 5/
- 5/
We could not speak more highly of Dustin. Dustin is thorough, detailed, well informed, yet patient and happy to answer any questions, and…
We could not speak more highly of Dustin. Dustin is thorough, detailed, well informed, yet patient and happy to answer any questions, and even proactively educates his customers when they don't know what to ask. We wish all businesses conducted themselves with the care that Dustin brings to his work. Thank you!
- 5/
- 5/
- 5/
- 5/
- 5/
Andres Bookert And his team completed their work quickly and efficiently. They cleaned up all the debris and hauled the debris away. Good…
Andres Bookert And his team completed their work quickly and efficiently. They cleaned up all the debris and hauled the debris away. Good communication and friendly service during the entire process!!!
- 5/
- 5/
- 5/
- 5/
- 5/
I just had Elliot and Luke out to do a free estimate for some foundation work on my front porch. Very professional and respectful! Very…
I just had Elliot and Luke out to do a free estimate for some foundation work on my front porch. Very professional and respectful! Very happy with them and what they provided today!
- 5/
- 5/
- 5/
- 5/
- 5/
Andy, Darren and Josu installed new bracing under our house. They were on some starting and finishing. They explained what they were doing …
Andy, Darren and Josu installed new bracing under our house. They were on some starting and finishing. They explained what they were doing every step of the way. Overall it was a good experience.
- 5/
- 5/
- 5/
- 5/
- 5/
Oscar, Kemper, Billy, Derek, and Jesus did a phenomenal job installing 9 helical piers to support our foundation. Professional, efficient,…
Oscar, Kemper, Billy, Derek, and Jesus did a phenomenal job installing 9 helical piers to support our foundation. Professional, efficient, and highly motivated! Would love to have them do any further work!
- 5/
- 5/
- 5/
- 5/
- 5/
We had Mount Valley Foundation complete a foundation repair on February 9, 2026. Kevin A, Chris W, and Mason T, were the workmen who…
We had Mount Valley Foundation complete a foundation repair on February 9, 2026. Kevin A, Chris W, and Mason T, were the workmen who completed our job. They were polite, attentive, and worked like a well-oiled machine. They had great attention to detail, replaced yard items that had to be moved, and even raked the marks left by their equipment. I have rarely seen a team that did as good.
- 5/
- 5/
- 5/
- 5/
- 5/
Reinforce floor beams using steel. 2 day repair. Replaced pump in sump. TJ, James and Javon were the crew that did my work.
Reinforce floor beams using steel. 2 day repair. Replaced pump in sump. TJ, James and Javon were the crew that did my work.
- 5/
- 5/
- 5/
- 5/
- 5/
Great person to send to my home. Chip was very smart and knowledgeable. The company needs more people like him.
Great person to send to my home. Chip was very smart and knowledgeable. The company needs more people like him.
- 5/
- 5/
- 5/
- 5/
- 5/
I've had several different services from Mount Valley and am consistenly impressed with the quality employees they hire – professional,…
I've had several different services from Mount Valley and am consistenly impressed with the quality employees they hire – professional, competent & responsive.
- 5/
- 5/
- 5/
- 5/
- 5/
Joe and Mike showed up on time, explained everything in detail, did a great job protecting our yard, and got the job done quickly. Both…
Joe and Mike showed up on time, explained everything in detail, did a great job protecting our yard, and got the job done quickly. Both were extremely professional and thorough with their approach. Highly recommend.
- 5/
- 5/
- 5/
- 5/
- 5/
Sands Williamson met me at one of my listings in Aiken this afternoon. He absolutely went above and beyond to make sure that the foundation …
Sands Williamson met me at one of my listings in Aiken this afternoon. He absolutely went above and beyond to make sure that the foundation in this home was level and he even took care of a couple of issues in the crawlspace. As a Realtor, it’s often hard for me to find honest and reliable trades people. But Sands is definitely one that deserves five stars. I would highly recommend him and his company for any foundation or crawlspace issues.
- 5/
- 5/
- 5/
- 5/
- 5/
I needed to have my foundation repaired and called several companies for estimates. Their rep showed up on time, was respectful,…
I needed to have my foundation repaired and called several companies for estimates. Their rep showed up on time, was respectful, knowledgeable and took the time to actually HEAR us. There were other companies that were cheaper, but you do get what you pay for. The work started on schedule and finished on schedule as well. They continue to come out and check the job annually (at a very small fee of about an $150) since they guarantee their work for the life of the house. I happily recommend them to anyone who needs that kind of work done.
- 5/
- 5/
- 5/
- 5/
- 5/
A week before Christmas, I had a rat invasion in the crawlspace that was encapsulated by Mount Valley. Marge came out several times to help …
A week before Christmas, I had a rat invasion in the crawlspace that was encapsulated by Mount Valley. Marge came out several times to help me cover the holes where a rat had eaten through the encapsulation material. She was great!! I highly recommend Mount Valley and their great customer service! Marge should be commended for her excellent tireless efforts to help me with my problem. We are now rat, free and encapsulation has now been restored back to normal.
- 5/
- 5/
- 5/
- 5/
- 5/
We discovered a crack in the foundation that ran along the interior of the outer walls of the house. I called Mount Valley and Dustin came…
We discovered a crack in the foundation that ran along the interior of the outer walls of the house. I called Mount Valley and Dustin came to inspect. One corner of the foundation had dropped half an inch. I decided to contract their services. Yiannis and Landon arrived a few days later. They walked me through the repair process before proceeding and did a fantastic job. Before they left we walked through the work area and presented the results. I am impressed with quality of the work done. I will be recommending Mount Valley to everyone I know.
- 5/
- 5/
- 5/
- 5/
- 5/
MV encapsulated our crawlspace, replaced joists, and installed new subfloor. The entire experience was excellent. Matt and Andrew were…
MV encapsulated our crawlspace, replaced joists, and installed new subfloor. The entire experience was excellent. Matt and Andrew were incredible. Their work was perfect, beyond our expectations. We would highly recommend MV. The entire organization was outstanding to work with.
- 5/
- 5/
- 5/
- 5/
- 5/
Excellent, knowledgeable, reliable, dedicated, honest, trustworthy service and proficiency in managing foundation repair, restructuring,…
Excellent, knowledgeable, reliable, dedicated, honest, trustworthy service and proficiency in managing foundation repair, restructuring, reinforcing, and stabilization! Friendly, courteous, and respectful service that will also span years of followup care, hereinafter. These are very qualified individuals, and they were good at their tasks and responsible to manage the care of my home! I would recommend them to anyone!!! Let me also spotlight Jalen, Garrett, and Hunter, the three men that accomplished all of the above-mentioned labor and results! They were terrific people to deal with, too, and I think I may have made some long-term friends in the process as we interacted well together!!! Let me likewise highlight the initial phase of getting the financing approved and writing the contract and getting the engineering in progress and orchestrating the whole project, all that was done by Carlton, who was tremendous in working all of this out! I am blessed to have had his assistance to manage this needful repair!!!
- 5/
- 5/
- 5/
- 5/
- 5/
Elliott was our sales representative and listened to all my needs/concerns to follow through with our full encapsulation. Nathan directed…
Elliott was our sales representative and listened to all my needs/concerns to follow through with our full encapsulation. Nathan directed his team with extreme detail and 0rofeesionalism during entire installation. Thank you!! 😁
- 5/
- 5/
- 5/
- 5/
- 5/
I had foundation repair completed just this morning. My crew (Tommy, Jamison, Hector) was excellent! The job was completed timely, yet…
I had foundation repair completed just this morning. My crew (Tommy, Jamison, Hector) was excellent! The job was completed timely, yet efficiently. Communication and Customer Service were top notch, and the process was explained thoroughly. I would recommend to anyone who is having foundation issues.
Crawl Space Encapsulation & Repair Solutions
Mount Valley Foundation Services offers warrantied crawl space repair and encapsulation solutions tailored to your needs and budget. Our services include:
Crawl Space Sump Pump
Discover how Mount Valley Foundation Services' crawl space sump pump eliminates standing water for a more stable home environment.
Crawl Space Dehumidifier
Achieve superior crawl space humidity control and moisture management with Mount Valley Foundation Services' AquaStop™ Air System.
Crawl Space Vapor Barrier
Wet, damp crawl space? Seal it with a durable vapor barrier installation from Mount Valley Foundation Services. Schedule a free inspection!
Crawl Space Drainage
Ensure the integrity of your home with Mount Valley Foundation Services' CrawlDrain™ system – a solution for crawl space drainage.
Is Crawl Space Repair and Encapsulation Right for Me?
Open crawl space vents were initially designed to improve airflow. However, these vents often cause more harm than good. Instead of reducing moisture, vents allow humid air infiltration, leading to condensation, mold, and wood rot.
The humid climates in South Carolina, North Carolina, and Georgia exacerbate these problems, weakening home structures and creating health risks.
Investing in professional crawl space repair and encapsulation solutions, including vapor barriers, vent covers, interior drainage systems, sump pumps, and dehumidifiers, helps combat these issues. Contact Mount Valley Foundation Services today to schedule your free inspection and learn more about creating a safer, healthier environment for your family.
Crawl Space Repair FAQs
We are committed to your satisfaction and your home’s safety. That is why we only use the very best repair solutions. The products we use are manufactured right here in the United States, and they are tested and proven to effectively work in keeping your crawl space clean, dry, safe and healthy. All these solutions also are designed to work together to give you the most bang for your buck and prevent any further problems.
Here is how we tackle crawl space problems, as well as the solutions we use and how they work:
- Address Leaking Water — To address seeping water, we first need to catch the water, then get this water to a sump pump system, and then send this water away from the home.
Our specially designed CrawlDrain™ perimeter drainage system is placed in the dirt crawl space floor around the perimeter to catch seeping water from the walls and floor. The drainage channels then direct this water into the SafeDri™ Crawl Space Sump Pump System, which then pumps the water out of the crawl space and away from the home. A FreezeGuard™ also can be attached to the exterior sump pump discharge line to prevent flooding if the line should freeze or become blocked.
- Seal the Crawl Space from Outside Elements — It is important to seal your crawl space from outside air, water and pests. The first step is having durable vent covers placed over the crawl space vents.
Then, a heavy-duty moisture and vapor barrier is installed. Our CrawlSeal™ is a true 20-mil liner rated above 25-mil strength at the seams. This liner, which is three times thicker than builder’s grade liner, is used to completely isolate the crawl space from the earth. CrawlSeal™ prevents moisture and vapor intrusion, is waterproof, and has been treated to resist mold.
Additionally, thick drainage matting can be placed on the crawl space floor before the encapsulation process to help direct water to the perimeter CrawlDrain™ system, as well as enhance the strength of the CrawlSeal™ liner.
- Properly Insulate the Crawl Space — Rigid ExTremeBloc™ panels placed on crawl space walls will better insulate the area and will not fail or develop mold like fiberglass insulation. These panels resist moisture, and an integrated termiticide is added to deter termites below grade. CrawlSeal™ also helps insulate the crawl space, and spray foam can be added to rim joists to seal gaps around the perimeter of your foundation. These insulation methods help prevent wood rot and enable termite treatments.
- Condition the Air — Our low-profile crawl space dehumidifier is powerful and energy efficient. It effectively works to clean and filter the air, control moisture and humidity, and reduce odors and potential mold growth. This dehumidifier also is self-draining, meaning there aren’t any reservoirs or buckets to have to worry about emptying. The unit can be directed to drain into the crawl space perimeter drainage system or sump pump system, or a condensate pump can be installed.
- Reinforce Support Systems — Wooden floor supports and light-duty jack posts commonly fail in wet and humid crawl spaces. Our durable IntelliJacks™ are made of galvanized steel, making them more reliable supports that can stabilize and lift sagging floors and floor joists back to level.
When you contact us, you can speak to one of our customer care representatives about your crawl space concerns. We will then work with you to schedule an appointment for a free inspection and estimate with one of our certified field inspectors.
Here’s what you can expect during this consultation. The inspector will:
- Complete a thorough evaluation of your home’s interior and exterior. This includes going into the crawl space to check the condition of the area including any water intrusion, damage, pests, etc.
- Discuss his findings with you, as well as your goals with a repair project.
- Offer customized solutions that best fit your repair needs.
- Provide you with a proposal of recommended solutions before leaving your house.
- Discuss payment and financing options with you.
Then, if you decide to move forward with a repair project, we will work to schedule your repairs with one of our highly trained installation crews. Our crew members will treat your home as their own, with the utmost care and respect. They will use world-class solutions for your repairs, and their work is not complete until you are 100% satisfied with the job. If something crops up after installation, we will return to fix any issues. We also offer various service and maintenance opportunities to protect our work and your home.
Along with writing a review about your experience with us, it would mean the world to us if you would refer us to your friends and family!
Now that you’ve seen what nastiness could be lurking underneath your feet and the toll it can take on your home and your family, aren’t you motivated to get rid of it? As tempting as it might be to head out to your local home improvement store to gather supplies, pause for a moment.
Crawl space repair is not something you can tackle in a weekend, no matter how handy you are. A lot can go wrong, and we have seen many problems result from fast fixes. Especially concerning real estate transactions, quick fixes can raise red flags. You’ll then have to spend more time and money to repair these issues. It’s best to leave these projects to professional contractors so the problems will be fixed correctly the first time around.
We encourage you to educate yourself to make the best decision and sound investment with trustworthy repair solutions from a reliable contractor.
Why would you want disgusting conditions underneath your home? That alone should be enough for you to want to correct the problems. But you might be wondering, “what’s in it for me?” A lot, actually. There are so many benefits of having a clean crawl space, which you can read about in our blog, “10 Reasons to Clean Your Crawl Space This Season.” Here are a few of the major perks:
- Health — A cleaner crawl space means improved health for you and your family. Especially if anyone in your house suffers from asthma or allergies, a cleaner crawl space can help prevent flare-ups and sickness. If you choose solutions like a dehumidifier, the air quality will be greatly improved throughout the entire home.
- Structural Integrity — Compromised support systems and sagging floors are dangerous and could result in significant structural damage and safety hazards. By shoring up the support system in your home, you will have a more stable living environment for your family.
- Energy Efficiency — When you invest in proper, reliable crawl space encapsulation and insulation to reduce energy loss, you can save between 30 and 50% on your energy bills. (Source: Clean Crawls)
- Functional Space — Once your crawl space has been properly waterproofed, sealed and insulated, you have an area of your home you can use in a new way. You’ll be able to store your belongings in the crawl space without worrying about them being damaged by water, mold or pests.
- Real Estate Value — There are a lot of factors that impact a home’s resale value, but issues with the structure, any water intrusion and crawl space problems are all areas you need to be aware of. When selling your house, it is important to disclose any known past or current damage. This sets clear expectations regarding the quality and condition of the home. Homeowners selling their house in South Carolina are required to provide a written disclosure statement to the purchaser noting any known defects. This includes information on the foundation, basement and other structural components, as well as current or prior infestations of wood destroying insects or organisms. (Source: Nolo)
If you take a look online for instructions on how to fix your crawl space vapor barrier, you will find there are many DIY tutorials available. Many homeowners think installing a vapor barrier will not take long and won’t be too complicated. After all, it is possible to purchase all the materials you need to do it yourself at your local expert supply store.
At Mount Valley Foundation Services, we have installed many crawl space vapor barriers over the years. We can tell you that this is not an easy task, and it is not something that many people can figure out just by watching an online tutorial. If anything goes wrong or you make a mistake, you will still have to contact a professional to complete the task. Therefore it is best to contact our team and have your new vapor barrier installed by members of the oldest foundation services companies in all of South Carolina.
Contractors once believed that placing vents on the walls of crawl spaces would help improve the airflow in these dark and humid areas. But over the years, we have learned that crawl space vents do more harm than good. They allow moisture to enter into the crawl space, which can promote mold growth and affect the internal temperature of your home, causing your energy rates to rise.
Crawl space vent covers are the ideal solution to this problem, and they do not take long for our professionals to install. Our crawl space vent covers are made from solid and durable materials, and they are designed to prevent moisture and pests from entering your crawl space.
If you think you could benefit from installing our vent covers, get in touch with us at Mount Valley Foundation Services today.
Why Crawl Space Repair and Encapsulation Are Needed
Crawl space problems affect your home and your family. Here are just a few of the benefits of crawl space repair and encapsulation:
Avoid Exposure to the Elements
Vented crawl spaces are exposed to the region’s exterior elements, including summertime heat and humidity, year-round precipitation, and coastal storms. Crawl spaces can sustain flooding and moisture-related damage. However, your crawl space can withstand the harshest weather challenges with airtight vent covers and encapsulation solutions.
Prevent Structural Damage and Instability
Crawl space foundations rely on support systems of beams, girders, and floor joists. Excess water and moisture can lead to wood rot and attract pests like termites, which damage these wooden structures. These issues often result in sagging or uneven floors. Crawl space repair and encapsulation manage moisture and protect these critical supports while specialized support jacks stabilize, reinforce, and lift sagging floor joists.
Deter Pests
Pests and rodents are attracted to isolated, dark, moist areas like crawl space foundations. Managing moisture with crawl space repair and encapsulation solutions, including airtight vent covers, door installation, vapor barriers, and durable insulation panels, reduces pest infestations and damage.
Crawl Space Repair and Encapsulation Tips and Mistakes
Mistakes to Avoid:
- Using Sand and Fans: While sand can absorb liquid, spreading it in a crawl space only conceals the issue by covering the moist ground soil. This method does not remove the moisture or address its source. Similarly, installing fans to circulate air may seem helpful; however, it often exacerbates the problem by increasing the presence of unconditioned, humid air.
- Investing in Improper or Partial Encapsulation: Saving money on repairs for a rarely seen crawl space area can be tempting, but using reliable products is crucial. Some companies or hardware stores sell liners covering only the floor or walls, not the entire crawl space area. Many retail outlets offer thin vapor barriers with a minimal 6-mil thickness. These insufficient liners are prone to tears, moisture, mold, and other damage.
- Implementing DIY Solutions: Many DIY solutions provide temporary relief and do not address the underlying causes of crawl space foundation problems. Since crawl space areas are limited and often store essential HVAC systems, plumbing, and ductwork, it’s best to rely on professionals for repair. Crawl space foundations can also harbor unsafe conditions like mold and pests, making it challenging and hazardous to navigate alone. Professionals have the expertise and safety gear to provide thorough crawl space inspections and repairs.
Tips to Consider:
- Manage Exterior Drainage: Exterior gutters and downspouts are your first defense against water and moisture infiltration. Inspect and clean these systems at least twice yearly – in the spring and fall. Ensure downspouts and the extensions angle downward and away from the foundation to prevent water pooling. Landscape and yard grading should also slope down and away from the house to ensure proper water flow.
- Do Not Navigate the Crawl Space: Crawl space foundations are typically one to three feet high, making navigation challenging. Crawl spaces often store essential fixtures like plumbing pipes and HVAC equipment and harbor hazardous pests and rodents. If you notice signs of damage or the need for crawl space repair, contact a professional to ensure safety.
- Trust Local Crawl Space Repair Experts: Trusting professionals for crawl space repairs ensures safety and a thorough job. Mount Valley Foundation Services teams are highly trained and experiences in crawl space inspection and problem diagnosis. We install specialized solutions tailored to your home’s needs and your budget.
Providing Expert Crawl Space Repair & Encapsulation in South Carolina, North Carolina, and Georgia
Pennsylvania trusts Mount Valley for reliable basement waterproofing, crawl space, foundation, and concrete repair services. Contact us for a free inspection!
Top Cities We Serve
Our Locations
630 Ellis Street, Suite 2-B
Augusta, GA 30901
1850 Ashley River Rd
Charleston, SC 29407
401 Gamble Dr., Suite B
Columbia, SC 29209
300 South Ave
Spartanburg, SC 29306
1704 N. Oak Street, Suite 3
Myrtle Beach, SC 29577
6606 Abercorn St., Suite 211
Savannah, GA 31405