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Why Is My Crawl Space So Humid?

In homes across South Carolina and Western North Carolina, crawl space humidity is a common yet serious issue that can cause extensive damage and health concerns.  

Mount Valley Foundation Systems, with years of local experience, assists homeowners in addressing these challenges. Our team performs in-depth inspections to identify the root causes of humidity and offers custom encapsulation solutions for effective and lasting control.  

This page will guide you through understanding crawl space humidity, its implications, and how to resolve them with expert help. 

Understanding Crawl Space Humidity 

Crawl space humidity is the excess moisture accumulation in the area beneath your home. This part of your house, nestled between the ground and the first floor, is naturally prone to dampness due to soil proximity. High humidity levels, particularly over 60%, can cause several issues, including: 

Proactively managing these issues is essential for preserving your home’s structural integrity and ensuring a healthy living environment. 

What Leads to Crawl Space Humidity? 

Crawl space humidity in South Carolina and Western North Carolina can arise from multiple sources: 

  • External Humidity: Humid air from outside entering through vents. 
  • Water Intrusion: Leaks and rainwater contribute to increased moisture. 
  • Soil Dampness: Exposed soil floors release moisture into the air. 
  • Unsealed Vents: Allow humid outdoor air to enter and condense. 
  • Climate Control Lapses: Inadequate insulation and waterproofing allow moisture retention. 
  • Missing Vapor Barriers: Permit ground moisture into the space. 
  • Poor Drainage: Causes water accumulation. 

Addressing these factors effectively is key to maintaining your home’s condition and the well-being of its occupants. 

Resolving Crawl Space Humidity 

Crawl space humidity can be managed with a strategic approach. While temporary DIY fixes might offer some relief, they often fall short in the long term.  

Mount Valley Foundation Systems provides specially designed crawl space encapsulation systems to permanently resolve humidity and moisture issues. Our comprehensive solutions target moisture at its source, ensuring a dry, healthy living environment. 

Mount Valley Foundation Systems’ Approach to Crawl Space Humidity 

Our process includes: 

We offer advanced, proprietary products specifically designed to tackle crawl space humidity challenges effectively. 

The Importance of Addressing Crawl Space Humidity Now 

Promptly dealing with crawl space humidity is crucial to: 

  • Prevent structural damage and decay. 
  • Avoid health risks from mold and allergens. 
  • Discourage pest infestations. 
  • Improve air quality and eliminate odors. 
  • Enhance energy efficiency and reduce costs. 
  • Preserve your property’s value. 

Delay can exacerbate these issues, so it’s advisable to seek Mount Valley Foundation Systems’ comprehensive solutions right away. 

Reach Out to Mount Valley Foundation Systems for Reliable Crawl Space Solutions 

Crawl space humidity is a critical concern as it can significantly affect both the structural soundness of your home and the well-being of your family. Excessive moisture in the crawl space can lead to the deterioration of foundation materials, compromising the structural integrity of the building. This damp environment also fosters the growth of mold and mildew, which can negatively impact indoor air quality and pose health risks, particularly for those with allergies or respiratory issues. 

Mount Valley Foundation Systems addresses these concerns with its effective encapsulation system. Our solutions are meticulously crafted to cater to the specific needs of each home, ensuring optimal effectiveness. Schedule a free inspection with us today. 


Encapsulation plays a crucial role in managing crawl space humidity. By integrating waterproofing and dehumidification techniques, encapsulation effectively reduces humidity levels. This process involves sealing off the crawl space from external elements, preventing water and moist air from infiltrating and creating damp conditions. As a result, encapsulation not only lowers humidity levels but also contributes to a drier and healthier under-home environment, safeguarding your property against moisture-related damage. Contact us to learn more

The time required to effectively address crawl space humidity issues can vary depending on the extent of the problem and the size of the area. However, we are committed to providing quick and efficient solutions. Typically, our encapsulation process, which is a cornerstone of moisture control, can be completed within several days. This quick turnaround ensures minimal disruption to your daily life while significantly improving your home’s environment. 

For a healthy and safe home environment, it is ideal to maintain crawl space humidity levels within the range of 40-50%. Excessive moisture can lead to various issues, including mold growth and structural damage. To assist in achieving and maintaining these optimal levels, we offer state-of-the-art dehumidifiers and comprehensive waterproofing solutions tailored to your home’s specific needs. 

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Our Locations

Asheville Location

53 N Market St, Suite 5
Asheville, NC 28801

Augusta Location

630 Ellis Street, Suite 2-B
Augusta, GA 30901

Charleston Location

1850 Ashley River Rd
Charleston, SC 29407

Columbia Location

2110 Commerce Drive
Cayce, SC 29033

Greenville Location

300 South Ave
Spartanburg, SC 29306

Myrtle Beach Location

1704 N. Oak Street, Suite 3
Myrtle Beach, SC 29577

Savannah Location

6606 Abercorn St., Suite 211
Savannah, GA 31405