Skip to Main Content

Open Crawl Space Vents

Originally installed because of their ventilation advantages, open crawl space vents are now recognized as a source of various household issues. These common features in older homes with crawl spaces are known to contribute to the very problems they were intended to prevent, such as moisture accumulation and inadequate air flow.  

Ignoring open crawl space vents can result in a variety of complications, including moisture build-up, mold proliferation, pest invasion, and more, within your residence. 

Foundation Recovery Systems addresses these challenges directly. Our team is committed to converting your crawl space into a secure, moisture-free, and energy-efficient area of your house through our exclusive crawl space encapsulation products, assuring long-term comfort and stability. 

This page will take you through the background of crawl space vents, the issues they lead to, and the benefits of professional and tailor-made repair solutions for your household. 

What Are Open Crawl Space Vents? 

Open crawl space vents were originally installed to comply with building regulations and prevent moisture-related problems, a concept based on outdated construction norms. 

Nonetheless, these vents often exacerbate rather than resolve issues. Open crawl space vents can result in: 

These problems pose significant risks to both the structural integrity of your home and your health. If you observe these indicators or spot open vents on your house, it’s crucial to get in touch with crawl space specialists like Foundation Recovery Systems without delay. 

Why Your Home Has Open Crawl Space Vents 

Until the latter half of the 20th century, installing vents in crawl spaces was commonly accepted as a standard procedure to promote air flow and reduce moisture and dampness. 

This notion, however, has been proven incorrect over time. It is now understood that crawl space vents are more likely to intensify these issues than to alleviate them. 

Studies in the 1990s showed that these vents allow dampness and moisture to enter and affect a house’s energy efficiency, hindering the maintenance of a consistent indoor climate. 

As a result, the use of crawl space vents has significantly diminished in recent decades. Building codes have evolved to include the sealing of vents and promoting crawl space encapsulation. 

Currently, sealing these vents is a conventional approach in crawl space improvements, recognized as a more effective method to foster a healthier environment within the crawl space, particularly when artificial air circulation is implemented. 

Can You Fix Open Crawl Space Vents? 

Certainly, open crawl space vents can be effectively remedied. However, merely covering them up is not enough; a comprehensive solution for the entire home is necessary for enduring results. 

It is essential to address this issue comprehensively, considering every aspect of your crawl space. Sealing crawl space vents as a component of a complete encapsulation system can transform your damp, unhealthy crawl space into a clean, dry, controlled environment. 

Our specialists at Foundation Recovery Systems boast over 30 years of experience in resolving moisture issues in crawl spaces and providing permanent solutions. We are skilled in identifying the underlying causes in your home and implementing extensive repairs tailored to your specific needs. 

How to Fix Open Crawl Space Vents 

The most straightforward method to tackle the issue of open crawl space vents is through crawl space encapsulation. Yet, it involves more than just blocking or covering the vent. 

The comprehensive crawl space encapsulation process by Foundation Recovery Systems includes: 

Choosing Foundation Recovery Systems means opting for a solution specifically tailored for your home, supported by our proprietary products, renowned for their durability and effectiveness. 

Why Address Open Crawl Space Vents Now 

Addressing open crawl space vents promptly is crucial for several reasons, including: 

  • Preventing Structural Damage: Timely intervention can prevent expensive repairs. 
  • Improving Indoor Air Quality: A sealed and moisture-free crawl space ensures a healthier living environment. 
  • Boosting Energy Efficiency: Adequate insulation and sealing can lead to significant energy cost savings. 
  • Detering Pest Infestations: Pests are less attracted to a dry crawl space. 
  • Increasing Property Value: Homes with resolved crawl space issues are more appealing to potential buyers. 

The specialized solutions from Foundation Recovery Systems combine professional expertise with top-tier products for unparalleled results in the industry. 

Contact Foundation Recovery Systems for Dependable Crawl Space Solutions 

If your home has open crawl space vents, don’t delay in addressing the problem, as it could lead to more serious issues. Foundation Recovery Systems offers comprehensive diagnostics and products to fully encapsulate your crawl space. 

We will inspect your crawl space, identify the core issues, and provide lasting, customized solutions. Our unique products and comprehensive approach distinguish us from standard encapsulation kits. Reach out to us today to schedule a free crawl space inspection and receive a free, no-obligation repair quote. 


While DIY coverage of crawl space vents is feasible, professional services guarantee a thorough and lasting resolution. Foundation Recovery Systems’ process entails complete waterproofing and encapsulation of the crawl space, not just simple sealing or covering of the vents. Contact us for more information and to arrange a free crawl space inspection

The timeframe varies depending on the state of the crawl space and the solutions applied, but typically, we can complete the job in a few days. The teams at Foundation Recovery Systems work efficiently to minimize any inconvenience. Discover more and get a no-obligation estimate and precise project timeline during a free inspection

The cost depends on the size of your crawl space, its current condition, and the specific repairs required. Investing in professional solutions from Foundation Recovery Systems ensures good value and enduring results. We offer free inspections, no-obligation repair estimates, transparent pricing, and a variety of financing options. Contact us for further information. 

FRS service area

Our Locations

Cedar Rapids Location

3349 Southgate Ct SW,
Cedar Rapids, IA 52404
(319) 220-5034

Central Illinois Location

2064 N Woodford St.
Decatur, IL 62526

Des Moines Location

2401 SE Creekview Dr.
Ankeny, IA 50021
(515) 373-8491

Kansas City Location

7280 NW 87th Terrace, Suite C-210
Kansas City, MO 64153
(816) 774-1539

Lee's Summit Location

211 SE State Route 150
Lee's Summit, MO 64082
(816) 774-1539

Moberly Location

1872 State Hwy M Moberly
MO 65270
(660) 202-8662

Springfield Location
3020 N. Martin Ave.
Springfield, MO 65803
(417) 612-8286
St. Louis Location

1625 Larkin Williams rd.
Fenton, MO 63026
(314) 207-9995