The Homeowner’s Guide to Open Crawl Space Vents

Damp, dirty crawl space with an open vent.

Initially thought to keep air flowing in your crawl space, open vents are now known to actually cause moisture issues below your home. They can be substituted with more efficient, safer alternatives.

With our extensive experience and dedication to long-term solutions, AFS tackles the issues caused by open vents effectively. Our team converts your crawl space into a secure, moisture-free, and energy-efficient area.

This page will explain the history of crawl space vents, the difficulties they present, and the advantages of professional, tailored repairs for your home.

What Are Open Crawl Space Vents?

Originally intended to meet building regulations and combat moisture, open crawl space vents are based on outdated construction norms. Yet, these vents often lead to more issues than they resolve, including:

Crawl space vent detaching from the wall.

These problems can significantly jeopardize your home’s structural soundness and your health. If you observe these symptoms or spot open vents on your house, it’s crucial to contact crawl space professionals like AFS immediately.

Why Your Home Has Open Crawl Space Vents

Open crawl space vent on a crawl space foundation wall.

Until the mid-20th century, it was a common belief that installing vents in crawl spaces would improve airflow and reduce moisture and dampness. More recently, this has been proven incorrect.

Studies in the 1990s showed that these vents allow moisture and dampness to enter and negatively affect a home’s energy efficiency, making consistent indoor temperatures hard to maintain.

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

Today, sealing these vents is a standard practice after a thorough crawl space inspection. Closed vents are recognized as a more effective way to create a dry environment in the crawl space.

Can You Fix Open Crawl Space Vents?

Indeed, open crawl space vents can be effectively remedied. However, trying to simply cover them with DIY methods won’t cut it; a comprehensive home solution is essential for enduring results.

Addressing this issue requires a holistic approach, considering every aspect of your crawl space. Sealing crawl space vents as part of a complete encapsulation system can turn your damp, unhealthy crawl space into a clean, dry, conditioned area.

With over 20 years of experience resolving crawl space moisture issues, our specialists at AFS are adept at identifying the underlying causes of your home’s problems and implementing thorough repairs tailored to your needs.

How to Fix Open Crawl Space Vents

The most straightforward method to tackle open crawl space vents is through crawl space encapsulation. Make sure to work with a professional on this, as it requires specialized tools and training. AFS’s step-by-step crawl space encapsulation process looks like this:

Crewman placing insulation over an open crawl space vent to seal it.

Seal off crawl space vents and replace access doors to prevent external air and water entry.
Install an interior drainage system and a sump pump to collect and expel water.
Lay drainage matting on the floor to guide water towards the drainage system.
Attach thermal insulation panels to the walls to regulate internal temperatures.

Encapsulate the floor and walls with a vapor barrier.
Install a dehumidifier to control humidity levels.
Place IntelliJack™ crawl space support posts for even more protection.
Offer regular maintenance checks to ensure continued protection.

By choosing AFS, you select a solution tailored to your needs, supported by our proprietary products, designed for superior performance and durability.

Why Address Open Crawl Space Vents Now

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

Preventing Structural Damage: Early intervention can save on expensive repairs.
Enhancing Indoor Air Quality: A sealed, dry crawl space contributes to a healthier living environment.
Improving Energy Efficiency: Proper insulation and sealing can lead to significant energy bill reductions.
Avoiding Pest Infestations: Pests are less attracted to a dry crawl space.
Boosting Property Value: Homes with resolved crawl space issues are more appealing to buyers.

AFS’s specialized solutions combine expertise with high-quality products for industry-leading results.

Contact AFS for Dependable Crawl Space Solutions

AFS crewman inspecting a crawl space opening.

If your home has open crawl space vents, don’t delay in addressing the issue. AFS offers the necessary products, diagnostics, and expertise to fully encapsulate your crawl space.

Our unique products and comprehensive approach distinguish us from standard encapsulation options. Reach out to us today to schedule a free crawl space inspection and receive a no-obligation repair estimate.

Resources

3 Issues Caused by Crawl Space Vents

Venting your crawl space is a thing of the past. Nowadays, by keeping crawl space vents open, you can put your home and your family in danger.

6 Ways to Stop Crawl Space Moisture

Your wet crawl space is frustrating. Where do you even start? Here's the best way to stop crawl space moisture—straight from the experts.

How To Get Rid Of Musty Smells In Your Crawl Space

Most homeowners won’t go down to their crawl space the entire time they own their home, as it is seen to be a useless space. As it is usually damp and dark, and often home to unwelcome pests, many homeowners won’t check in on it until something becomes wrong. One of the telltale signs that you’re dealing with problems in your crawl space is musty or foul […]

Ted Dryce

Content Writer

Ted is an SEO Content Writer who has been with Groundworks since 2021. He’s covered home repair topics ranging from crawl space encapsulation to regional soil conditions. When he’s not working, Ted is performing improv comedy and working on his own creative projects.