The Importance of Closing Crawl Space Vents
Many Indiana homes, especially older ones, were built with crawl spaces with open vents in the foundation walls. These vents were once thought to improve air circulation and reduce humidity, but modern building science shows the opposite is true. Instead of helping, open vents allow humid air, rain, and outdoor temperatures to enter the crawl space, creating moisture problems that can damage wood framing, insulation, and even your home’s foundation.
Blocking crawl space vents is one of the most effective ways to protect your home from these issues. On this page, we’ll explain how vent sealing works, why it’s recommended for Indiana’s humid climate, and how it contributes to a cleaner, drier, and healthier home environment.
Sealed vs. Open Crawl Space Vents
Let’s compare the differences between sealing crawl space vents and keeping them open. You’ll see how closing them up ultimately benefits your home in the long run.
Why Crawl Space Vents Are a Problem
Many homeowners wonder how to air out crawl space areas. The truth is that having vents in your crawl space isn’t a good idea. These vents allow moist air to enter, especially in spring and summer, which can cause several problems that are difficult to rectify. Some of these issues include:
Also, because of how air moves up through your house, the bad air from your crawl space ends up in the rest of your home. So, the problems in your crawl space can affect your whole house.
Benefits of a Sealed Crawl Space
Fixing your crawl space vents and covering up the area can stop these problems. By keeping the outside air out, you get several benefits:
- Save Energy: With vents open, your heating and cooling system has to work harder, which costs more money. Sealing the vents helps keep your home’s temperature steady and can save you money on energy bills.
- Stop Pipes from Freezing: In winter, pipes in the crawl space can freeze and burst, causing leaks. Sealing the vents and adding insulation can prevent this.
- Better Air Quality: Almost half of the air you breathe at home comes from the crawl space. By sealing the vents, you stop moist, dirty air from coming in, which makes the air in your home cleaner.
- Keep Pests Out: Pests like damp places, and open vents are like a welcome sign for them. Sealing the crawl space makes it less inviting for pests, helping keep them out.
In short, sealing your crawl space vents can stop a lot of problems and make your home more comfortable and safe.
Why Do Crawl Spaces Even Have Vents?
Indiana has a rich history of homes. However, no matter the building style, crawl space foundations have traditionally been constructed with open vents. Until roughly the 1990s, most homes with a crawl space were built this way.
Adding vents was once believed to help with crawl space ventilation and reduce moisture issues within these areas. However, it turns out the opposite is true. Foundation specialists have found that open vents in fact worsen problems with excessive humidity, mold growth, structural damage, and other issues.
How Professionals Seal Crawl Space Vents
Your crawl space is both delicate and dangerous, so it’s not a good idea to venture into this area under your home to inspect it or fix it with DIY solutions. It’s best to leave the heavy lifting to crawl space repair experts with the right tools, training, and protective gear.
Here are the steps crawl space professionals will take to not only seal your crawl space vents but also encapsulate the crawl space to create a safer and healthier home environment.
Debris Removal
Ridding your crawl space of any failing insulation, liners, and other debris helps create a clean slate for the installation crew. This also aids in improving air quality and cuts out attractive items for pests.
Water Removal and Waterproofing
If leaking water is a problem in your crawl space, the pros will pump the water out to dry the space first. Next, they’ll install waterproofing measures like interior drainage and a sump pump to collect excess moisture and actively remove any water that seeps inside the crawl space.
Block Off Vents
Then, the actual sealing of the vents happens. Some pros, like Indiana Foundation Service, use special materials to block off the vents from inside the crawl space.
Our team uses our thermal insulation panels, cutting them to size so blocks of this thick, waterproof material fit perfectly into the vent space. Additionally, airtight vent covers can be placed on your home’s exterior upon your request.
Insulate Crawl Space Walls
The rigid crawl space insulation material used for internally sealing the vents is also placed on the crawl space walls. These R-11 panels are ideal compared to soft fiberglass insulation. They are also integrated with termiticide and are installed with a gap large enough to allow for pest control inspections.
Encapsulate with a Vapor Barrier
To fully seal the crawl space and isolate it from the earth, crews then encapsulate the crawl space with a 20-mil-thick vapor barrier. This vapor barrier is similar to a swimming pool liner, and it is placed on the crawl space walls and floor.
Add a Crawl Space Dehumidifier
The final piece of the puzzle is adding a dehumidifier in the crawl space. Typical units from big-box stores are not built to withstand crawl space humidity, but professional dehumidifiers perfectly fit the bill.
The pros will install a self-draining unit that is also energy-efficient. This fully functional air system not only controls crawl space humidity but also cleans and filters the air, eliminates condensation, helps curb odors, and reduces the potential for mold growth.
Local Pros Can Help Seal Your Crawl Space and Vents
Warm, moist air coming in through open crawl space vents can hurt your home’s health and safety. A sealed crawl space, including blocking crawl space vents, is a valuable way to protect your home and loved ones.
Our team at Indiana Foundation Service is experienced in addressing the issues caused by humid crawl spaces and open vents, offering customized solutions. Contact us today for a free inspection to evaluate your crawl space’s condition and get it to a healthier place.
Crawl Space Vent FAQs
The repair duration depends on the crawl space condition and the chosen solutions. However, our team can typically complete the project within a few days. Indiana Foundation Service works efficiently to minimize disruption. Get a no-obligation estimate and project timeline during a free inspection.
Costs vary based on crawl space size, condition, and specific repairs required. However, investing in professional solutions with Indiana Foundation Service ensures value for money and long-lasting results. We offer free inspections, transparent pricing, and various financing options. Contact us to learn more.
Homeowner’s insurance typically does not cover crawl space repair or encapsulation as they are considered preventative maintenance measures rather than sudden or accidental events. However, some policies cover damages caused by a crawl space issue, such as mold or water damage, if it is deemed to be a result of a covered peril like a burst pipe. It’s always best to review your policy or speak with your insurance provider to confirm what specific coverage is included for crawl space repairs.
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