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How the Stack Effect can Affect your FL or GA Home

Heat rises. The same thing happens in your crawl space. Warmer air will rise into the living areas of your house and may cause poor air quality.

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What is the Stack Effect?

The stack effect is simple – warm air rises in a building. This occurs because of the different temperatures between indoors and outdoors air. The stack effect is most pronounced in the winter when indoor and outdoor temperatures are at their greatest difference.

Warm air inside the crawl space is sucked up throughout the home, eventually escaping through the upper levels of a building – through open windows, ventilation, or roof. When this happens, cold, outside air is sucked in at the lowest level, the crawl space, and the process is repeated.

How Does it Affect My Home?

When outside air enters the crawl space, it’s either going to be cooler or warmer than the crawl space air, depending on the weather. If the outside air is cooler, it will remain in the crawl space for a while. When it warms up over time, it will rise through the floor into your living area and exit through the attic. If the outside air is warmer than your crawl space upon entry, it will immediately start to rise through the floor and upward through your home.

When the hot air rises, it can bring many particles into your home. These include mold spores, microscopic waste from pests, dust mites, or dirty air. As a matter of fact, more than 50 percent of the air you breathe comes from your crawl space, so if your crawl space is experiencing moisture issues, the stack effect can exasperate and spread these issues to your living space.

Long-Lasting Effects of the Stack Effect

Since the stack effect brings crawl space problems into your home, it can cause a few issues over time. These include:

  • High Energy Bills
  • Mold
  • Allergic Reactions or Breathing Problems

If you or others in your home have been experiencing any of these issues, your home is likely experiencing the stack effect. Humid, poor-quality air is traveling through your house. Meanwhile, your crawl space is being affected by moisture issues as the Florida humidity causes wood rot, mold, or pest infestations.

You can’t eliminate the stack effect, but you can control the air quality in your crawl space by contacting our expert team for solutions. With our repair methods, you can ensure the air in your home is free of mold or other allergens. Plus, you can ensure clean air with a crawl space dehumidifier.

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    Reduce the Effects of the Stack Effect

    When it comes to reducing the stack effect, there’s only one thing that will cut the stack effect off at the source. You need to encapsulate your crawl space. After all, if air can’t enter the crawl space, you can’t have the stack effect in the first place. Below is the process a crawl space expert will use to encapsulate the crawl space.

    Remove Standing Water and Fix Leaks

    Groundwater leaks are the most common reason you might have standing water in your crawl space, but they’re far from the only reason. You might have standing water in the crawl space due to condensation from humid air inside or plumbing leaks.

    Whatever the reason, removing standing water should be the first thing you do in your crawl space to avoid this exact problem.

    Close Crawl Space Vents and Doors

    Typically, adding crawl space vent covers to any open vents around your crawl space can greatly reduce the stack effect. This is a rather complicated process, and it’s important to hire a crawl space expert to get the job done properly. If there’s nowhere for the air to enter the crawl space, you won’t have to deal with the stack effect.

    Install a Vapor Barrier

    A vapor barrier does what it sounds like: blocks water vapor from entering your crawl space. When you have a dirt crawl space, water vapor is going to rise through it even if the top layer of the dirt seems dry.

    When it rains, groundwater can seep into the dirt below your crawl space and eventually evaporate. This causes many problems in your crawl space that will only spread due to the stack effect. A high-quality vapor barrier stops this from happening.

    Add a Crawl Space Dehumidifier

    Instead of just allowing the crawl space to fill with high moisture levels, you will want to install a crawl space dehumidifier.

    A dehumidifier allows you to keep the crawl space at a certain healthy relative humidity. Although this isn’t necessary for everyone, in areas like Florida and Georgia, it’s useful to maximize your crawl space health and stop the stack effect.

    Solve the Stack Effect with Professional Crawl Space Repair

    Your crawl space is extremely important in controlling the air quality of your home. Don’t let the stack effect cause issues to your health and home safety. Contact Alpha Foundations for a free crawl space inspection.

    As the most trusted foundation repair experts in Florida and South Georgia, we will come up with solutions for your individual crawl space situation. Contact us today.


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