Crawl Space Sealing and Vapor Barriers

Your crawl space may be hidden away, but it plays a big role in the air you breathe inside your home. Unsealed crawl spaces allow radon gas, damp air, and even odors to move upward into your living space. At BreatheWell Radon Solutions, we provide professional crawl space sealing and vapor barrier installation to give your home a healthier foundation.


Why Sealing the Crawl Space Is Important


Crawl spaces that are left open or poorly protected can create a chain of problems, including:


  • Radon entry from the soil below the house.

  • Moisture buildup that leads to mold, mildew, and wood damage.

  • Air leaks that make heating and cooling less efficient.

Because radon is invisible and odorless, you may not realize your crawl space is the main pathway for this dangerous gas. Sealing it helps block radon and also reduces the risk of moisture problems.

What a Vapor Barrier Does


A vapor barrier is a heavy plastic liner placed along the crawl space floor and, in many cases, up the walls. It’s like putting a raincoat under your home—it keeps ground moisture and gases from escaping upward.


With a properly installed vapor barrier, you’ll notice benefits such as:


  • A drier, more stable crawl space environment.

  • Less musty smell drifting into the house.

  • Better energy savings from reduced drafts.

  • A healthier overall living space for your family.

How We Do It


BreatheWell’s team uses proven methods and durable materials to deliver long-lasting results.


Our process includes:


  • Initial Assessment – We inspect the crawl space for radon entry points, moisture issues, and layout.

  • Site Prep – Removing loose debris and preparing the surface for sealing.

  • Sealing Work – Applying professional sealants to cracks, gaps, and openings.


  • Vapor Barrier Installation – Installing a thick liner, sealing all seams tightly for a continuous shield.

  • System Connection – If your home needs radon reduction, we connect the crawl space sealing to your radon system for full protection.

Why Homeowners Choose BreatheWell



  • Radon Specialists – We focus exclusively on radon mitigation and know how crawl spaces affect air quality.

  • Health-First Solutions – Every step is designed to make your indoor air cleaner and safer.

  • Durable Results – We use heavy-duty barriers and proven installation techniques for long-term performance.

Create a Healthier Home


Sealing your crawl space and installing a vapor barrier is a smart step toward protecting your home against radon, moisture, and mold. It’s an investment in your family’s comfort and safety.


Call today to set up your radon mitigation consultation.

Contact Us

Crawl Space Sealing & Vapor Barriers FAQ

  • Why should I seal my crawl space?

    Sealing keeps radon, damp air, and odors from moving into your home. It also helps preserve the structure of your house.

  • Is a vapor barrier the same as a moisture barrier?

     Yes. A vapor barrier is a thick plastic liner that prevents ground moisture and soil gases from entering your crawl space.

  • Can this help lower energy bills?

     Yes. Sealing the crawl space reduces drafts and improves efficiency, which often lowers heating and cooling costs.

  • Does a vapor barrier stop mold?

    While it doesn’t kill mold, it lowers humidity so that mold and mildew are far less likely to grow.

  • How long will the barrier last?

    High-quality vapor barriers, when installed professionally, are designed to hold up for many years without breaking down.