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By Steve Mcleod November 16, 2023

The Benefits of a Sealed Crawlspace: Homeowners, Take Note!

If you’re a homeowner in Durham or Garner, you’re likely familiar with the unique challenges that the local high humidity climate can present. The hot and humid summers, combined with occasional heavy rainfall, can lead to a variety of issues, including moisture problems in your crawlspace. That’s where the concept of a sealed crawlspace comes into play, offering numerous advantages to homeowners in humid climates.  We are indoor air quality (IAQ) experts and specialize in sealed crawlspace in Durham and Garner. We can help you understand the benefits and potential problems associated with encapsulated crawlspaces.  Let us elaborate!

Understanding Sealed Crawlspaces

Before diving into the benefits of sealed crawlspaces in Durham and Garner, let’s first clarify what they are. A sealed crawlspace, also known as an encapsulated crawlspace, is a space beneath your home that is completely sealed off from the outside. This involves the installation of a insulation vapor barrier on the floor and walls, sealing all openings, and often adding a dehumidification system. The goal is to control moisture, prevent condensation and mold growth by creating a low maintenance, energy-efficient controlled environment for storage of personal items and protection for the electrical, and HVAC equipment within your crawlspace.

Moisture Control

The primary reason homeowners opt for a sealed crawlspace in Garner and Durham is moisture control.  With open crawlspace foundation vents in the humid climate you get excess moisture in your crawlspace, which can result in a host of problems, including mold growth, wood rot, and structural damage. A sealed crawlspace effectively eliminates these issues by preventing moisture from entering, maintaining a cool clean and dry healthy environment.

Mold Control

Mold loves to grow in cool dark and damp places with access to wood, cardboard and paper.  Mold may produce toxins, disease, or simply be allergenic.  The best way to prevent mold growth is to control moisture and temperature.  A properly sealed crawlspace has moisture and temperature control.  This is critical for your family’s health because even in open vent in crawlspaces.  Warm air rises and mold pollutants may enter the living area through the air ducts or plumbing and electrical holes in the floor.

Improved Indoor Air Quality

Moisture in your crawlspace doesn’t just stay there—it can infiltrate your home’s interior, leading to poor indoor air quality. Mold spores, allergens and insects can enter your living spaces, through improperly sealed holes for plumbing, HVAC and electrical, potentially causing respiratory issues, difficulty sleeping, and fatigue.  A properly sealed crawlspace creates a healthy environment, eliminating contaminants from entering your home and ensuring better air quality for your family.

Energy Efficiency

Sealed crawlspaces offer energy efficiency benefits by helping to regulate the temperature in your home. By preventing outside air from infiltrating your crawlspace, your HVAC system doesn’t have to work as hard to maintain a comfortable indoor temperature and humidity. This can result in lower energy bills and a more eco-friendly home.

Enhanced Structural Integrity

Excess moisture in your crawlspace can lead to wood rot, which can compromise the structural integrity of your home. By maintaining a dry environment, a sealed crawlspace protects the structural components of your house, including floor joists and subflooring, from decay and damage, ensuring your home’s long-term stability.

Pest Prevention

Crawlspaces are often susceptible to pests like rodents and insects. A sealed crawlspace acts as a barrier against these unwanted intruders, keeping your home pest-free. Additionally, it can help deter termites, which are known to thrive in moist environments.  Many insects thrive in crawlspaces because they can live on crawlspace moisture, and mold.

Increased Home Value

Investing in a sealed crawlspace in Garner and Durham can increase the value of your home. Potential buyers are often attracted to properties with sealed crawlspaces because they offer peace of mind regarding moisture-related issues and the overall condition of the home.

Long-Term Savings

While the initial cost of sealing a crawlspace may seem like an investment, the long-term savings can be substantial.  If you have an open vented crawlspace you likely have moisture and mold issues that are entering your home and likely affecting your health.  Living without mold illness is priceless.You’ll spend less on energy bills, maintenance, potential repairs associated with moisture damage, and have better health. Over time, the benefits of a sealed crawlspace far outweigh the initial investment.

Concluding opinions

For homeowners, a sealed crawlspace in Durham and Garner is more than just a practical solution—it’s an investment in the long-term health and integrity of your home and family. Don’t let the challenging climate of these areas dictate the condition of your home; take control by considering a sealed crawlspace from a leading and experienced professional like Indoor Environmental Systems for a more comfortable, healthy, and cost-effective living environment. We have been in this business for 30 years now and you can trust us.

Quiz: Is a Sealed Crawlspace Right for You?

  1. Are you dealing with persistent moisture issues in your crawlspace?
    • A) Yes
    • B) No
    • C) Unsure
  2. Do you experience fluctuations in your energy bills?
    • A) Yes
    • B) No
    • C) Unsure
  3. Have you noticed signs of pests in your home?
    • A) Yes
    • B) No
    • C) Unsure

Score Yourself:

  • Mostly A’s: You should definitely consider a sealed crawlspace.
  • Mostly B’s: You might not need it, but it could offer added benefits.
  • Mostly C’s: Consult professionals for an in-depth assessment.


For Durham and Garner homeowners, sealed crawlspaces are not merely practical solutions but long-term investments in your home’s health and structural integrity. Choose to work with Steve McLeod from Indoor Environmental Systems, is a seasoned professional for custom crawlspace encapsulations and healthy home services.

 1: Basics of Encapsulated Crawlspaces]

 2: Benefits of Moisture Management]

 3: Structural Preservation and Pest Control]

Indoor Environmental Systems, radiant barrier crawlspace; superior design, exceptional performance, and durability.

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