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Crawl Space Insulation

Homeowners often face challenges like cold floors, drafts, and high energy bills in the mid-Atlantic region, but many are unaware these are typically signs of crawl space moisture problems. These issues can escalate quickly if not addressed promptly. 

Crawl space insulation is crucial for a comfortable and healthy living environment. Without it, your home is at risk of moisture-related problems, mold growth, and pest infestations. Insulating your crawl space is a preventative measure that enhances your home’s energy efficiency. 

JES Foundation Repair offers a dependable solution with our AquaStop™ ExTremeBloc™ Crawl Space Insulation. As experts in home health in Virginia, Washington, DC, Maryland, Northeast NC, and West Virginia, we specialize in crawl space encapsulation that tackles existing issues and averts future complications. 

This page showcases how our expertise can improve your home’s comfort and durability. 

What is Crawl Space Insulation? 

Crawl space insulation involves applying foam materials beneath your home to insulate the area. 

This component is essential for overall home energy efficiency and indoor air quality. Insulating the crawl space adds a barrier against heat loss and creates a moisture-resistant environment, reducing mold and deterring pests. 

Effective crawl space insulation, like ExTremeBloc™, is designed to endure the moist conditions often present under homes. 

When combined with crawl space encapsulation—sealing the space from external air and the earth—your home benefits from stabilized humidity, lower energy costs, and enhanced air quality. 

At JES Foundation Repair, we view crawl space repair as integral to home health, contributing to a more comfortable living space and safeguarding your home’s structural integrity. 

Signs You Need Crawl Space Insulation 

Watch for these indicators of crawl space insulation needs to prevent costly damages: 

These signs of moisture issues, if overlooked, can lead to significant problems. It’s crucial to arrange a free inspection with crawl space professionals when you notice any of these symptoms. 

Is Crawl Space Insulation Necessary? 

Insulating your crawl space is vital for protecting your home. 

Neglecting insulation issues allows moisture and humidity to increase, promoting mold growth that can exacerbate respiratory issues. Pests and rodents might also enter your home through gaps in damaged insulation. 

JES Foundation Repair emphasizes early action as part of our whole-home solution, ensuring your home’s structural longevity and the health of its inhabitants. 

DIY attempts at inspecting or insulating crawl spaces are not recommended. These areas can be dangerous, and off-the-shelf solutions often fail to address the core problems. Trust JES Foundation Repair professionals for accurate assessment, repair, and protection of your crawl space. 

What Are the Different Kinds of Crawl Space Insulation? 

Various insulation types are suitable for crawl spaces, including the following: 

Fiberglass Insulation 

While common in homes nationwide, fiberglass is not ideal for crawl spaces. 

Typically placed between floor joists, this material is prone to moisture, mold, and pests over time. 

Spray Foam Insulation 

Often applied to surfaces like walls and joists, spray foam isn’t the best choice for crawl spaces. 

Closed-cell types are more durable but can still succumb to mold, chemical odors, and termite damage in damp areas. 

Foam Board Insulation 

Opt for thermal foam board insulation like ExTremeBloc™ for effective crawl space insulation. These panels, cut to fit, are installed on interior walls. 

ExTremeBloc™ features reflective surfaces for heat retention and excellent insulation value, despite being thinner than alternatives like fiberglass. 

What Are the Benefits of Crawl Space Insulation? 

Proper crawl space insulation offers several advantages, including: 

  • Moisture Control: It prevents ground moisture from entering your home, reducing mold, pests, and related issues. 
  • Enhanced Energy Efficiency and Cost Savings: Adequate insulation reduces the workload on heating and cooling systems, leading to energy conservation and lower bills. 
  • Improved Indoor Comfort: Insulation panels help maintain comfortable floor temperatures year-round and contribute to better air quality. 

Pairing our unique solutions and expert services is essential for optimal outcomes. Our products, developed with cutting-edge technology and top-quality materials, surpass standard options, providing exceptional benefits to your home. 

How We Install Crawl Space Insulation 

Our comprehensive crawl space encapsulation includes several vital components, including insulation. Our installation process involves: 

Trust JES Foundation Repair for an efficient and thorough installation process, from start to finish. 

Why Our Crawl Space Insulation is the Best Choice for Your Home

JES Foundation Repair’s ExTremeBloc™ foam board insulation excels due to: 

  • Lightweight, durable panels 
  • Eco-friendly materials 
  • Class A fire rating 
  • Graphite-infused, expanded polystyrene core 
  • Radiant heat barrier coating 
  • Integrated termiticide and pest deterrent 
  • High R-value for exceptional thermal resistance 
  • Moisture resistance 
  • Installation includes a gap for pest control inspections 

Contact JES Foundation Repair for Crawl Space Insulation Today! 

At JES Foundation Repair, we understand the significance of a well-insulated crawl space. Our team, serving various regions including Virginia, Washington, DC, Maryland, Northeast NC, and West Virginia, is equipped with the expertise and experience to install crawl space insulation efficiently and effectively. 

We offer a range of solutions to suit your needs and budget, backed by a quality guarantee. JES Foundation Repair provides complimentary inspections and estimates, allowing you to choose the best approach for your home. 


The R-value measures thermal resistance in materials like insulation. Higher values indicate better heat retention. Learn more about our reliable insulation and its R-value by contacting us to schedule a free inspection.

While many insulation types last 15-20 years, they can degrade due to moisture if not properly sealed. Our ExTremeBloc™ foam board insulation is designed as a permanent solution. Contact us for more information and to arrange a free inspection.

Costs vary based on crawl space condition, size, and required solutions. Our experts provide a no-obligation estimate after a free inspection, detailing costs and financing options.

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JES Foundation Repair service area map of the Mid-Atlantic region.

Our Locations


8361 Town Center Ct
Nottingham, MD 21236


311 Central Rd.
Suite 2-02
Fredericksburg, VA 22401

Hampton Roads & NE NC

2569 Quality Ct
Virginia Beach, VA 23454

Northern VA & DC

7940 Gainsford Ct.
Bristow, VA 20136


309 Quarles Rd
Ashland, VA 23005

Southwest Virginia / Roanoke

2033 Cook Dr.
Salem, VA 24153

Western Virginia

456 Old Courthouse Rd
Appomattox, VA 24522


45 W Boscawen St,
Winchester, VA 22601