Crawl Space Insulation Replacement and Installation

A drafty home and rising energy bills are more than just everyday annoyances—they’re issues you don’t have to tolerate. These issues typically indicate excessive moisture, with inadequate crawl space insulation being the primary culprit.

Insulation for crawl space areas is crucial for a comfortable and healthy indoor environment. Without it, your home risks mold growth and structural damage.

As home health experts in Virginia, Washington, D.C., Maryland, North Carolina, and West Virginia, our crawl space encapsulation solutions resolve and prevent problems, including wet crawl space insulation.

This page outlines what you need to know about crawl space insulation and how JES Foundation Repair can help.

Crawl space insulation is a barrier material installed beneath your home to regulate indoor flooring temperatures and reduce moisture. Adequate insulation for crawl spaces provides a barrier against heat loss, reduces moisture and mold growth, and provides many other benefits.

We considered these factors when developing ExTremeBloc. Designed to endure wet crawl space insulation conditions, these panels perform optimally when combined with our comprehensive encapsulation solutions. These systems seal the crawl space and provide a healthier home environment by effectively insulating a crawl space.

Homeowner Checklist

• Cold floors in winter 
• Musty smells 
• High indoor humidity levels 
• Sagging or bouncy floors 

Professional Checklist

• Water in the crawl space
• Wet crawl space insulation
• Crawl space mold 
• Pests in the crawl space 
• Rotting wooden supports 

• Fiberglass: Common in homes nationwide, fiberglass is not ideal for crawl spaces. Typically installed between floor joists, this soft material is vulnerable to moisture, mold, and pests.
• Spray Foam: Often applied to walls and joists, spray foam isn’t the best choice for crawl spaces. While closed-cell types are durable, they can still be affected by mold, chemical odors, and termite damage in damp areas.
• Foam Board: Thermal foam board insulation, like ExTremeBloc, is ideal for crawl spaces. Custom-fit panels are installed on interior walls with reflective surfaces to retain heat. Although thinner than fiberglass, ExTremeBloc provides superior insulation value.

• Moisture control
• Mold prevention
• Fewer pest infestations
• Long-term energy savings
• Consistent indoor floor temperatures
• Enhanced indoor air quality

• We complete a thorough crawl space inspection to identify issues.   
• Seal open vents and replace access doors as needed.  
• Install crawl space drainage, drainage matting, and a sump pump.
• Affix insulation panels to the walls and leave a gap for pest inspections.  
• Encapsulate the crawl space with a vapor barrier.  
• Install a crawl space dehumidifier.  
• Schedule annual maintenance inspections to ensure optimal performance. 

• Lightweight, durable panels 
• Eco-friendly materials 
• Class A fire rating 
• Graphite-infused, expanded polystyrene core

• High R-value for exceptional thermal resistance 
• Radiant heat barrier coating 
• Integrated termiticide and pest deterrent 
• Installation includes maintenance gaps for inspections

At JES Foundation Repair, we understand crawl spaces. Our experienced team has over 30 years of expertise in improving homes throughout Virginia, Washington, D.C., Maryland, Northeast NC, and West Virginia.

You can count on our skilled team to address crawl space insulation and repair requirements effectively and efficiently. When you partner with JES, you benefit from quality solutions tailored to your repair needs and budget. Make the best decision for your home by contacting JES today for a free crawl space inspection and repair estimate.