Learn how you can take advantage of Dominion Energy incentives, IRA rebates, and Virginia Energy programs!

Service Areas

The Fifth Fuel is a family owned and operated business with over 30 years of experience providing energy-saving services to the Metro-Maryland, DC, and Northern Virginia areas. Headquartered in Manassas, VA, our team specializes in finding reliable and long-lasting solutions based on building science, not guesswork. Our comprehensive insulation and air sealing services can help make healthy homes that are more comfortable and affordable to heat and cool. 

Contractors for Energy Efficiency 

At The Fifth Fuel, energy efficiency is our main goal. We work with both new construction and retrofit upgrades to boost energy performance with our insulation and air sealing solutions. If you don’t see your Northern Virginia or Metro-DC city or town listed below, reach out to our team to find out if we can help you.

Northern Virginia 

  • Alexandria
  • Arlington 
  • Falls Church
  • McLean
  • Fairfax
  • Springfield
  • Mt. Vernon
  • Reston
  • Herndon
  • Vienna
  • Chantilly 

Metro DC & Maryland

  • College Park
  • Bethesda 
  • Rockville
  • Silver Spring
  • Chevy Chase

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The Fifth Fuel Insulation & Air Sealing Services

We believe that energy efficient homes are the most cost-effective and sustainable way to combat climate change, the rising cost of utilities, and more. We also stay up-to-date on what rebates and incentives are available throughout our service area to help our customers maximize their savings on fundamental home upgrades.


It’s not uncommon for homes in the capital region to lack adequate insulation, which can lead to drafty rooms, moisture issues, and high energy bills. We only use high-quality insulation materials, such as spray foam and cellulose insulation, and offer several solutions to help your home, including:

Air Sealing

By sealing up the gaps and cracks found throughout your home that allow for unwanted airflow, air sealing helps to improve your building structure, improve indoor air quality, and prevent moisture intrusion. We always recommend air sealing when making insulation upgrades because the two services work together to protect your home from the elements and enhance the benefits of each other. 

Energy Audits

The best way to find out where your home has inefficiencies is with a thorough inspection from a professional team, like The Fifth Fuel. This in-depth look into your home’s performance allows our team to create a customized plan of action to solve issues in your home. We use specially designed tools, like infrared cameras, blower door testing to accurately pinpoint areas of air leakage, poor insulation, and more. We’re also an ENERGY STAR partner and can help new homes get certified with their energy efficiency programs.

Commercial & Multi-Family Projects

We provide our same energy audit, insulation, and air sealing services for commercial and multi-family projects too! If you’re looking to lower your operating costs or improve the comfort of your tenants, you can rest assured that our team will find the best solution for your specific needs. 

Get started on the right side of energy efficiency with The Fifth Fuel. Call 703-368-1479 or contact us for a free estimate today. 

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High-Performance Insulation Services in Washington DC

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