The Fifth Fuel

About

The Fifth Fuel brings over 30 years of home performance expertise to Northern Virginia, Metro Maryland, and DC. This locally owned contractor specializes in energy efficiency upgrades designed to lower heating and cooling costs while improving comfort and indoor air quality. The company's approach begins with professional energy audits that use building science to identify where homes lose energy and money. Using blower door testing and infrared cameras, their team pinpoints inefficiencies with precision, then recommends tailored solutions. Services include air sealing, insulation installation and removal, spray foam applications, and crawl space encapsulation. For older homes that weren't built to modern performance standards, The Fifth Fuel offers retrofits to address heat loss, moisture intrusion, and other comfort issues affecting both historic and contemporary properties. Beyond the work itself, the team helps homeowners navigate available tax credits and rebates to make upgrades more affordable. Their insulation work extends year-round benefits—preventing heat transfer in winter while keeping cooling costs down in summer. The company also serves commercial buildings seeking efficiency improvements. Customers rate The Fifth Fuel 4.9 out of 5 stars across 308 reviews. The business can be reached at 703-368-1479 to schedule an energy assessment or discuss which combination of services makes sense for a specific home or building.

Services