Attic Insulation

Trusted Attic Insulation Company Near Reston, Sterling, Ashburn

We are Virginia's experts for installing attic insulation

Attic Insulation installed in Reston

Affordable upgrade. Cellulose insulation is often used in attics because it can be installed quickly and effectively with blowing equipment. Cellullose is super-green: It’s made from recycled newspapers and treated for resistance to fire, mold and insects.

Upgrading attic insulation is a VERY popular energy-saving improvement because more energy (and money!) is lost through the attic than through any other part of the house.

What makes matters worse is improperly or poorly installing inadequate attic insulation. Existing attic insulation in many homes may be as minimal as R-19-- which pales in comparison to the recommended R-value!

Going through a cold winter with so little insulation is like wearing a t-shirt in a snowstorm. What your house really needs is the equivalent of a thick down-filled parka.

The U.S. Department of Energy recommends between R-49 and R-60 of attic insulation in Sterling, Leesburg, Ashburn, Fairfax, and other areas. That's at least a 16-in.-thick blanket of fiberglass insulation!

Before and After
  • Mold Treatment- Leesburg, VA
    Mold Treatment- Leesburg, VA

    This Leesburg, VA homeowner had mold growing in their vented attic assembly that was causing the family to develop allergies and get sick very often.  Comfenergy discovered this attic mold and treated it with MoldX-2 before air sealing, insulating and providing other services.

    These pictures ar eof the mold covered roof joists before and after being treated by Comfenergy with MoldX-2.

  • Decreased cold drafts for homeowner in Herndon, VA
    Decreased cold drafts for homeowner in Herndon, VA

    This home in Herndon, VA was experiencing cold drafts this winter and found it expensive to keep their home warm.  In the attic there was very little insulation and had a low R value.  We used our TruSoft Blown-in Insulation resulting in a less drafty and more comfortable home.

  • Arlington, VA Spray Foam Attic Encapsulation
    Arlington, VA Spray Foam Attic Encapsulation

    This home was looking to make the top floor more comfortable AND lower their utiltiy bills....all with one solution!!!

  • Superior R-Value in Garrisonville, VA
    Superior R-Value in Garrisonville, VA

    These before and after photos are measuring the R-value of the insulation in the attic of this Garrisonville, VA home. 

    R-value measures how well building insulation can prevent the flow of heat into and out of the home. Higher R-value means greater insulation performance, and thus more savings on your next heating and cooling bill. 

    In the before photo you can see how low the R-value was. Comfenergy installed TruSoft Cellulose insulation in this attic to an R-value of 60! Now this house is more energy efficient and costs less to own. 



  • Attic Insulation in Mclean, Va
    Attic Insulation in Mclean, Va

    This customer in Mclean, VA called us as they wanted to add more insulation in the attic.  We did air sealing to stop the air leakage, as well as built plywood dams to keep the insulation in place and off the newly built storage deck.  New decking was installed for storage and air sealed at the seams.  Insulation was upgraded to R60. The result of doing this is better insulation & air sealing keeping the house warmer in the winter and cooler in the summer. 

Customer Reviews

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Contact us today to schedule your home energy audit to identify where your home is in need of more insulation. Our audit also diagnoses the other energy issues in your home-- which may be the larger factors in your home's high utility bills and discomfort.

We offer Free Estimates for attic insulation in Ashburn, Reston, Sterling, Great Falls, Vienna, Herndon, Purcellville, Fredericksburg, Middleburg, and the neighboring locations including Stafford. We also offer a unique system called the SuperAttic™ System, which adds a continuous & airtight layer of foam insulation beneath the attic rafters and inside the attic's gable walls.

Insulating your attic to recommended levels can cut heating and cooling costs by 20% or more.

If inadequate attic insulation is costing you money,
Comfenergy can help.

Contact Us For An Insulation Estimate Today

Importance of Air Sealing and Insulating Attics

Larry Janesky explains that insulation is also needed in warmer areas. Insulation prevents heat transfer. It prevents hot air from being transferred to the outside in the wintertime, and prevents the attic's scorching heat from being transferred into the living areas of your home during the summer.

Air Sealing Goes Alongside Attic Insulation

New Attic Insulation installed in Fairfax Station


Baffles keep ventilation channels open. Plastic spacers are installed between rafters in the attic to maintain a vent space beneath the roof surface after new insulation is installed.

Air sealing is a critical step when insulating an attic because sealing air leaks stops conditioned interior air from leaking into the attic. Comfenergy uses a variety of materials and techniques to stop this energy-wasting air leakage.

Installing baffles ensures proper attic ventilation. Sized to fit between the rafters in the attic, plastic baffles maintain a ventilation space between the attic's soffit vents (located along the eaves) and the ridge vent. Installing baffles before adding more attic insulation helps avoid damage from ice damming and excess moisture.

Old insulation can be reused, most of the time. As long as the existing insulation is not wet, moldy or overly compressed, it can usually be put back into place after the attic has been air-sealed and before new insulation is installed.

Start Saving Energy and Money With An Attic Insulation Upgrade.

Call 1-855-764-5297 or contact us online to schedule a home energy audit or an estimate for home insulation in Reston, Sterling, Ashburn, and in and around Herndon, Great Falls, Middleburg, Purcellville, Fredericksburg, Vienna, Manassas, and Stafford.

Be sure to check out our specialized SuperAttic™ System for continuous & airtight coverage.