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Products & Services

Insulation Services
Spray Foam Insulation
Attic Insulation
Super Attic System
Blown-In Insulation

Types of Home Insulation

Basement Insulation
Crawl Space Insulation
Garage Insulation
Wall Insulation

Air Sealing Services
Blower Door Test

Additional Services
Ductwork Solutions
Home Energy Audit
Replacement Windows
Replacement Doors
Interior Window Inserts
Aspen Air Purifier

Before and After Pictures from Sterling
Utility Room air sealing-Sterling, VA

Utility Room air sealing-Sterling, VA

Before After
Utility Room air sealing-Sterling, VA Utility Room air sealing-Sterling, VA

This Sterling, VA homeowner had a utility room that backed up to their garage.  There was a lot of air leakage allowing cold air to travel through the utility room and into the basement making it cold in the winter. 

Thermax foam boards and one part foam was used to seal this air leakage off, and to keep it safe from flammability.  Thermax is a fire resistant material.

Cold Storage Area-Sterling, VA

Cold Storage Area-Sterling, VA

Before After
Cold Storage Area-Sterling, VA Cold Storage Area-Sterling, VA

This Sterling, VA homeowner had a nice storage area beneath the stairwell that is adjacent to their garage. The cold garage air made this room very cold int he winter.  Comfenergy used Thermax foam boards and two part foam to air seal it and make it warm to put to better use! 

Attic Access Installation in Sterling, VA

Attic Access Installation in Sterling, VA

Before After
Attic Access Installation in Sterling, VA Attic Access Installation in Sterling, VA

This Sterling, VA homeowner called us out to lower his energy bills, but we couldn't get into the attic because there was no access. We cut the drywall and created a new access with trim. 

Company Awards
Loudoun's Favorite Insulation Company 2019
The results are in from Loudoun Now's Annual Favorites Poll. Comfenergy is the winner for Favorite Insulation Company!... [Read more]
Best of Loudoun - 2019
We won the Best Insulation Company in Loudoun County again this year!!... [Read more]
2018 Superior Service Business of the Year
Comfenergy earned the 2018 Superior Service Business of the Year award from the Loudoun County Chamber of Commerce... [Read more]
More Awards

Respected Home Insulation & Energy Audit Contractor Serving Sterling

 I appreciate how prepared he was, how he took the time to listen to my concerns, and didn't try to...
Happy Customers Surrounding Sterling, VA
Work Requests

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Reviews From Sterling
Testimonials From Sterling
Wow! Comfenergy came to our house to conduct an energy assessment, and it far exceeded our expectations. With a special tool, Justin basically x-rayed our...
Testimonial by Tina N. from Sterling, VA
Ismael, Rafael, and Jordan did an outstanding job! I will ask for them again as our remodeling contunes.
Testimonial by John C. from Sterling, VA
Crew was very thorough, clean, friendly, accomodating, offered suggestions, and were happy to make changes.
Testimonial by Michelle P. from Sterling, VA

Home Insulation Experts Serving Sterling, VA

Comfenergy is Sterling's authorized dealer of the nationally renowned Dr. Energy Saver network of the best energy-conservation contractors across the country. We are not just a contractor company, we specialize in helping you understand your home's current energy efficiency, suggest repairs, and we also do the work! Not only do we offer a variety of home energy services, but we also offer replacement windows and door services to keep the outside out and warmth in, and to boost your curb appeal. You'll receive the maximum energy and cost-saving results with the least amount of hassle. Customer satisfaction is our goal, and we take whatever steps necessary to ensure that you are more than happy with our service. At Comfenergy our slogan is "We Fix Uncomfortable Homes!", and we guarantee we will do that. If your energy costs are too high, or there are areas of your home that are too cold in the winter or hot in the summer, contact us today!

Expert Spray Foam Insulation Company

At one point pink fiberglass insulation was the best option for home insulation. However, today spray foam insulation is the much better option. Spray foam insulation has several benefits and beats the traditional fiber-glass product in every way. Spray foam insulation is the top choice for homeowners, contractors, and building scientists (the experts who study home energy performance) for several reasons. Here are the top reasons spray foam insulation should be your number 1 choice:

Advantages of Spray Foam Insulation:

  • Provides both insulation and air sealing
  • Fills gaps and cracks
  • High R-value
  • Speedy installation
  • Spray foam won't shift, settle, or fall out of place

Sterling’s Trusted Window & Door Replacements

Comfenergy also offers window and door replacements for an even more beautiful and efficient Sterling home. We install Simonton interior window inserts, window replacements, and door replacements with expert precision. Replacement windows and doors will help to maintain more even temperatures and eliminate drafts and energy loss in your home. New windows and doors not only improve the interior and exterior appearance of your home, but they also can lead to significant energy savings. Call to schedule a free estimate today in Sterling, VA!

Help Your Home with Attic Insulation

Upgrading your home’s attic insulation is a very effective & popular energy-saving method because there is usually a lot of room for improvement. Most homeowners believe their attic has enough insulation but once we explain how much insulation is actually needed to make your home efficient people understand that they don’t have anywhere near enough. It is common knowledge that hot air rises which is why a properly insulation attic is one of the most important things you can do for your home. By adding attic insulation to your home you are guaranteeing to save money and also have a more comfortable home. Not having a properly insulated attic is equivalent to constantly leaving one of your windows open. Don’t wait any longer to learn more about the attic insulation methods we have available in your area!.

Attic Insulation Services Available in Sterling:

  • Blown-in Insulation
  • Blown Fiberglass Insulation
  • Radiant Barrier
  • Rigid Foam Insulation

Crawl Space Insulation Experts

Do you need crawl space insulation installed or replaced? If so, you're in the right place! A damp crawl space with falling or sagging insulation usually means the space has a moisture problem. If that is the case our team of experts can provide a vapor barrier to keep moisture out of your crawl space. We can then replace your existing insulation with a better option such as rigid foam or spray foam insulation. If your crawl space is completely missing insulation then your home is most likely cold and drafty. This is because the environment in your crawl space will transfer to other parts of your home, which is why proper crawl space insulation is essential to keeping your home comfortable and your energy bills low. To learn more about crawl space insulation cost, call, or click today!

Complete Insulation Services You Can Trust!

Comfenergy is Northern VA's preferred home insulation and air sealing services company. We have helped many homeowners not only reduce their home energy bills but improve the overall comfort of their homes without patented home insulation solutions.  Did you know that most modern homes do not have adequate insulation? Because of this, your home may feel drafty or uncomfortable throughout the year, mostly in the summer and winter, and this can increase your home energy costs. Proper insulation in your home allows your heating or air conditioning systems to work more efficiently which will save you money. 

We offer a wide variety of home insulation products and services, and each one serves its own unique purpose.  Our most popular form of insulation is spray foam.  Spray foam insulation is extremely versatile and can be used almost anywhere in your home. Spray foam insulation is one of the best ways to lower energy costs, sometimes 30% or more!

Along with spray foam, we use many other different types of insulation as well. Some of our other insulation products include rigid foam, blown-in, cellulose, fiberglass, radiant barrier, and much more.  We understand that insulation is only part of the home energy and comfort equation, so because of this, we can insulate any area of your home.  We insulate spaces such as attics, basements, crawl spaces, walls, floors, garages, and much more.  If your home is uncomfortable or energy bills are too high, contact us today for a FREE home insulation quote!

Home Insulation Services:

Comprehensive Home Energy Audits

Do you think your home is not as energy efficient as it could be? The home energy experts at Comfenergy offer homeowners of Sterling custom home energy audits.  Before we perform any work in your home, we will take the time to sit with you and discuss what areas of your home are your most problematic, and figure out if you are having common issues.  We till perform our energy audit, and once we have the results, we will go over our findings with you and figure out the next step.  We believe that this approach is the most beneficial for both parties because we can prioritize whatever work needs to be done without wasting your hard-earned money.  If you are interested in a comprehensive home energy audit, contact us today!

Get your FREE, no-obligation services estimate in Sterling, Virginia, you'll also receive a free copy of "Saving Energy and Money at Home," a great book to use as you begin to create a more comfortable, healthy, and energy-efficient home!

Case Studies From Sterling
A home in Sterling, VA wanted to make a few rooms in their home more comfortable throughout the year. This home had a cantilevered floor, which is a...
This homeowner in Potomac Falls, VA noticed that his gutters were constantly clogged with leaves. The home is located in a wooded area and surrounded...
The team at Comfenergy needed training in a new product used for Sound Control improvements in windows as well as Insulating Windows.
Press Releases From Sterling
March 4th, 2016

Barbara Comstock, Republican Member of US Congress from Virginia's 10th District ...
March 4th, 2016 Barbara Comstock, Republican Member of US Congress from Virginia's 10th District visits Comfenergy in Sterling to show interest and learn what she could do to support this growing concern.... [Read more]
Work Requests From Sterling, VA
Project Location: Sterling, VA
Interested in getting an estimate on removing old insulation and installation of new.
Project Location: Sterling, VA
Need basement insulation installed in some areas Need ductwork inspected Need basement sealed in some areas Need quite for attic insulation
Project Location: Sterling, VA
I am a light sleeper and my room faces the street hence traffic noises wake me up often.
Project Location: Sterling, VA
Space between finished (drywall) garage and living space over garage is uninsulated. Insulation in attic is insufficient (maybe 4 inches deep blown fiberglass)
Project Location: Sterling, VA
Hello! Upper level of home is much hotter than the rest of the house. It is 3:30pm and thermostat states 80 degrees in that area. Temperate is cold in basement. New(ish) AC unit. Not sure if the attic fan has died or insulation issues. Would love an estimate for possible insulation and/or fan replacement. Small closet access to attic blocked, hoping for possible access through large filter opening in hallway ceiling. Available for appt on the weekends if possible. Thank you!
Project Location: Sterling, VA
I think there's mold on some struts and rafters, plus it's too hot. I probably need to replace the fiberglass by something else.
Project Location: Sterling, VA
Our upstairs gets very hot in the summer and we have a separate unit for the upstairs. The rooms seem to stay very warm regardless of the temp setting. Curious if it's just our windows or if it's also the attic.
Project Location: Sterling, VA
Looking for attic insulation and possible ductwork repair/rework
Project Location: Sterling, VA
2 story plus finished basement house: 1100 square-foot basement 1100 square-foot first floor 800 square-foot second floor The house was built in the 1980s. A single furnace and AC unit, both less than 10 years old. The basement is meat locker while the second floor is a furnace. We have dampeners to redirect air, but last time we adjusted them we got lots of back-pressure (I think?) alarms. There are certainly some drafts in the house. We are looking for: 1. Home energy audit and estimate for improving current insulation. 2. Estimate / advice on making house dual-zoned, possibly adding a heat pump dedicated to the second floor. 3. Any other advice / next steps.
Project Location: Sterling, VA
I'm looking for an estimate on attic insulation, sealing, and possibly installing an attic fan. Thank you!
Project Location: Sterling, VA
6+ window replacement and attic insulation
Project Location: Sterling, VA
Thermostat set to 70. Yesterday, main floor = 70, 2nd floor = 77, 3rd floor = 85. Today had HVAC tech come out. Said unit is functioning properly and probably duct issue. Have a baby sleeping on 3rd floor and need better air distribution throughout home.
Project Location: Sterling, VA
3 story townhouse. 12 degree difference between top and bottom floor.
Project Location: Sterling, VA
Project Location: Sterling, VA
We have some duct work in the basement that we believe is dripping condensed water on to our drywall ceiling. We are hoping your company could insulate said duct work and prevent the condensation.
Project Location: Sterling, VA
Crawl space needs attention
Project Location: Sterling, VA
Need to remove and replace insulation in our attic.
Project Location: Sterling, VA
Rodent issue in the attic - Inspect the attic first. May need to seal-inside-outside, treat, disinfect, clean attic, and replace insulation
Project Location: Sterling, VA
Need residential home spray insulation into box under bay windows
Project Location: Sterling, VA
Home inspection on "new to us" home revealed some minor basement and attic insulation issues we'd like to have reviewed/corrected.
Serving the following Sterling, VA zip codes
20163, 20164, 20165, 20166, 20167

our service area