3rd year as a Best Pick
certified company
Based on 117 reviews
Our Certification Process
Best Pick Guarantee
Verified License(s)
Verified General Liability Ins.
Verified Workers' Comp
3rd year as a Best Pick Call
"Comfenergy begins every interaction with a full evaluation of the home, including blower door testing and thermal imaging. This evaluation allows the homeowner to see the invisible causes of their discomfort and high energy bills. We provide solutions, not just insulation."

Justin Dobson | Co-owner
Company Information
Services Offered
Comfenergy installs all types of insulation, including cellulose, fiberglass, spray foam, and foam board in crawl spaces, attics, floors, and walls. The company also offers duct cleaning and repair, air sealing, window replacement, mold remediation, moisture control, and home comfort and energy services.
Services Not Offered
Comfenergy does not offer emergency water cleanup services.
The company offers a one-year workmanship warranty.
Company History
Comfenergy was started in 2010.
The company is a member of the Loudoun County Chamber of Commerce. Comfenergy was a finalist for the chamber's 2016 Innovative Business of the Year Award and a runner-up for its 2014 and 2015 Service Business of the Year Awards. Additionally, owner Justin Dobson was a recipient of the chamber's 2015 Entrepreneur of the Year Award.
Areas Served
Prince William, Fairfax County, Loudoun County, Arlington County
A selection of 117 homeowner reviews:
“They're a wonderful company. I've come across a company like them very seldom in my life. Everything that they did was honest. They did what they said they were going to do, and they did it well. They're an A+ company. I can't say enough good stuff about them. I also met the owner, and he's why that company is the way it is. I certainly would recommend them.”
“Comfenergy got the work done efficiently. Everything was cleaned up beautifully. They did everything they were contracted to do. I'd give them an A. Their punctuality was fabulous.”
“I'm very happy with them. They were A+ people—super. I'm so pleased with the customer service.”
“I'd give Comfenergy a solid A. They were on time and did exactly what they said they were going to do. They did a beautiful job; it looks great. We're very happy.”
“I can't think of any problems we had with Comfenergy. They did the insulation work for us in February, and they were excellent. I'd give them an A+. They did the work for us just before we put the house on the market. We were very pleased with their advice, counsel, and the quality of their work. The guy who set up the whole project and the people who did it were all excellent.”
“We're pretty happy with what they did to our house. I'd give them an A+. I already recommended them.”
“I'd give them an A+ for everything.”
“I'd rate them with an A+.”
“It's been great. I'd give them an A+. They were great.”
“I'd give them an A+. The estimator was really knowledgeable, and he conveyed that knowledge in a way that was understandable. It really enabled the whole project.”
“I'd give them an A+.”
“The work was done in a timely fashion. The people I corresponded with were professional. They knew what we needed and were able to get the job done well. They were also willing to come back when we'd had some spots that they missed, some insulation spots. They came back and touched it up in a timely fashion. It was a good experience. I'll give them an A+.”
“It was an A+ job.”
“Comfenergy deserves an A+.”
“I'd give them an A+. They were very professional. They knew what they were doing. They scheduled quickly, came, and did everything very quickly. They were great.”
“I'd give them an A+. I like their product.”
“Comfenergy were here about a year ago. It was an A+ job.”
“I had no complaints with them. They were very good to work with.”
“I would give them a solid A. I would say they were good all around. It's been a year.”
“I'd give them an A.”
“It was all good. I have no complaints.”
“Everything seems to be working. I have no complaints at all. Comfenergy did everything they said they were going to do, and the attic seems to be functioning as I'd hoped, so I have no issues.”
“Comfenergy gets an A from me.”
“I'd rate them an A, though it was probably a middle-of-the-range job for them.”
“It seemed to all be very nicely done, and very clean. I'd give them an A.”
“I'd give them an A.”
“I would rate them with an A.”
“The guys were a little sloppy in their application, but otherwise good. I'd give them an A.”
“Comfenergy gets an A from me.”
“I'd give them an A grade for the work done.”
“I don't live in either house I've had done with Comfenergy, but I have clients who do and they seem to be very responsive. They come and do their work neatly, and, as far as I can tell, very completely. I have no complaints overall.”
“I would give them an A for the work they did for me.”
“I'd give them an A.”
“Comfenergy were on time. They were professional, and whatever they promised, they delivered, and it was all done in the right time span. I'd give them an A.”
“The owner and the sales rep were very good people, and they're genuinely interested in the work they do, and making sure it's done right. I'd give them an A.”
“I remember using them. We had them do some spray insulation in our garage area. We had some issues with freezing pipes above the garage—we had two burst in three years. They came in and confirmed some of our thoughts and concerns about the lack of insulation and the areas where we had issues. They came up with a game plan for how to execute it and correct it, and in a couple of months, they were completed. I would grade them an A+.”
“They were very responsive. They just put insulation in my attic after we had a pipe freeze—that's supposed to cure that problem. They were just very responsive; if you had a question, they would respond to it and answer right away. They're grade-A.”
“It was very good. They were one of the only companies that I could find to do the actual work. It was great. We had insulation put under a bay window. He showed us how he did it, and when he came, that's exactly what he did. I would grade them an A.”
“They were easy to work with, and they were fine. They installed insulation in my walls. My contractor dealt with them mostly, but everything was fine on my end. They get an A.”
“They were very professional—everyone that was here was professional, and they did a great job. I appreciated everything. They insulated a crawl space that had been giving me problems; it made a huge difference this summer, and I'm hoping it will make a big difference this winter. I would grade them an A.”
“They did the attic, and they were professional. I would rate them as an A.”
“They insulated kitchen pipes for me. We decided on what we needed based on what was happening in my kitchen—the walls had exposure to the outside, so we were able to assess what we needed. They were able to determine it, and they pumped insulation into my drywall. I just had a good experience with their technician. I got more quotes, but I thought they were more professional. I would give them an A. They were very professional, and the crew was accommodating.”
“Comfenergy was excellent. They insulated a crawl space and an attic, and the servicemen were courteous and very professional. The gentleman who had the sales information was absolutely perfect. It was a great experience all the way around. I would rate them as an A+ company.”
“They were very, very good and very professional. They checked in with us many times because it was a very large, complicated job. We'd discovered a huge leak in one of our walls; all three floors had mold, and the studs had rotted. Our main contractor found Comfenergy because they were willing to do a smaller insulation job that a lot of other companies weren't going to bother with. It was a nightmare, but they were great—A+.”
“They upgraded the insulation in the entire house, and they did an audit. They were very comprehensive. I'd give them an A+.”
“I had Comfenergy spray and clean my ducts. They're super neat people. They take your ducts and do a thorough cleaning. There are many holes in the ducts from the screws and accidents, so then, they spray a plastic coating to secure all the holes. According to his numbers, we increased our blowing efficiency by 90 percent after we used it. The owner of my heating company gave me this guy's name, and he came out and did an assessment of the insulation in my attic. Comfenergy is an A company.”
“Comfenergy did the assessment, so I just used them for the work. They determined what I needed, and then they put it in. All around, it was an A+ job.”
“They sealed the attic and did blown-in insulation. There's a little bit of a difference; we've noticed that the temperature between all three stories is the same now. The quality of service they provided was excellent, and the workers explained everything and actually helped me do a couple things in the attic before the insulation was blown in. I had an attic fan that wasn't working, and the guy helped me disassemble it because we didn't need it anymore. They earned their A+ from me.”
“Comfenergy insulated attic space in addition to doing a remodel of the attic and walls. Since we tore everything out, we knew what we needed to do. I've noticed a difference—it stays cooler in the summertime. They did A+ work.”
“They were very friendly and on time. It was my first time using Comfenergy, but I would give them an A rating.”