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Avatar for Comfenergy, LLC
Comfenergy, LLC
4.6(
54
)

Serving Markham, VA and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"The crew that originally came out were very efficient and friendly. They finished almost everything in the time that was stated. The only thing with them that I was concerned with was that they keep asking me what they were supposed to be doing. They knew that they were supposed to doing insulation but didn't have the details. And when i told them that I would have to go back to my paperwork they said that they would call the project manager. On the 3rd day they needed to do one last thing to an outer wall but couldn't do it because it was too cold and they were concerned that if they tried to remove the siding it would crack. They left on a Wednesday telling me that someone would contact me to come back on Saturday to finish the job. Fast forward to Friday, I get a few missed calls and then text messages saying that they had a crew in the area that wanted to come by in 30 mins. I wasn't home but finished up what I was doing to meet them at my house. When they get there they don't even know what the job is that they are supposed to be doing and don't have a ladder tall enough to reach the area. So they decided that they could do the job from the inside and said that they would need to drill a couple holes in my closets to fill the wall with insulation. They were very admit that that the holes would be repaired and the drywall fixed and painted and that someone in the company would call me and a crew would come out to do the drywall repair. So they do their part and leave. After they leave I realize that they put 6 holes in my wall. Not what i was expected but they did a decent job on plugging the hole back up with the piece of drywall that they removed. I waited for someone to call me about fixing the drywall but they didn't call. So after a week of waiting I called the company to ask about it and the mold remediation issue I was having (more on that in a sec). They seemed unaware on the drywall needing to be fixed and said they would send someone out to look at both things. A few days later someone comes out. They were unaware of the drywall repair but were there to look at the mold issue. Now about the mold issue. I will get back to the drywall in a min. So I paid for them to spray something on a strip of mold that we had in our basement and was told that after it has been sprayed that it would like nothing was ever there. Well after them spraying it twice it still looked awful. The wood looked but as black as before they came. So when these guys came to look at it they said that there was definitely no mold there. the problem was with my wood. So much for it looking like nothing was there. Now i have to hire someone else to sandblast it or something. So after these guys looked at the basement they said that they would look at the drywall. They look at it and are like "oh, i don't think we have the materials on our truck to fix this but I will take a look". They did have the materials and would tape it and mud it but weren't really experienced in drywall repairs but they knew enough to do the job. I should have stopped them right there but I thought it would be okay. Well once the mud dried I could tell what an awful job they had done. I will have to either try to fix it myself or hire someone to do it. And I probably should have called them back again but I am really tired of them sending me people that don't know what the job is before they get to my house and are not prepared. Only getting a C because the first crew was decent."
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+68

28 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Home Genius Exteriors
Home Genius Exteriors
4.9(
429
)

Serving Markham, VA and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"I was impressed with the quality and skill of the crew, they knew exactly what to do and the result was excellent. I was extremely impressed with the quality of the insulation, and feel much more comfortable with my home! The foreman was excellent, very skilled, and the turn out was outstanding!"
Windows
Windows
Windows
.
Siding

+9

Recommended by89%of homeowners
Avatar for Kelvins insulation
Kelvins insulation
5.0(
9
)

Serving Markham, VA and surrounding areas

In business since 2016

Free estimates

Credit card accepted

"This guy called promptly to schedule an in home consultation and came promptly the next morning. I received a courtesy call from him saying that he was running 10 minutes behind schedule. When he got here, he was friendly, he evaluated my attic and determined that no insulation was needed. I tried to push him a little to say that we might need a little more insulation up there since that particular room gets colder than others but he insisted that adding insulation wouldn't help. I think others might have tried to get some work out of the visit, but not these guys. I would recommend them based on their honesty, fairness, and integrity."
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+15

Recommended by100%of homeowners
Avatar for Handy Development llc
Handy Development llc
4.9(
9
)

Serving Markham, VA and surrounding areas

In business since 2019

Free estimates

Credit card accepted

"Excellent workmanship!!!! I highly recommend them for any insulation project. Very professional and respectful. Answer all my questions and took time to make sure I understood. Superior company."
Fairfax va Install
Martinsburg wv ( Attic barrier
Martinsburg solar fan installed
Winchester Va radiant install
Salem Virginia install

+45

Recommended by100%of homeowners
HomeLand Insulation, LLC
4.6(
8
)

Serving Markham, VA and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"Homeland insulation had the best price among the 4 estimates that I got. Mike obviously knows about house construction, as he was able to tell me things about my house that I did not know. For every issues that I posed to him, he came up with a workable and cost-effective solution. Mike inspected the entire attic and meticulously sealed all floor penetrations by pipes, flues, lighting & fan fixtures including 14 recessed lights. He installed baffles to insure ventilation after insulation. After Mike has blown in the insulation, we had close to R60 (or 20) evenly for the entire attic. In addition, Mike built a hatch above the garage at my request. He did all of the above with obvious competence and with a pleasant customer-focused attitude. I do recommend them."
Recommended by87%of homeowners
Avatar for Evergreen Electric LLC
Evergreen Electric LLC
4.9(
36
)

Serving Markham, VA and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"I called Evergreen Electric and setup an appointment for the next day to perform what I figured would be a couple small jobs and to receive an estimate to run cable into new rooms. The original appointment was delayed because of a power outage on another job, but speaking to Josh on the phone, he was willing to come by as soon as he was finished even though it would have been well into the evening. I told him the following day would work fine and we rescheduled the appointment.
Josh arrived the next day and examined our situation. Our house is nearly 40 years old and it turns out the problems were much deeper than I thought. Josh crawled into the attic and rewired the junction boxes that were not just loose but had previously been wired incorrectly. He also spent well over an hour attempting to diagnose why our breaker was tripping without much of a load on it. He was very thorough in his troubleshooting. He replaced the breaker with a higher amp version and the problem is fixed, but he also indicated there is likely more faulty wiring running through the attic buried under the insulation and someone should come back to assess the entire electrical system.
Josh was very courteous and professional and answered all of my questions. After spending about 2.5 hours with us, I was expecting a large bill. I was very pleased when he told me he would only be billing me for one hour.
About 30 minutes after he left, we noticed that a light in the hallway would not turn off. I called to report it and Evergreen responded immediately. Josh came back right away and fixed the problem. He even replaced the light switch free of charge. It is nice to see a company that stands by its work and acts so quickly when something is wrong.
I would highly recommend Evergreen Electric. They are prompt, thorough, and stand by their work.


"
Recommended by100%of homeowners
Avatar for ARS / Rescue Rooter Manassas
ARS / Rescue Rooter Manassas
4.4(
718
)

Serving Markham, VA and surrounding areas

In business since 1947

Emergency services offered

Credit card accepted

"Customer service is top notch. Estimator arrived on schedule and the work was completed on schedule. Insulation crew was professional and very neat. The entire process couldn't have been smoother.
"
Recommended by87%of homeowners
Contractors Unlimited Co
5.0(
10
)

Serving Markham, VA and surrounding areas

In business since 1989

Emergency services offered

"We had a horrendous situation with a basement floor installation that went wrong leaving our house full of fumes, and a week later we discovered our basement was contaminated by asbestos in the process.  When we called Bill and Contractors Unlimited, they were extremely responsive.  Although other companies gave us bids, Bill was able to work his schedule to fit us in weeks sooner than the others.  Although the cost was a bit more, that saved us money because we were displaced and could not even go into our house because of the fumes.  CU set up negative air machines to replace the air, they followed asbestos abatement laws, they cleaned every item that could be salvaged in our house.  They even saved more than we thought which really reduced our overall expense.  Bill and his team were extremely professional, friendly, helpful, and really went out of their way to ease our stress from this situation.  At the end of their process, Bill arranged for a air quality inspection which we happily passed - able to return home.  I would gladly recommend Contractors Unlimited for asbestos abatement.  I just wish we had called them before the floor guys  created such a disaster.  Thank you Bill!
"
Recommended by100%of homeowners
Reliable Home Improvement & Plumbing LLC
4.5(
343
)

Serving Markham, VA and surrounding areas

In business since 2005

Emergency services offered

Credit card accepted

"Contractor arrived on time.
Contractor brought all materials in the house to do the job, so he did not have to go back and forth.
Service took approximately 6 hours and contractor was working the entire time.
Contractor bagged up all old insulation and drywall.
Contractor was easy to work with and very professional. I would hire him again.
"
Recommended by90%of homeowners
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FAQs for insulation service projects in Markham, VA

Old insulation should be removed when it shows damage, contamination, or heavy deterioration. If you notice water stains, rodent droppings, mold, or large gaps, plan on taking it out to protect your home’s energy performance and indoor air quality. Removing compromised material eliminates health hazards, cuts energy loss, and sets the stage for a safer, more efficient attic—all while keeping utility bills in check.

R-value measures how well insulation resists heat flow—the higher the number, the better it slows heat transfer. The right R-value keeps your home warmer in winter and cooler in summer, saving energy year-round. Match the rating to your climate zone and have a pro verify performance over time, because moisture or settling can lower R-value and cut efficiency.

Attic insulation can stay in place for 80 to 100 years, but its performance often drops after the first 15. As dust, moisture, or mold build up, the material loses R-value and allows heat to escape. Schedule periodic inspections so a pro can tell you when replacement makes sense—helping you keep energy bills down and indoor comfort up.

You can over-insulate an attic. Beyond the recommended R-value, extra layers don’t add efficiency and can trap moisture, leading to mold or reduced performance. A local insulation pro can measure current levels, confirm the right target for your climate, and advise on any adjustments so you avoid future energy or maintenance headaches.

Insulation can be damaged by mold, pests, water leaks, or accidental electrical contact. When the material is compromised, it loses R-value and can introduce health hazards. Removing and replacing affected sections restores efficiency, while routine inspections from a qualified pro help you catch problems early and keep your attic safe and energy-smart.

The Markham, VA homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.

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