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    Average homeowner rating
  • Verified reviews icon116
    Verified insulation services reviews

Top-Rated Insulation pros in Gwynn Oak - Updated Nov 2026

Avatar for Koala Insulation of The Greater Baltimore Area
Koala Insulation of The Greater Baltimore Area
4.8(
13
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Gwynn Oak, MD and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

"We had insulation installed a week earlier by Koala. During the insulation, Jasper (insulator) suggested another area that we might consider installing blown-in insulation. We agreed and the second job was performed on Friday, the 24th. Jasper and Richard were on time, the insulation project was well done and they left the area very clean. Would use them again."
Insulation Projects
Spray Foam Insulation
Insulation Projects
Blow-in Rig
Truck

+9

Response time8 hrs
1 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for RetroFoam of Philadelphia
RetroFoam of Philadelphia
5.0(
22
)
Spray Foam Insulation - InstallInjection Insulation - Install

Serving Gwynn Oak, MD and surrounding areas

Approved (Corporate)

In business since 2023

Free estimates

Warranties offered

"We are extremely satisfied with the whole process of our house being insulated. First we had the walls done, and then a couple weeks later we had our attic insulated. The crew were so nice, friendly, and knowledgeable. We are very satisfied with everything. Thank you, everyone."
RetroFoam Wall Insulation
Installing RetroFoam
RetroFoam with Siding
RetroFoam with Brick
Response time1 day
Response rate100%
121 neighbors recently requested a quote
Avatar for Terra Insulation
Terra Insulation
4.4(
16
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Gwynn Oak, MD and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"They took the time to explain the options and inform my decision-making. They answered all of my questions with patience and good humor. I believe I have received great value for the money I have spent. They were flexible when I wanted to make a change once work had begun. Since the house has been air sealed and insulated we have been warm and comfortable. I highly recommend Terra Insulation for your insulation needs."
R-49 Blown Fiberglass
Baffle Vents
Recessed Can Light Covera
Attic Penetrations- before air sealing
Air Sealing After

+1

Response time3 days
Response rate97%
Recommended by92%of homeowners
Avatar for Home Genius Exteriors
Home Genius Exteriors
4.9(
1,249
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Gwynn Oak, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2004

Free estimates

Emergency services offered

"Prompt, courageous and provided exactly what I needed. There was little to no insulation nor room in the attic. I priced it out and started to wonder ‘..can I really do this job myself?’ Maybe 10 years ago but the price for Pink blown- in insulation was so good- I couldn’t afford not to have Home Genius Exteriors do the job. I am so happy to see that beautiful sea of pink insulation. Kudos"
WINDOWS
WINDOWS
WINDOWS
WINDOWS
SIDING

+73

Response time4 hrs
Response rate93%
2727 neighbors recently requested a quote
Avatar for Atlas Home Energy Solutions
Atlas Home Energy Solutions
4.1(
34
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Gwynn Oak, MD and surrounding areas

Approved

In business since 2009

Free estimates

Credit card accepted

"I hired Atlas Home Energy Solutions to remove old insulation and replace it with the foam technique. However, I ran into numerous unexpected problems due to a slow leak from old pipes. It took awhile to sort out. Atlas Home Energy Solutions gave me lots of expert advice. They were willing to come out and review the situation. They were also willing to reschedule and wait until another contractor dealt with the water issue and its ensuing problems. They helped me make some difficult decisions before they could insulate the crawl space. When it was ready for them to come and insulate the area they bumped their schedule forward to get it done. This company did sterling work. Their expertise and professionalism were outstanding. They really know what they are doing and guided me through a more protracted process than originally envisioned. I would highly recommend them to anyone."
Visual Inspection of all Areas of your Home
Attic Insulation and Air Sealing
Infrared Camera Inspection
Attic Spray Foam
Blower Door Whole House Air Leakage Test

+11

Response time1 day
Recommended by87%of homeowners
Avatar for Xanvria LLC
Xanvria LLC
5.0(
3
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Gwynn Oak, MD and surrounding areas

Approved

Free estimates

Credit card accepted

"We had Xanvria remove the old insulation in our attic, air seal the attic, and install new R-49 batts. They did a really good job, were professional, and explained what they were doing along the way. Everything came out clean and we?re very happy with the work. I would definitely recommend them."
before
after
Insulation
Insulation
2 neighbors recently requested a quote
Cameron Home Insulation
4.6(
40
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Gwynn Oak, MD and surrounding areas

In business since 1907

Free estimates

Credit card accepted

"There was a problem initially with the radiant barrier installation - the first crew of two were installing 30" wide rolls lengthwise along the roof end to end  instead of from ridge to eave as the manufacturer recommends and made a couple of other minor mistakes which were easily corrected. After talking to the manufacturer, the sales rep offered to take out what had been installed and re-install according to spec or continue as already done with sealing of all seams and a discount on the job. Done this way, the foil would not have the insulation properties per spec but would provide the radiant barrier I desired. I chose the letter option and the barrier work was continued by another crew on the 2nd day. On the 3rd day the crew finished up with the barrier then blew in the installation.

With the exception of the initial problem, the work was done neatly and professionally by courteous workmen who cleaned up completely after the job was done.

"
Recommended by100%of homeowners
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Insulation FAQs, answered by experts

The benefits of insulating your pipes include preventing freezing, sweating, and condensation. In addition, insulating your pipes can make your home more energy-efficient by keeping your pipes from losing or gaining heat. You’ll be able to turn the temperature of your water heater down by two to four degrees Fahrenheit. According to the U.S. Department of Energy, this can reduce energy costs by 3% to 4% per year.

Through R-value assessments based on climate and existing insulation.

The heat loss through a poorly insulated attic when you’re running your furnace or heat pump during cold weather can be as high as 25%. This means you could see significantly higher energy costs to make up for this heat loss. The cost of adding insulation to the attic may eventually pay for itself through lower energy bills. If you decide to add a radiant barrier too, the radiant barrier cost may also pay for itself over time.

Heat lost through uninsulated basement walls can account for up to 30% of the total energy lost through heat transfer to the outdoors. While homes in mild climates won't gain as much benefit from having an insulated basement as those in cold climates, the effects are still noticeable on your energy bill.

The best time to insulate a garage ceiling is when the weather is mild and dry. That means it shouldn’t be stormy, snowy, or raining, and the temperatures should be comfortable. Ideally, you’ll insulate your garage ceiling in the fall, before winter hits. Not only will you be the most comfortable, but you’ll also likely see the greatest energy savings heading into the colder weather with a newly insulated garage.

The Gwynn Oak, MD homeowners’ guide to insulation services

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