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TRUSTED BY BETHESDA, MD HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon219
    Verified insulation services reviews

Top-Rated Insulation pros in Bethesda - Updated Nov 2026

Avatar for Prudent Homes
Prudent Homes
4.7(
238
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install+2 more

Serving Bethesda, MD and surrounding areas

Approved

In business since 2002

Free estimates

Warranties offered

"Prodent Homes did an excellent job with our attic remediation. They removed the old insulation, sanitized and re-insulated the entire attic. The owner David was easy to communicate. The crew lead Jose was very experienced and communicated well. The job was done professionally. We are happy with the results and will use them again if we have another insulation job."
28 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Founders Insulation
Founders Insulation
5.0(
20
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Bethesda, MD and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

"HIGHLY RECOMMENDED! GREAT WORK AND STELLAR CUSTOMER SERVICE! I had an excellent experience with Founders Insulation and owner Brian Handy. Brian's a great guy—knowledgeable, honest, responsive, and easy to work with. He clearly explained what was needed, what was optional, and why. He showed exactly where the insulation and air-sealing problems were, giving me complete confidence in his recommendations. There was no pressure to add unnecessary work, and everything stayed within budget. Work included removing old attic insulation, extensive air sealing, insulating the attic to R-60, sealing the attic hatch, adding insulation to vaulted ceilings, and spray-foaming problem areas and a cantilever. The team did an incredible job. I was especially impressed with how thoroughly they cleaned up afterward. Most importantly, I've noticed a significant decrease in my heating and A/C costs since the work was completed. Excellent communication, quality work, fair pricing, and no surprises."
Exterior Walls
Exterior Walls
Roof line
Exterior Walls
Exterior Walls

+11

Response time12 hrs
220 neighbors recently requested a quote
Recommended by63%of homeowners
Avatar for Koala Insulation of Washington DC
Koala Insulation of Washington DC
5.0(
14
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Bethesda, MD and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

Here at Koala Insulation of Washington DC, we pride ourselves on our professionalism, as well as our ability to complete every job to the homeowner's total satisfaction. We never leave a job unfinished, or a homeowner not 100% satisfied with our level of service. We handle insulation work in Washington DC and the surrounding areas - Call today! \n \n

Project Photos
Project Photos
42 neighbors recently requested a quote
Avatar for Terra Insulation
Terra Insulation
4.9(
7
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+2 more

Serving Bethesda, MD and surrounding areas

Approved

In business since 2020

Free estimates

Warranties offered

"Great! Job was complete .... removal of existing 50+ year old insulation, air sealing attic, baffle installation, installed 18 inches new fiberglass blown insulation, and new whole-house fan. Job started and completed as proposed. Crew on-time, quietly performed their work, and left spaces clean when done. Definitely worth the cost as noticeable improvement in second floor temperature and humidity readings."
Owens Corning ProPink R-49 Blown-In Insulation. Our most popular product
These vents help your attic circulate air. With attics reaching over 120 degrees in the summer these are very important. They prevent mold and increase the lifetime of your insulation. Most other contractors miss installing these.
Look at the difference! Our foam is fire-rated which allows us to air seal around penetrations that contractors never could before.
Most homes have penetrations all over there attic. Imagine trying to blow up a balloon with a bunch of holes. It will never fill up. Now imagine trying to blow up your house with air conditioning and heating with a bunch of holes in the attic. It will never fill up.
Recessed can lights are notorious for leaking air. Recessed can light covers help with air-sealing your living space and prevent fires.

+1

Response time3 days
5 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for RetroFoam of Philadelphia
RetroFoam of Philadelphia
5.0(
22
)
Spray Foam Insulation - InstallInjection Insulation - Install

Serving Bethesda, 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%
122 neighbors recently requested a quote
Avatar for Home Genius Exteriors
Home Genius Exteriors
4.9(
1,251
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Bethesda, 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%
2619 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 Bethesda, MD and surrounding areas

Approved

In business since 2009

Free estimates

Credit card accepted

"We contacted Atlas for an attic insulation estimate. They persuaded us to pay $100 for an energy audit which put us into the Maryland rebate program. As we discussed the project I told the estimator that our kids bedrooms had never gotten much airflow. He said they could seal the holes in the ducts with a spray system. Long story -short: they found we were losing 49% of our conditioned air through holes in the ducts into walls and ceilings. Atlas did the insulation, the duct sealing, installed exhaust fans in the bathrooms, sealed basement walls, and weather-sealed two doors. Their workers were professional, efficient, and incredibly courteous. With the rebate we got incredible value for our costs. Not cheap but worth every penny. HIghly recommended."
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
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Showing 1-10 of 123
Insulation FAQs, answered by experts

In Bethesda, insulation service projects often uncover issues like old insulation containing hazardous materials, outdated wiring, or unsealed air leaks. You may need to upgrade ventilation systems or adjust ductwork to meet current energy codes. Permits and compliance checks can also add steps. Addressing these issues during installation ensures your home’s thermal envelope is effective and prevents costly repairs down the line.

Helpful?

Insulation in Bethesda benefits from annual inspections to check for moisture intrusion, mold, or compromised vapor barriers, especially after humid summers or wet winters. Look for settling, pest activity, or new air leaks each season. Professional assessments every few years help maintain optimal R-values and energy efficiency. Proactive maintenance ensures your insulation continues to perform well and keeps your home comfortable year-round.

Helpful?

In Bethesda, combining insulation service with upgrades like air sealing, HVAC improvements, or new windows can maximize your home’s energy efficiency. Tackling these projects together streamlines scheduling, reduces labor overlap, and improves your home’s overall thermal envelope. This approach can also make you eligible for larger energy rebates and minimize disruptions, making the upgrade process more convenient and effective.

Helpful?

In Bethesda, the humid summers and chilly winters require insulation service projects to address both moisture control and thermal performance. Using vapor barriers and moisture-resistant insulation helps prevent mold in high-humidity months. Selecting materials with high R-values ensures year-round comfort. Scheduling installation in spring or fall avoids extreme temperatures, and adding attic ventilation supports long-term energy efficiency and indoor air quality.

Helpful?

Upgrading insulation in Bethesda can make your home more attractive to buyers by improving energy efficiency and indoor comfort. Enhanced insulation often leads to lower utility bills and better thermal performance, which are strong selling points. Providing documentation like energy audits or efficiency certificates can further boost your home’s marketability and help it stand out in Bethesda’s competitive real estate market.

Helpful?

The Bethesda, MD homeowners’ guide to insulation services

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