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Top-Rated Insulation pros in Sullivan - Updated Nov 2026

Avatar for Insulation of Maine, Inc.
Insulation of Maine, Inc.
4.9(
15
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Sullivan, ME and surrounding areas

Approved

In business since 2016

Free estimates

Customers say: Quick response

"Needed insulation in basement and in attic. Got a prompt response for an estimate, no delays in getting the work done. Charged what they said and were respectful of our schedules and to our home. Our house is noticeably warmer and less drafty. Helpful in getting the paperwork together for a state rebate. Great company."
Drill and fill
Insterior Dense pack
Dense pack cellulose
Dense Pack cellulose
dense pack exterior walls

+13

Response time1 day
1 neighbors recently requested a quote
Recommended by100%of homeowners
RS Insulation
5.0(
4
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Sullivan, ME and surrounding areas

In business since 2010

Free estimates

Welcome to RS Insulation. We have over 8 years of experience in the insulation industry. We take pride in the work we do and we treat every project as if it was our own. Give us a call today for your free estimate!

Response time2 days
Recommended by66%of homeowners
Avatar for octagon-restoration
octagon-restoration
4.7(
96
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Sullivan, ME and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"We had water damage due to a leak in our roof. We contacted Octagon because of their glowing reports on Angie's List. I cannot say enough about the company. Jessica, the coordinator, was very professional and excellent at keeping me informed on who was coming and when. She assigned the project to Heather, one of the project managers. We were extremely pleased with Heather. She was incredibly professional and very well educated in water damage mitigation and mold remediation. She called to let me know when she was coming, arrived on time, inspected the damage, immediately knew we had a mold problem and began the work to remove the molded areas and installed a HEPA filter to clean out any spores floating around as a result of the work being done. She communicated in detail everything regarding the job -- what she saw, how she was going to fix it, etc.. etc.She even crawled up into our attic to see if there was any damage above the ceiling -- truly above and beyond. As this was an insurance claim, she worked with State Farm to ensure that everything that needed to be done for our benefit was discussed with and agreed to by our claims adjustor. I cannot say enough about both Heather and Octagon. Heather explained that the owner of the company hired professionals and everyone was expected to have at least one certification in one of the areas that Octagon provided service in. It was evident by my experience with all their employees that they hired and retained the best. I would most definitely use them again and highly recommend them to anyone."
Water extraction.
Octagon vehicles
Drying structure damaged by water.
MOLD REMEDIATION
Dirty air duct.

+2

Response time6 hrs
Response rate100%
Recommended by90%of homeowners
Efficiency Foam LLC
5.0(
3
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Sullivan, ME and surrounding areas

Efficiency Foam provides high quality installation of closed cell spray foam insulation. We guarantee your satisfaction and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out our services offered and call or click to schedule a free estimate today.

Camp in Garland
House on the lake
Camp in Garland
House on the lake
Camp in Garland

+9

Recommended by100%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,689
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Sullivan, ME and surrounding areas

In business since 1971

Credit card accepted

"Roberto was the technician and he was very professional, polite, and personable. He inspected the rest of our system and told us things that needed to be changed or repaired. He showed me pictures of everything. Everything he told me about was accurate. He quoted me a price for R38 insulation , Some of our ducts were plastic and he recommended them to be changed. I agreed completely and didn't know they were plastic. I would have had them done the work but I had no price comparisons to make and besides I didn't have the money right then. So he just finished the vent cleaning and left his card. He did a great job on the vent cleaning and was happy with the work."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Recommended by65%of homeowners
Abbott Insulation Plus
5.0(
1
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Sullivan, ME and surrounding areas

In business since 2000

Free estimates

Credit card accepted

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

Recommended by100%of homeowners
Avatar for New England Home Renovations LLC
New England Home Renovations LLC
4.0(
311
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Sullivan, ME and surrounding areas

In business since 1983

Free estimates

Emergency services offered

"Our old water heater died.  Called around for some estimates, he was the best price.  I got someone on the phone right away. Richard the owner was out to give me an estimate within a few hours, and then came back to install the next day.  Great guy, great service, great price.  I'm also looking to have him do some work on my house - in the process of getting estimates for exterior house painting and a partial bathroom remodel.  Would definitely recommend to friends."
Before
After's
New boiler install
Removal of cast Iron to PVC.
Additional Photos

+37

Recommended by89%of homeowners
Christian MciItyre Insulation
New to Angi
Batt, Rolled or Reflective Insulation - Install or Upgrade

Serving Sullivan, ME and surrounding areas

In business since 2020

Free estimates

Offers commercial services

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers' needs. It is our mission to provide excellent workmanship, and complete customer satisfaction from start to completion of a project. In order to understand the needs, and expectations of our customers, we take great care to work, and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. \n

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Insulation FAQs, answered by experts

Most heat in a garage is lost through air leaks in windows, doors, and walls. This is especially true if the walls are uninsulated, which is common in garages. Consider insulating your garage before installing a garage heater to ensure the heat it generates isn’t wasted, making it less efficient.

We do not recommend fiberglass insulation for soundproofing purposes, especially if you are working on a room that’s part of your living space. Fiberglass insulation is dangerous, and the installation process is hazardous. It is also harmful to the environment. When there are so many newer, healthier non-fiberglass alternatives in the market, the lower cost of fiberglass insulation simply doesn’t justify the harm and danger it poses.

If you plan to heat or cool your garage, you’ll need to insulate the garage ceiling. Insulating your garage ceiling will make your garage much more energy efficient and save on heating and cooling costs. Not only does insulation make your garage more energy efficient, it helps reduce noise and can extend the life of your garage roof. You can use fiberglass, cellulose, mineral wool, or spray foam insulation for this project.

Minimal but regular checks can ensure maximum thermal performance.

Insulating under a concrete slab foundation is a great way to improve the energy efficiency of your home, but it isn't necessary for outdoor projects like driveways, patios, sidewalks, and walkways. If you’re pouring in cold weather, insulating under the slab can help prevent heat loss from the concrete, aiding in proper curing. Along with accelerants, this can be a good way to ensure strong concrete despite pouring in the cold.

The Sullivan, ME homeowners’ guide to insulation services

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