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  • Average homeowner rating star icon3.6
    Average homeowner rating
  • Verified reviews icon38
    Verified insulation services reviews

Top-Rated Insulation pros in Greenville - Updated Nov 2026

Avatar for AJ Pro Green Insulation Corp
AJ Pro Green Insulation Corp
4.9(
8
)
Batt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - InstallSpray Foam Insulation - Install

Serving Greenville, NH and surrounding areas

Approved

In business since 2022

Free estimates

Small jobs welcome

"We were referred to AJ Pro Green by a colleague so we had them come out for a free estimate. They showed up on time and were very professional. They insulated our basement during our remodel and we couldnâ t be happier. The job was done quickly, was within our budget, and communication was fantastic. We would highly recommended!"
Roof open cell - walls closed cell
Roof open cell - walls closed cell
Roof/Attic closed cell
Spray Foam Insulation
Spray Foam Insulation

+57

Response time2 hrs
Recommended by85%of homeowners
Avatar for ABI LLC
ABI LLC
5.0(
5
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Greenville, NH and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"I could not have been more pleased by the work and the professionalism and the cost and the results. ABI was the first company to respond to my request for bids on the project. They were at the house within days of the request and were knowledgeable about putting insulation over light fixtures embedded in the ceiling. The attic did not have access from within or outside the house and they problem-solved this in a way that was a great solution. They lay down mats so as not to dirty up the carpets and stairs and they wore gear to protect themselves from the insulation. MY house was cleaner when they left than when they arrived. All of the people working on the project were professional and knowledgeable and the cost was extremely reasonable. For the first time this winter, my house feels like it can hold the heat. Looking forward to this summer, because I'm betting it will also improve my air conditioning!"
Response time12 hrs
41 neighbors recently requested a quote
Sonart Construction Corp.
2.3(
7
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Greenville, NH and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

Sonart Construction Corp. has over15 years of experience in providing a variety of exterior and interior renovation services. We provide services to Palm Beach, Broward and Miami-Dade Counties.. We specialize in Bathroom Remodeling, Kitchen Remodeling, Flooring and the list goes on. Customer satisfaction is what determines our success, which is why we take a hands-on approach and keep the customer informed through every phase of the project. When interacting with our company, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing, and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your renovation needs. Give us a call today!

Avatar for Time To Paint
Time To Paint
New to Angi
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Greenville, NH and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Need a project done, but not sure who to call? I’m your local expert for a wide range of home improvement and repair services. With a versatile skill set in [Skill 1], [Skill 2], and [Skill 3], I specialize in tackling those tough jobs that require multiple trades. I am committed to delivering top-tier craftsmanship, dependable service, and complete customer satisfaction. No matter the task, I have the experience to do it right the first time.

Avatar for Insul-Kings
Insul-Kings
4.2(
45
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInsulation - Install or Upgrade+1 more

Serving Greenville, NH and surrounding areas

In business since 1999

Free estimates

Emergency services offered

"Insul-Kings is wonderful to work with. They called in the morning to narrow the arrival time, which is very considerate. Nate and his crew arrived on time and CRANKED like a well oiled machine. I have a 4' crawl space. You can barely crouch. No problem! That's why God invented knee pads. They foamed and installed the insulation like it was their own home. It was a work of art. and came out better than I imagined. They patiently indulged my "old man" inquisitiveness. The crew represented Insul-Kings very well. I highly recommend them. This was done through the Mass Save program. So the $2100 job only cost me about $500.00"
Blower Door
Truck
Retrofitting Cellulose
Response time2 days
Response rate100%
Recommended by73%of homeowners
SAV-ON INSULATION
4.5(
6
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Greenville, NH and surrounding areas

In business since 1969

Emergency services offered

"I was plagued with recurring ice dams in a few areas of my roof. After investigation, it was discovered that the insulation in a few visible areas was sub-par. Roland came in and quickly spotted the problem areas. He assured me that the could fix these problems immediately. He used a combination of rearranging existing batts, blown-in fiberglass and spray foam to seal the attic space, over the course of two visits. He's extremely personable and always called me back or answered the phone right away."
Additional Photos
Additional Photos
Additional Photos
Recommended by100%of homeowners
New England Energy and Gas
4.1(
52
)
Blown-In Insulation - Install or UpgradeInjection Insulation - InstallSpray Foam Insulation - Install

Serving Greenville, NH and surrounding areas

In business since 2005

Free estimates

Credit card accepted

"They have done a spectacular job in performing a bunch of messy repairs on my commercial property as well as building a handicapped ramp. Good general contractor with capable subs. Work is being done on schedule."
Concord, NH
Concord, NH
Concord, NH
Exterior Wall
Addition Ceiling

+12

Response time9 hrs
Response rate100%
Recommended by90%of homeowners
Showing 1-10 of 50
Insulation FAQs, answered by experts

These two types of foams are similar chemically, but they are applied in a much different way and each has its own pros and cons. Spray foam can only be used if the area where you will be installing the installation is wide open and easy to access. Injection foam should be used where it's cost-prohibitive to remove the walls that are placed over the insulation. Spray foam is a much less expensive process and requires less expertise. 

It’s best not to install a radiant barrier directly under insulation because it requires an air gap on at least one side to work properly. Instead, you should install the radiant barrier over your existing insulation to create an air space to reflect the radiant heat.

Yes, cold walls are a common indicator of poor or inadequate insulation, especially if the walls feel significantly colder than the air in the room. This suggests that heat from your furnace is escaping rather than being retained. The issue could be that the walls have no insulation, or that the existing insulation is old or has been damaged by water, moisture, or pests. Your best course of action is to hire a professional to investigate. An insulation contractor can determine if you need to add or replace insulation and can often perform the work without creating large holes in your drywall. If you suspect the problem might also be related to your heating system's performance, an HVAC technician can take a closer look.

The amount and type of insulation your home needs depends on your location, climate, and the specific installation area (attic, walls, or floors). Your local building code will typically determine the minimum required R-value. For specific recommendations, Energy Star suggests the following R-values: homes in the Southern U.S. should have R30 to R60 in attics and R13 to R25 in floors and walls; homes in moderate climates need R38 to R60 in attics and R25 to R30 in floors and walls; and homes in northern states require R49 to R60 in attics and R25 to R30 in floors and walls.

You do not need to drywall over most types of garage insulation. However, doing so can increase noise reduction, make the space more attractive, and keep children and pets from touching harmful fiberglass insulation. If you’re using cellulose or some other type of blown-in insulation (fiberglass and mineral wool are common), you will need drywall to contain the insulation material.

The Greenville, NH homeowners’ guide to insulation services

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