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TRUSTED BY ALTON, NH HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon25
    Verified insulation services reviews

Find Insulation pros in Alton

Avatar for ABI LLC
ABI LLC
5.0(
5
)

Serving Alton, 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
33 neighbors recently requested a quote
Avatar for N.E.E. Construction & Spray Foam
N.E.E. Construction & Spray Foam
4.1(
46
)

Serving Alton, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Warranties offered

"The work that was done installing spray foam underneath my four season room was fantastic! The owner and worker were absolutely fantastic. Great quality workmanship and very reasonably priced! I will definitely call this company for future work! Very professional, friendly, and clean. No messes were left behind. I already referred this company to friends."
Sub-Floor Basement
Basement Sub-Floor & Rim Joist
Rim Joist & Sub-Floor
Blown Insulation
Deck Build

+16

Response time2 days
13 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Jared Sims Building & Remodeling
Jared Sims Building & Remodeling
5.0(
3
)

Serving Alton, NH and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

We take great pride in offering the best possible experience with our expertise, quality, and customer service. In order to understand the needs and expectations of our clients; we take great care to work and communicate with everyone in a professional manner. It is our mission to exceed our clients expectations by providing excellent workman ship and complete customer satisfaction, from the start of each project to its completion. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

60’x40’ Metal Building
60’x40’ Metal Building
60’x40’ Metal Building
60’x40’ Metal Building
60’x40’ Metal Building

+5

Sonart Construction Corp.
2.3(
7
)

Serving Alton, 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

Serving Alton, 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.

5 neighbors recently requested a quote
Showing 1-10 of 45
Insulation questions, answered by experts

Buying a house with vermiculite insulation is not recommended without going through a proper testing process. Vermiculite insulation can potentially contain asbestos, which poses health risks when disturbed. While it is possible to purchase a home with vermiculite insulation, you should have it tested for asbestos, and ensure proper containment if asbestos is present. If asbestos is present, you will want to hire a professional to remove it, ideally before you move in.

When doing any type of project involving mold, it's important to wear the right protective gear. You'll want an N-95 or KN-95 mask to keep yourself from inhaling mold spores, which can be irritating or trigger an allergic reaction in people with weakened immune systems. You'll also want to wear protective eyewear and gloves to limit your contact with mold.

The most affordable way to insulate behind unfinished walls is to install fiberglass batts or rolls. These total around $0.75 per linear foot, with the width matching the gaps between standard studs perfectly. However, it’s important to consider the R-value of your insulation and the climate in your area, as fiberglass insulation isn’t the best in terms of preventing heat transfer. Plus, the most affordable option may cost more on electricity bills over time. The most affordable way to insulate behind finished walls is to leave them up and use blown-in insulation to avoid drywall replacement.

In some areas, insulation companies require a special license, while some states only require them to hold general contractor licenses. Some municipalities may not mandate any license, although you should always ensure a contractor is fully insured. You can use Angi’s license lookup tool to confirm whether or not an insulation contractor you’re considering holds the necessary license for your area. You can also contact the company for information regarding licenses, certifications, and insurance.

Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation: 

  • If the insulation is over 15 years old

  • If the insulation is wet or moldy

  • If it is vermiculite insulation

  • If you see signs of pest infestation

Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.

The Alton, NH homeowners’ guide to insulation services

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