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TRUSTED BY ALTON, IL HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon17
    Verified insulation services reviews

Find Insulation pros in Alton

Avatar for West County Insulation
West County Insulation
5.0(
6
)

Serving Alton, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Small jobs welcome

"Why West County Insulation is the Best Choice for Your Insulation Needs When it comes to insulation, quality and professionalism matter—and that's exactly what I received from West County Insulation. Fast and Knowledgeable Service Brandon, who provided the initial quote, was timely, knowledgeable, and thorough. He explained all my options and made sure I understood everything clearly, giving me confidence in my decision. Professional and Efficient Installation The installation team, led by Andrew and Isaac, was efficient and professional. They used drop cloths to protect my home and completed the job quickly without sacrificing quality. The owner even took the time to check in after hearing about a fall I had during the job—demonstrating the company’s commitment to customer care. Great Quality at a Fair Price The insulation quality is excellent, and my home is already feeling more comfortable. With competitive pricing and outstanding service, West County Insulation offers great value for your investment. If you’re looking for reliable, professional insulation services, I highly recommend West County Insulation."
Response time1 day
20 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for St Louis Insulation
St Louis Insulation
4.9(
67
)

Serving Alton, IL and surrounding areas

In business since 2001

Free estimates

Credit card accepted

"Chris with St. Louis Insulation went above and beyond, he dispatched Brian out to inspect our insulation as we thought it was getting wet on the same day we called. Ultimately it was determined we did not have an issue. If an issue ever does come up we will be calling Chris with St. Louis Insulation. Thanks, Russ"
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+40

Recommended by98%of homeowners
Avatar for Triple B Pest insulation & services
Triple B Pest insulation & services
4.6(
11
)

Serving Alton, IL and surrounding areas

In business since 2022

Free estimates

Credit card accepted

"I’m a land lord of 72 residential properties and the biggest head ache other than common upkeep was the constant battle with roaches and insects inside the units, I had Triple B come out and put their pest control infused insulation at 10 of my properties and within 3 weeks the tenants were in shock at how affective it was, they went from seeing them everyday to hardly ever, I ended up getting them to do all my units and also my own house, this will be a must at any property I ever purchase, highly suggested for new home owners/buyers"
Pest infused insulation
Before removal
Before removal
After removal and sanitation
Insulation removal & sanitation

+1

Recommended by90%of homeowners
Peterson Energy Consultants
3.9(
67
)

Serving Alton, IL and surrounding areas

In business since 1978

"He was very knowledgeable and professional. After the audit we received an estimate to correct any areas that were discovered. Unlike what we originally thought our issues were not the windows and doors. The estimate was for $4000 to add insulation to the attic, increase airflow in the attic, install foam insulation around our fireplace and throughout the basement as well as removing the attic fan and adding drywall. 
The price is the estimated price for projects to be completed.
"
Recommended by80%of homeowners
Avatar for Siding Repair Systems
Siding Repair Systems
4.5(
128
)

Serving Alton, IL and surrounding areas

In business since 2009

Free estimates

Credit card accepted

"The fellows did a great job with this house.  The work is really quite excellent, and they kept us informed with how long it would take, how it was going, and could speak in understandable sentences.  They were polite and they worked very quickly.  
We were amazed and how quickly they did this job, as it was perfect and not at all sloppy, which you easily see in others who are quick and sloppy.  They were anything but.   They cut around several outlets and exterior items on the house and that was done well.  I would definitely recommend to anyone.  We also cannot believe how much WARMER THE BACK OF THE HOUSE is now - especially as it faces NORTH and was quite cold for the last 15 years.  We hope to be able to have them do the rest of the house as we like the insulation put in and the type and quality of siding that was used.  We would recommend most definitely."
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+6

Recommended by89%of homeowners
Avatar for Absolute Clean
Absolute Clean
4.6(
420
)

Serving Alton, IL and surrounding areas

In business since 2007

Emergency services offered

Credit card accepted

"My best friend's mother had been challenged with sickness for quite some time.  She had been complaining about mold in her house.  We had several people come out and do inspections.  Most of them were expensive.  We could not meet their requirements at the time.  We finally called Absolute Clean.  They came out and did a thorough inspection.  He actually found the mold problem that the other companies never mentioned.  He gave us a detailed description of how it would be removed.  We hired them for the job.  They did an excellent job.  They were completely knowledgable which made them able to do an exceeding job.  They came in and removed the mold.  They removed some paneling and drywall that had been previously missed by the other contractors.  They scrubbed the mold.  They chemically treated the mold problem.  They actually ozoned the whole premises to get rid of all of the mold.  They also found asbestos insulation that was missed by the previous companies we had to come out and look at the problem.  They removed the asbestos for us.  They worked around our time schedule which was a great help.  They were very courteous and polite.  I would recommend them highly."
Recommended by87%of homeowners
Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,688
)

Serving Alton, IL and surrounding areas

In business since 1971

Credit card accepted

"I love American Shield.  I love American Shield.  I love them. We have 2 homes; this home is 30 years old, our home in California is twenty years old and we have used them in both places.
A, number 1, plus, plus!"
Additional Photos
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+2

Recommended by65%of homeowners
Avatar for Dunn Home Improvements LLC
Dunn Home Improvements LLC
4.4(
79
)

Serving Alton, IL and surrounding areas

In business since 2012

Free estimates

Credit card accepted

Founded in Saint Louis & taking pride in meeting and exceeding the needs of our clients.\n\n \n\nDunn Home Improvements is a full-service contractor in St. Louis, Missouri structured on a foundation of hard work and strong work ethics. We credit our success of hiring forward-thinking innovators and experts which in turn meets the needs of our customers at a surprisingly reasonable cost. Whether it is updating a backsplash, new flooring, a full or partial bathroom renovation, updating your kitchen or a whole new kitchen, we look forward to helping you with all of your home improvement needs.\n\n \n\nIf you are in the market for a contractor in St. Louis and the outlying areas please contact us 314-397-2454 or [email protected].

Bathroom tile work
Kitchen
Bathroom Remodel/Tile
Bathroom Remodel
Shower Tile

+9

Recommended by87%of homeowners
Avatar for Addict Insulation, LLC
Addict Insulation, LLC
New to Angi

Serving Alton, IL and surrounding areas

In business since 2012

Free estimates

Small jobs welcome

Addict Insulation, LLC is a family-owned insulation contractor with 24 years of experience serving St. Charles, O'Fallon, and the greater St. Louis area. We specialize in providing high-quality, very affordable insulation solutions for both homeowners and businesses. Our professional insulation installers are experts in Blown-In Attic Insulation, Fiberglass Batting, and our specialty "Drill and Fill" technique—the perfect energy-efficient solution for insulating older homes without a full remodel. We also provide safe insulation removal including removing contaminated insulation and basement upgrades. If you're looking for a top-rated insulation contractor or supplier, call us today for a free estimate.

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Insulation questions, answered by experts

The life span of fiberglass insulation can be as long as 80 to 100 years, but because of changing building codes, it’s best to get your insulation checked every 10 to 15 years. Signs of degrading fiberglass insulation include bits of batts on the floor or batts detached from frames. Having optimal, healthy insulation in your home will improve its energy efficiency, lowering your monthly bills.

Insulation can be made of cellulose, fiberglass, polyurethane, polystyrene, or mineral wool. Radiant barriers are often made of aluminum or other similarly reflective materials, but they will need to be paired with something else because they don’t provide heating benefits. Cellulose is among the most eco-friendly options and may be recycled when it’s past its shelf-life, whereas polyurethane and polystyrene both emit harmful compounds and will need to be handled with care during installation.

It depends on your needs and preferences, though many homeowners think it is worth it. Not only is blown-in insulation easy to install, but it is highly efficient with thermal regulation. Most types are mold-resistant, flame-resistant, insect-resistant, and, most importantly, completely safe.

For standard 2x4 walls, the ideal insulation has an R-value between R-13 and R-15. This level of insulation, typically around 3.5 inches thick, fits well within the wall cavity. Common options include fiberglass batts and spray foam. The best choice for your home can depend on your climate; use R-value maps, like those from Energy Star, to determine the recommended level for your region. For colder climates, you might also consider adding exterior insulation for greater efficiency. Always check with your local building codes to ensure you meet any required standards.

Glass fibers are often used in HEPA filters because of their high efficiency, durability, and thermal stability. Some HEPA filters are made with synthetic fibers, but they may not be as effective. While there is some fiberglass shedding, as long as the HEPA filter is intact and not cut open, the amount of fiberglass released by a HEPA filter is well below the breathable particulate matter.

The Alton, IL homeowners’ guide to insulation services

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