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TRUSTED BY MONTICELLO, IL HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon11
    Verified insulation services reviews

Verified Reviews for Insulation Service pros in Monticello, IL

*The Angi rating for Insulation Service companies in Monticello, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.

*The HomeAdvisor rating for Insulation Service companies in Monticello, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.

Last update on March 15, 2026

Find Insulation pros in Monticello

Avatar for Slagel Insulation, Inc.
Slagel Insulation, Inc.
4.9(
8
)

Serving Monticello, IL and surrounding areas

Approved

In business since 1975

Free estimates

Offers commercial services

"This company did a great job of insulating my pole barn. I would highly recommend them."
Pole barn
Pole barn
Pole barn
Pole barn
Before

+13

Response time1 day
3 neighbors recently requested a quote
Recommended by100%of homeowners
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Avatar for Horn Insultation
Horn Insultation
5.0(
2
)

Serving Monticello, IL and surrounding areas

Approved

In business since 1992

Free estimates

Credit card accepted

"Horn Insulation did a tremendous job insulating our house. The quality of their work was great and they were a pleasure to work with. I highly recommend them!"
17 neighbors recently requested a quote
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Assured Insulation Decatur, LLC
5.0(
1
)

Serving Monticello, IL and surrounding areas

Approved

In business since 2014

Free estimates

Customers say: Quick response

We are a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 10 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

Response time1 day
Response rate92%
Recommended by100%of homeowners
Request Quote
Avatar for Olmsted Brothers Insulation, Inc.
Olmsted Brothers Insulation, Inc.
5.0(
11
)

Serving Monticello, IL and surrounding areas

In business since 2001

Free estimates

Warranties offered

"Kyle is a professional in all aspects, timely phone calls, getting back to me, and very polite. I reached out to Olmsted Brothers for an insulation quote and he got it back to me right away. I am not ready to proceed right away due to other reasons, but am looking forward to working with Olmsted Brothers in the near future."
Closed Cell foam
Closed Cell foam
Closed cell foam
Closed cell foam
foam and cellulose.

+20

Response time1 day
Recommended by100%of homeowners
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Advanced Foam Insulation
5.0(
5
)

Serving Monticello, IL and surrounding areas

In business since 2013

Free estimates

Offers commercial services

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade, combined with ability, is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business. Call us today!

Closed cell on Morton building
Closed cell on walls
Spray foam
Outside of metal building
Spray foam

+3

Response time2 days
Recommended by100%of homeowners
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Avatar for Insulation Service
Insulation Service
5.0(
2
)

Serving Monticello, IL and surrounding areas

In business since 1974

Free estimates

Offers commercial services

With over 30 years of experience in the Insulation industry, we are the experts you need to take care of your home or business. We handle everything from insulation to waterproofing. We will treat your home as we would treat our own. Give Insulation Service, a call today, we look forward to working with you!

Response time4 days
Recommended by100%of homeowners
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Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,688
)

Serving Monticello, IL 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
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Showing 1-10 of 17
Insulation questions, answered by experts

In addition to adding insulation to your attic, you may want to add a radiant barrier. A radiant barrier works by using reflective material, such as foil, on the attic floor. As heat penetrates the roof and enters the attic, the radiant barrier reflects the heat upward and back through the roof. If you receive a lot of direct sunlight on the roof, using both a radiant barrier and insulation in your attic can provide significant benefits.

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.

A vapor barrier can last over 20 years, but they are vulnerable to pests, flooding, and other natural disasters. If your home weathers a storm or is treated for any pest infestation, make sure to have a drywall pro come check the integrity of your vapor barrier. It’s also important to have a pro install a vapor barrier since improper installation can lead to tears or leaks in the barrier that shorten its lifespan.

Doubling the insulation in your home also doubles the R-value of said insulation. In other words, by adding more insulation, you can reduce the heat loss by half. Most homes benefit from increasing insulation. Older homes, in particular tend to have less insulation as is, so doubling your insulation could drastically reduce your energy bills, keep your home more comfortable, and take the strain off your HVAC system.

Insulating an unheated garage can still be worth it. For instance, insulating an attached garage can help with heat loss from your house in general, and it can also make it easier to store electronics in your garage without worrying about them being exposed to extreme temperatures.

If you use your detached garage as a workspace, insulation can still make a difference. Plus, you can use space heaters and a window unit AC to help condition the space while you work without installing heating.

The Monticello, IL homeowners’ guide to insulation services

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

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