Get matched with top insulation pros in Boulder, CO

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4.6

(153 reviews)

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Avatar for Insulation Nation
Insulation Nation
4.8(
10
)

Serving Boulder, CO and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

"We were very impressed with Insulation Nation’s professionalism, promptness, cleanliness and the incredible results we have experienced from the job they did in our attic. They made the process very easy at a reasonable price and we would strongly recommend them!"
Filled all exterior walls with dense pack cellulose insulation
Installed radiant barrier throughout entire attic above garage.
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+1

1 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for NetZero Insulation
NetZero Insulation
5.0(
15
)

Serving Boulder, CO and surrounding areas

Free estimates

Credit card accepted

"I had 1700 sf of attic space insulated and air sealed in a two attic, tri-level house. Ryan was absolutely awesome. He was very knowledgeable and answered everyone of my questions...I had a lot. They showed up early to every appointment. Once the job was completed, they did an awesome job cleaning up and vacuuming with their HEPA vacuum. I would highly, highly recommend these guys. They also filled out the Xcel rebates for me and subtracted from my bill. AND, they did a blower door test to validate the air leakiness of my house. They were able to reduce my leakiness by 52%!!! The next day, I could feel the difference already!"
Recommended by100%of homeowners
Avatar for JE Mountain Insulation LLC.
JE Mountain Insulation LLC.
5.0(
13
)

Serving Boulder, CO and surrounding areas

In business since 2006

Free estimates

Emergency services offered

"Excellent. The JE Mountain team was professional, timely, and did great work on the timeline they promised. Then cleaned up after themselves. They did both spray and batt insulation for me and I recommend them without reservation. They’ll definitely be my first call for my next project."
Insulation Project
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+10

Recommended by100%of homeowners
Avatar for Guardian Home Energy
Guardian Home Energy
5.0(
10
)

Serving Boulder, CO and surrounding areas

In business since 2013

Free estimates

Warranties offered

"Guardian Insulation was great to work with. Everything was explained in depth and choices broken down with plenty of info. We already feel a difference and notice that our furnace isn't running as often, even though we are in a cold spell. They cleaned up too. Would highly recommend!"
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Recommended by100%of homeowners
MONTGOMERY INSULATION
5.0(
5
)

Serving Boulder, CO and surrounding areas

In business since 1995

Free estimates

Emergency services offered

"I spent about $2100. They were incredibly thorough, very conscientious of trying to keep things clean and keep dust and things down in my home with the work that they did. My son's bedroom hardly had any insulation over it when the house was built and the worker made a suggestion to me to make the insulation adequate. They went in and sprayed the insulation through the garage roof and immediately there is a change in the temperature in my son's room in cold weather. They also did some work in my crawlspace and they did a good job there as well too. They were very reasonably priced compared to other companies. He gave me a 5%  discount because I was apart of Angie's List. "
Recommended by100%of homeowners
Avatar for Air duct international
Air duct international
4.8(
26
)

Serving Boulder, CO and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"Amazing service from start to finish I love the customer service they provide great Conversation that was very professional they show me pictures before enough though offer me a wall and thre Conversation that was very professional they show me a before and after pictures of my ducts and attic my dryer was completely clogged and they was able to get everything out , my house used to get so hot becouse of my low insulation and now I can really feel the difrence it's much cooler and feel great . And the best thing Thst make me feel very comfortable with them that they left me a 5 year warranty for everything they performed , highly recommended!"
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Recommended by96%of homeowners
Avatar for Hometown National
Hometown National
5.0(
151
)

Serving Boulder, CO and surrounding areas

In business since 2018

Free estimates

Emergency services offered

"After we returned home from our summer vacation out of town, we found that our master bath and bedroom had flooded due to rain and clogged plumbing. When I called the chief executor of Hometown Restoration, he replied quickly, provided a reasonable quotation, and started work straight away. We were delighted with the accuracy of the treatment of water, as well as the quickness through which his workers restored our master suite after insulation removal, flood cutting, and so on. Our home looked nicer than the original! Staff were professional, kind, and meticulous in their clean-up. I would refer Hometown Restoration to others!"
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+3

Recommended by100%of homeowners
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FAQs for insulation service projects in Boulder, CO

When choosing a professional insulation installer, consider asking these questions to determine the best fit.

  • Will you address air leaks in my house?

  • Can you provide an R-value (heat resistance) fact sheet?

  • What kind of insulation will work best for my home?

  • How do you handle signs of a water leak?

  • Are you licensed and insured?

  • Can you provide customer references?

The best type of insulation for your home depends on what you need, so the answer will depend on your specific situation. If you’re building a house, structural panels are easy to install during the building process in addition to being the most energy efficient type. If you live in a warm climate, reflective insulation may benefit you more as it costs less than other insulation types. And for standard attics, loose-fill, spray foam, or blown-in insulation work well.

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.

In some cases, you may not have enough insulation to properly regulate your home’s temperature. Watch for a few signs your home needs more insulation, such as:

  • High heating and cooling bills

  • Uncomfortable room temperatures 

  • Ice dams on the edge of your roof 

  • Roof leaks

  • Cold floors and walls

  • Freezing pipes

  • Temperature fluctuations

  • Visibly low insulation

  • Noise problems

  • Pest problems

On average, insulating an attic costs about $2,500, ranging from $1,500 to $3,500, depending on the insulation type, amount, and your attic’s accessibility. Additional cost factors include sealing air leaks, removal or replacement of insulation, and inspections. Types of insulation include:

  • Blown-in: $1–$4 per square foot

  • Spray foam: $2–$5 per square foot

  • Batt: $2–$4 per square foot

  • Structural insulated panels: $4–$7 per square foot

  • Loose-fill: $2–$5 per square foot

  • Reflective: $0.50–$1.50 per square foot

The Boulder, CO homeowners’ guide to insulation services

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