Insulation service costs depend on your project and location. Check with a local pro for your specific job.
Installing attic insulation in Denver costs $0.50 to $7.50 per square foot.
The attic size and material type impact total costs the most, with batts being cost-effective while spray foam is more costly.
Plan for extra expenses due to air sealing needs, an inspection, an electrician, or a structural engineer.
Hiring an attic insulation pro in Denver, CO, provides reliable help with installing attic insulation and saves you time and effort.
Installing attic insulation in Denver, CO, costs an average of $2,222 and typically ranges from $1,799 to $2,645. With costs falling only slightly above the national average, it’s a worthwhile project to get done before the winter or summer weather sets in. Learn how to budget for the project based on your attic size, insulation type, add-on services, and more.
Find out how the major cost factors affect your attic insulation installation in Denver, CO, as well as details on the required R-value and recommended materials for the area.
The amount of insulation you need depends on the size of the attic and the desired insulation level or R-value. You’ll typically match the insulation coverage to the attic size, assuming you’re insulating the entire attic space. Here’s how much you can expect to pay for insulating different attic sizes:
| Attic Size (Square Feet) | Average Cost |
|---|---|
| 300 | $325–$950 |
| 500 | $525–$1,575 |
| 800 | $850–$2,550 |
| 1,000 | $1,050–$3,175 |
| 1,500 | $1,600–$4,750 |
In Denver, winter lows average 20 degrees Fahrenheit for three months, and only climb to 29 degrees Fahrenheit by March. And once the winter blues are over, the summer heat sets in, with average highs hitting the low 90s in July and August.
Because of the extreme swing in temperatures throughout the year, a properly insulated attic is vital to a well-heated or well-cooled home without straining your HVAC system. To ensure your insulation is up to code and up to par to battle the elements, your R-value must be at least R-38. For the best results, it’s recommended to get up to R-60.
To achieve the desired R-value, the insulation may need to be installed in multiple layers or in thicker batts or rolls. The more insulation material required to cover the attic space, the more it will contribute to the initial cost of finishing an attic.
The type of attic insulation you choose is among the most significant factors affecting cost. Each material has a different R-value, which makes it more or less effective in insulating the space. In Denver, the most commonly used insulation types are blown-in fiberglass or cellulose, spray foam, or fiberglass batts.
Here’s what you can expect to pay for different insulation materials.
| Attic Insulation Type | Average Cost Per Square Foot | Best Use |
|---|---|---|
| Batt | $2–$4.25 | DIY installation and standard-sized attics |
| Blown-In | $1–$4.25 | Filling irregular spaces and insulating existing attics |
| Loose Fill | $2–$5.25 | Large, open attic spaces and cooler climates |
| Reflective | $0.50–$2 | Hot climates or attics with limited insulation space |
| Rigid Board | $2–$5.25 | High R-value and reducing moisture |
| Spray Foam | $2–$5.25 | Sealing gaps and attics with complex shapes |
| Structural Insulated Panels | $4.25–$7.50 | Achieving strong insulation in new attics |
New insulation can sometimes be added right on top of old insulation, but only if the old insulation is still in good condition. If the old insulation isn't in great shape, then you'll need to pay someone to remove it or remove it yourself. Hiring an insulator to remove it typically costs $1 to $1.50 per square foot, so you'll want to factor that price into your project budget if needed.
Air sealing involves removing all of your attic's insulation to find and resolve any air leaks. This costs $275 to $800, and it’s an integral step in the installation process for bats and blown-in insulation. You can skip this step for spray foam, since the material expands and fills any holes and crevices, but for other materials, air sealing is required for the insulation to work properly.
An attic inspection costs $100 to $325 in Denver, with prices varying depending on the complexity and accessibility of the attic and the service provider.
Some insulation contractors may offer free attic inspections as a promotional or introductory offer, while others may charge a fee that can be applied toward the insulation project if you decide to hire them for the job.
Hiring an attic insulation pro in Denver, CO, costs $0.50 to $7.50 per square foot. DIYers may think about doing the job on their own, but it’s best to hire a pro who can complete the job safely according to local codes.
Permits aren’t required for attic insulation installation in Denver, although you may need one if you bring on an electrician or structural engineer.
If you’re in a historic home built before the 1940s, there’s a chance that you have knob and tube electrical wiring in the attic. If this is the case, you’ll need to bring in an electrician to remove or disconnect it to prevent fire hazards. In Denver, knob and tube wiring is often found in historic neighborhoods, including Capitol Hill, Baker, and Five Points. Expect to pay the electrician $55 to $110 per hour.
Another instance when you’ll need to bring on another pro is if you’re planning structural changes in the attic. Removing ceiling joists and load-bearing walls, for example, requires the help of a structural engineer. They charge $150 to $200 hourly.
Attic insulation installation can increase your home value by 2% to 6%, assuming that you also insulate your crawl spaces and basements, while ensuring proper air sealing. Installing insulation also has a high ROI of 117%, which makes it a great investment that will improve the quality of life in your home.
According to the EPA, homeowners can save significantly on monthly heating and cooling bills by installing insulation in their attics, floors, and crawl spaces.
To help homeowners plan their next project, Angi provides readers with carefully researched cost data and upholds strict editorial standards. We start with national average project costs, which we collect by analyzing competitor information, retailer material costs, and input from professional contractors. We then apply local price index data to calculate location-specific estimates that reflect what homeowners typically pay in their local area. To do that, we use data from the U.S. Bureau of Economic Analysis (BEA), including its Regional Price Parities (RPPs), which measure price differences across cities. This helps us account for differences in labor, materials, and overall cost of living, so estimates in higher- or lower-cost areas better reflect real-world local pricing.
Every estimate undergoes a thorough editorial review to verify accuracy, consistency, and alignment with observed market conditions.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
Home Performance Solutions gave me a bid for insulating an attached garage. Mike was incredibly knowledgeable and detailed. The bid and scope of work stood out from the rest. I was looking for a basic wall and ceiling bat insulation between the studs. He ended up recommending spray foam as...
Had a garage & shed insulated. Service was very professional & completed on time. The price for the service was outstanding, and I would recommend Shad & his crew to anyone. 5 out of 5 stars!
Irons in the Fire Spray FoamMy experience throughout was positive. Josh, who estimated and oversaw the project, was accessible for any questions and even reached out himself. He was an excellent, accessible, and knowledgeable communicator. He gave a written estimate, quite reasonable one (the best that I received),...
Insulation NationJason and his crew were very professional, clean, and polite. They were very patient with me and all my questions. They even went above and beyond when I had a misunderstanding about how things work. I highly recommend Advanced Insulation Services! Integrity, Character, Compassion, and...
Advanced Insulation Solutionsprompt on time service, great people to work with, I highly recommend them for insulation work
Thermal Home InsulationEnergy Armor Wow, these guys were great! Scheduled quickly, showed up on time and did a marvelous job with blown in insulation! They were pleasant, professional, cleaned up afterwards and the newly insulated attic was immediately apparent in the house! The house feels â buttoned upâ now,...
Energy Armor, LLCI was very pleased with the professionalism REenergize CO displayed. I would recommend this firm to anyone needing a quality insulation.
REenergizeCO, Inc.As a senior I felt very confused about the cost and selection of new flooring â Jack educated me on product selection, what the process of floor insulation involved. The skill at which Jack and his helper Logan installed my vinyl plank flooring was easily noted when I saw the finished...
From the on-site review and estimate process to the completion of the project, this has been one of the best contractor experiences we have had. Ryan (owner) personally came to estimate our project (attic and crawl-space insulation), was patient in addressing our questions and, within 24...
NetZero InsulationInsulation Pros of Colorado were outstanding. They were timely, did a great job, respected us and our home, and answered all our questions. Best yet they nearly cut our utility bill in half for Sept compared to that for July and August ... and this Sept hit all time high temps.
Insulation Pros of ColoradoFrom average costs to expert advice, get all the answers you need to get your job done.
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