How do I add insulation to existing walls?

• <div><p>If you need to insulate behind finished walls, the best option will likely be to have an insulation professional install <a href="https://www.angi.com/articles/blown-in-insulation.htm">blown-in insulation</a>. The installation requires small holes cut in your wall, after which the installer can blow loose-fill insulation into the void. After the installation, you’ll have minor drywall patching, which shouldn’t cost more than <b>$100</b>. Compared to ripping down the existing drywall, using a different type of insulation, and replacing and finishing the drywall, this should save you hundreds or even thousands, depending on the size of the room you’re insulating.</p></div>

Get matched with top insulation pros in Spearfish, SD

Q: Where is insulation most important in a house?

• <div><p>You&rsquo;ve likely heard the saying &ldquo;heat rises&rdquo;&mdash;well, it&rsquo;s true! This is why it is critical to properly insulate your attic and protect yourself from chilly winter nights. During summer, your attic insulation will also protect against excessive heat gain radiating through the ceiling into the rest of your home below.</p></div>

Q: What materials are best for different climates?

• <div><p>Durable materials suited for climate include aluminum for coastal areas or composite wood in varying environments for durability and minimal upkeep.</p></div>

Q: How much can I save with insulated ducts?

• <div><p>Opting for insulated ducts can lead to significant long-term savings on your energy bills and contribute to a more efficient HVAC system. The precise amount you can save depends on various factors, including your climate, usage patterns, and the insulation's quality. However, on average, insulated ducts can result in savings of up to 20% on your annual heating and cooling costs, according to <a href="https://www.energystar.gov/saveathome/heating_cooling/duct_sealing/benefits">ENERGY STAR&reg;</a>.</p></div>

Q: How long does pipe insulation last?

• <div><p>The lifespan of insulation depends on the material type. Fiberglass can last between 80 and 100 years, but it is important to start checking it around the 15-year mark. Spray foam has a lifespan of up to 100 years, and mineral wool can last up to 100 years. Cellulose, an eco-friendly option, has a lifespan of 20 to 30 years.</p></div>

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Verified Reviews for Insulation Service pros in Spearfish, SD

*The Angi rating for Insulation Service companies in Spearfish, SD 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 Spearfish, SD 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 17, 2026

Reviewed in March 2026
TJ was very thorough in his explanation of the project and giving us our options. The installation of the spray foam exceeded our expectations. He worked around our remodel and is willing to come back in phases as we complete a room and shuffle our belongings. We appreciate the communication,...
Walking 4, LLC
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Reviewed in March 2026
Fantastic experience, not only did they check out my water heater the same morning I call, they also had it replaced by early afternoon. I couldn’t be happier. Very friendly service and extremely professional!!
Loyal Plumbing Heating and Cooling
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Reviewed in October 2025
Nexus pro did an awesome job on my pool deck. Added features for ease of cleaning. Nexus has great attention to the details and quality is important.
Nexus Variety Services LLC
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Reviewed in April 2025
We had doors put in our vacation home last month and we couldn't be more pleased with our salesman and the crew that installed them. Everyone is very professional, and we highly recommend them.
Renewal by Andersen of Rapid City
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Reviewed in March 2024
Steadfast Construction does top quality work and communicates very well throughout the projects.
Stead Fast Construction
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Reviewed in September 2023
Heating a cooling system cleaned Hard working, very understanding and kind.
Black Hills Dust N Clean
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Reviewed in February 2023
Jasper & Richard showed up on time, performed the job as needed, were very professional. They made a couple of recommendations based on observations made during the installation of new insulation. Not at all pushy, very friendly and respectful. Cleaned up well after completing there work. Would...
Koala Insulation
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Reviewed in January 2023
I was happy overall. Timing was touch due to being in the middle of winter. I've had them do two houses and a couple of garage, and everything's been really good. I've also had them do doors, windows. and siding. I'd use them again.
Roofing Plus Construction, LLC
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Reviewed in October 2022
I was concerned because my home already had blown-in insulation, though not adequate. They worked with it and moved it around then filled in the corners and edges with spray foam. My home is a lot more comfortable and holds a much more stable temperature throughout. The utility bill is already...
Advanced Poly Coatings & Liners
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Reviewed in January 2022
They don't have the window manufactured until the month of March so it was not installed yet. It is custom built, so I still need to wait until March for the window to be made then after that I still need to wait to get it installed which is probably on May. They don't seem to communicate with...
Your Home Improvement Company, LLC
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Find Insulation pros in Spearfish

American Home Shield – Home Warranty

3.5(

5,688

)

Serving Spearfish, SD 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."

Recommended by65%of homeowners

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Hampton Enterprise LLC

3.7(

)

Serving Spearfish, SD and surrounding areas

In business since 1989

Free estimates

Emergency services offered

Our mission at Hampton Enterprise LLC is to provide clients with superior customer service, quality work and speedy service in all aspects of their home improvement needs. Licensed, insured and trusted since 1989; come discover the Hampton difference today!\n\nWe specialize in the installation and repair of Windows, Doors, Flooring, Sinks, Bathtubs, Showers, Sprinkler Systems and much more. We also offer Interior and Exterior Home Painting, Custom Welding Fabrication and Carpentry.Localy in your area just call and i will call back with a local number thank you . from James Hampton\n\nAL.Dothan 334-648-3817,\nAL Birmingham 334-648-3817,\nAL Huntsville 334-648-3817,\nAL Mobile 334-648-3817,\nAL Tuscaloosa 334-648-3817,\nAL Montgomery 334-578-4761,\nAR Little Rock 334-648-3817,\nAZ Phoenix 334-648-3817,\nCA LosAngeles/Sacramento 334-648-3817,\nCO Denver/Colorado Springs 334-648-3817,\nCT Hartford 334-648-3817,\nDE Dover 334-648-3817,\nFL Tallahassee 334-648-3817,\nFL Cape Canaveral/ Cocoa 334-648-3817,\nFL. Destin 334-648-3817,\nFL Gainsville 334-648-3817\nFl Jacksonville 334-648-3817,\nFL Orlando 334-648-3817,\nFL Panama City 334-648-3817,\nFL Tampa 334-648-3817,\nFL Miami 334-648-3817,\nGA Atlanta 334-648-3817,\nGA Albany 334-648-3817,\nGA Augusta 334-648-3817,\nGA Columbus 334-648-3817,\nGA Macon 334-648-3817,\nGA Valdosta 334-648-3817,\nIA Des Moines 334-648-3817,\nID Boise 334-648-3817,\nIL Chicago/Springfield 334-648-3817,\nIN Indianapolis 334-648-3817,\nKS Levenworth/Topeka 334-648-3817,\nKY Frankfort 334-648-3817,\nLA New orleans/Baton Rouge 334-648-3817,\nMA Boston 334-648-3817,\nMD Annapolis 334-648-3817,\nME Augusta 334-648-3817,\nMI Detroit/Lansing 334-648-3817,\nMN Saint Paul 334-648-3817,\nMO kansas City/Jefferson City 334-648-3817,\nMS Jackson 334-648-3817,\nMS Biloxi 334-648-3817,\nMS Gulf Port 334-648-3817,\nMT helena 334-648-3817,\nNC Raleigh 334-648-3817,\nND Bismark 334-648-3817,\nNE Lincoln 334-648-3817, \nNJ Trenton 334-648-3817,\nNM Santa Fe 334-648-3817,\nNV Carson City 334-648-3817,\nNV Las Vegas 334-648-3817\nNY Albany 334-648-3817,\nOH Columbus 334-648-3817,\nOK Oklahoma Ciy 334-648-3817,\nOR Salem 334-648-3817,\nPA harrisburg 334-648-3817,\nRI Providence 334-648-3817,\nSC Columbia 334-648-3817,\nSD Pierre 334-648-3817,\nTN nashville 334-648-3817,\nTX Austin 334-648-3817,\nUT Salt Lake City 334-648-3817,\nVA Richmond 334-648-3817,\nVT montpelier 334-648-3817,\nWI Madison 334-648-3817,\nWV Charleston 334-648-3817,\nWY Cheyenne 334-648-3817

Recommended by60%of homeowners

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Insulation questions, answered by experts

If you need to insulate behind finished walls, the best option will likely be to have an insulation professional install blown-in insulation. The installation requires small holes cut in your wall, after which the installer can blow loose-fill insulation into the void. After the installation, you’ll have minor drywall patching, which shouldn’t cost more than $100. Compared to ripping down the existing drywall, using a different type of insulation, and replacing and finishing the drywall, this should save you hundreds or even thousands, depending on the size of the room you’re insulating.

You’ve likely heard the saying “heat rises”—well, it’s true! This is why it is critical to properly insulate your attic and protect yourself from chilly winter nights. During summer, your attic insulation will also protect against excessive heat gain radiating through the ceiling into the rest of your home below.

Durable materials suited for climate include aluminum for coastal areas or composite wood in varying environments for durability and minimal upkeep.

Opting for insulated ducts can lead to significant long-term savings on your energy bills and contribute to a more efficient HVAC system. The precise amount you can save depends on various factors, including your climate, usage patterns, and the insulation's quality. However, on average, insulated ducts can result in savings of up to 20% on your annual heating and cooling costs, according to ENERGY STAR®.

The lifespan of insulation depends on the material type. Fiberglass can last between 80 and 100 years, but it is important to start checking it around the 15-year mark. Spray foam has a lifespan of up to 100 years, and mineral wool can last up to 100 years. Cellulose, an eco-friendly option, has a lifespan of 20 to 30 years.

The Spearfish, SD homeowners’ guide to insulation services

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

See all articles

Mitchell Grant
•
May 30, 2026May 30, 2026
How Much Does Crawl Space Insulation Cost? [2026 Data]
Crawl space insulation costs vary by size, insulation type, and material. Read this guide to learn how much your crawl space insulation could cost.
Deane Biermeier
•
May 3, 2026May 3, 2026
How Much Does Ceiling Insulation Cost? [2026 Data]
Your home's ceiling insulation cost will depend on several factors, including the project size, the type of insulation you use, and the R-value.
Dan Simms
•
Mar 6, 2026Mar 6, 2026
How Much Does Pipe Insulation Cost? [2026 Data]
Find out the average pipe insulation cost, including material and labor prices, plus tips to save money on your project.
Timothy Moore
•
May 3, 2026May 3, 2026
How Much Does Insulation Save on Energy Bills?
How much does insulation save on energy bills? It depends on where you live and the type of insulation you install.
C.E. Larusso
•
May 3, 2026May 3, 2026
How Long Does Insulation Last? A Comprehensive Guide to Replacing Your Home's Insulation
If your home’s temperature is uncomfortable or your energy bill is spiking, you should check your insulation. We'll help you find out if you should replace it.
Mariel Loveland
•
May 22, 2026May 22, 2026
4 Insulation Health Hazards and How to Prevent Them
It may keep your home warm and toasty, but is insulation dangerous? Learn four potential insulation health hazards, and how to prevent them from occurring.