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We at RetroGreen Energy are proud to serve Minnesota by enhancing home and building performance through superior insulation. As specialists in energy efficiency and indoor comfort, we work with residential, multi-family, agricultural, industrial, and commercial clients to address high utility costs, air quality concerns, and structural issues caused by poor insulation.

Our RetroFoam wall insulation offers unparalleled benefits by filling enclosed cavities effectively, without invasive demolition or expansion damage. Installed externally, it is safe, fire-resistant, biodegradable, and hypoallergenic, making it ideal for families. In attics, we employ advanced air sealing followed by cellulose insulation, delivering maximum energy efficiency and comfort. We use environmentally friendly spray foam technology for a safe, durable result. Our goal is to ensure your property remains efficient, healthy, and comfortable in every season.

Business details
  • Licensed
  • Insured
Highlights and features
  • BPI-certified energy audits in St. Cloud area
  • Comprehensive blower door air leakage testing
  • Infrared thermography reveals hidden heat loss
  • Room-by-room outdoor connection pressure analysis
  • Customized testing packages with detailed reports
  • Proven results backed by client testimonials
Payment methods
  • Cash
  • Debit cards
  • Credit cards
Services
Wall Insulation We specialize in RetroFoam wall insulation, a non-expanding injected foam designed to outperform traditional materials. Installed by our factory-trained team, the process requires only minor exterior access and no interior tear-out. This premium solution increases your homes energy efficiency, adds structural strength, and ensures long-lasting performance, keeping your family safe, comfortable, and protected for years to come.
Attic Insulation Our attic insulation service combines precision air sealing, upgraded ventilation, and high-performance materials to deliver superior results. Each project is handled by certified professionals who design the ideal thermal envelope for your home. We ensure your attic keeps conditioned air in, outdoor elements out, and contributes to a more efficient and comfortable living space.
Energy Audits We provide homeowners with professional energy audits that go beyond standard inspections. Through rigorous testingsuch as blower door assessments, thermographic imaging, and pressure mappingwe reveal hidden flaws affecting your homes thermal performance. Our findings are documented in easy-to-understand reports to support energy-saving improvements and validate prior efficiency upgrades.
Soundproofing We offer soundproofing solutions that effectively reduce noise and improve comfort in your building. Our team uses RetroFoam insulation, injected into cavities through minimal openings, to block sound and improve efficiency. The installation process is fast and non-invasive, preserving your property while delivering quiet, energy-efficient results you can enjoy for years.
Reviews (30)
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Theresa Frericks
Jun 02, 2025
The experience I had with Retro Green was awesome. I had a lot of questions about the process and they were very knowledgeable and patient. Thanks Drew and Don!! Great guys that came out to do the install and they cleaned up very well. I have noticed a difference already in my lake cabin. Thanks again Retro Green.
Michael Spence
May 16, 2025
Drew was very good to work with and the company worked with to get 3 homes done in one day since our jobs were 50miles from st cloud. They have a great product
Jason Lampel
May 01, 2025
These guys were great. Sales/quote was very thorough and informative, good communication and follow-through on rebate applications. As for install, the crew of 4 or 5 worked well together, showed up on time, answered my questions, knocked out my retrofoam install in 6 or 7 hours, did a respectable job cleaning up afterward, and I can't even tell which pieces of siding they removed.

Good work fellas!
L. K.
Apr 08, 2025
Great crew - great work! Professional and reliable from bid to finished job. I had a really rough start trying to find a local company that would show up to look and actually provide straight answers and a solid bid. It was overwhelming and stressful.
From the moment Retrogreen took my first phone call, the stress was gone. The crew was great, my house is finally cozy.
From their general expertise, to the excellent customer service and fantastic work, I cannot recommend this company enough.
Sandy Saline
Mar 21, 2025
Very pleased. The whole process was excellent. The crew was efficient and respectful of my property. The cleanup was far more than I expected. I recommend them without reservation!
Cheryl Allex
Mar 19, 2025
I was very impressed with their work. Everyone knew what their job was and worked great as a team. If I had a question, they explained to me what they were doing and how it was done. I was shown with the infrared camera how it looked before and after. They were done in no time. They all were very friendly and fun to talk with; a great bunch of guys. I'm very happy with their work. Thank you to a great crew.
Ashley Suchomel
Jan 02, 2025
We hired Retrogreen Energy to complete a retro installation of foam insulation in our existing walls. We have an old house with orignal newspaper insulation that was just not cutting it to keep us warm in MN winters.

The consultation and installation process went very smoothly. The company took care of the available rebate paperwork which was great

The crew completing the installation was very professional and communicated well with me throughout the day. It took just over half a day to complete the work from arrival to completed cleanup. We have cedar shakes as siding, and after the installation, we could hardly tell the work had been done.
Susan Wasson
Sep 28, 2024
The difference after having RetroGreen insulate our home was dramatic. We could tell the same day that we could hear less outside noise, and our heating requirements dropped significantly. Worth every penny!!!
Crystal Shirley
Sep 20, 2024
Tony and Lupe did a great job insulating my crawl space. Nice guys. I'm anxious to see the difference it will make this winter.
Elizabeth Carlson
Sep 05, 2024
From start to finish, the RetroGreen team was great to work with. Quality people, quality communication, and quality service with very little disruption to our 100 year old house.
Kara Newman
Jun 10, 2024
RetroGreen did a nice job insulating my attic with spray foam. Both the sales team and installation team were easy to work with. I would definitely hire them again.
Barbara Chirinos
Apr 24, 2024
Everyone associated with this project was professional and pleasant from the owner who provided the initial overview and quote to the crew who worked in the hottest weather of the summer to complete my project on time. It was a sizable investment in my 1949 home. I immediately noticed the reduction in outside noise and an improvement on what was a drastic difference in temperatures between main level and second story.
Steph Stenlund
Apr 01, 2024
Great experience! Nick and crew were professional and courteous. They arrived when promised, and promptly went to work! They cleaned up perfectly, to the point where it didnt even look like anyone had taken off siding, etc. I already notice the difference in less sound coming through the walls, and heat staying in. Thank you, to RetroGreen!
Kelly Tuttle
Feb 23, 2024
We had insulation installed in the ceiling of our loft space. Work had to be done from the inside. Everything was great! Good communication, good crew, timely, efficient, neat worksite, cleaned up at end. We've noticed an improvement already in the energy conservation upstairs. Highly recommend.
Sara Schmidt
Feb 09, 2024
RetroGreen Energy is amazing! They were incredibly efficient about setting up an appointment to give me an estimate and happily worked around my work schedule. They gave me a very clear and detailed estimate. The work they did was great, and everyone I dealt with was helpful and kind. Highly recommend!
Gene Berger
Feb 02, 2024
These guys did an absolutely fantastic job. From the initial visit all the way to post-install cleaning up, where every last crumb of foam from the installation was policed up. After it was installed, they spent the time to show me where it was installed and provided me with a way to download and access the FLIR images. The on-site foreman walked me through where everything was installed and explained that my house was pretty much empty when it came to insulation between the outside walls and the studs; there was literally no insulation whatsoever between the studswith the post FLIR Images I was able to see where the foam insulation was pumped in, basically, I went from zero to hero in regards to my overall R factor in my home. He also explained that I would most likely be able to feel the difference immediately. And believe it or not, I was immediately able to feel the difference. When I had the insulation installed, it was a sweltering day here in Minnesota, the following day was just as hot. However, my air conditioner definitely ran much less than the previous day, before the installation. I will be keeping a close eye on my heating and air conditioning bills moving forward just to see exactly how much money I save between the years without the insulation versus now.
Kit Johnson
Dec 28, 2023
Got my garage insulation project done quickly and did a great job - and I can tell the insulation is working well! I hear my heater running a lot less already, despite the weather the last few days. Great work!
Nathan Niblick
Nov 24, 2023
I couldnt be happier. By far the most knowledgeable and professional salesperson and installers of any that quoted me. I see why they have such a great reputation in the industry. I would 100% recommend them for any of your insulation needs.
Lisa Berg
Nov 18, 2023
Chris and the crew that insulated my attic were very knowledgeable, friendly and professional. They squeezed me in so I wouldn't have to be without insulation into the hot summer months and handled all the paperwork to get my energy rebates. It was a very seamless and easy process.
Kim Berndt
Jun 04, 2023
They did excellent work. They answered all my questions. I was surprised at how quickly the job was done. The crew that did the job were very professional. Our house was done in the beginning of January and I waited to leave a review so I could see how much money we are saving on our heating costs and I can say there has definitely been a savings there. I only regret not having this done sooner.
Northland Steam Cleaners
May 20, 2023
The team at Retro Green did a fantastic job on our house. They showed up when they said they would, left our place clean, were very responsive and professional. We would highly recommend!
Tom Eggleston
Apr 12, 2023
Super professional and very knowledgeable. The whole process was awesome from the quote to the job getting done. The crew even left the house cleaner then it was when the got here. Can already tell the difference in air quality and my home is much more comfortable already. Definitely would call these guys with future projects
Janel Weinkauf Yasgar
Mar 07, 2023
We are very happy that Retro Green was able to help us with our Insulation in our Roof/attic and our exterior walls.
Having an older home, things were not as they should have been. Lack of insulation as well as lack of venting in the attic caused many issues. Having very little insulation in the walls as well, made for a cold house in the winter and hot in the summer!! The furnace and fireplace seemed to never shut off and the AC was the same!!
I highly recommend them as they are very easy to work with and the guys that do the work are very professional. Any question I had, they answered without any hesitation. They know their stuff!!
We are excited to see our propane bill be lower this year!!
Jed Uhlenkamp
Feb 21, 2023
We hired RetroGreen Energy to help us come up with a sound proofing plan for a spin studio in a busy office complex. We executed the plan and the final results were better than we anticipated. We have zero transfer of sound out of the workout rooms, even when the stereo system is turned all the way up. We will defiantly be using RetroGeen Energy again in the future! Thank you for your great work.
William Orr
Jan 30, 2023
This comes just a few days after the work was done, but very happy with the Work RetroGreen did for us. They took out all the old insulation, and foam sealed where it needed, and then blew in new insualtion. They also took care of a couple other little issues that needed repair. They said we gained about 30% efficiency, which they said was good. It's summer now, so we will see how well it works in the future, but for now, i'm very pleased with the work done.
Kelly Longtin
Jan 27, 2023
They installed foam insulation in our walls. Did an excellent job. Did the whole project in 1.5 days on the day they said they were going to do it and on budget. All employees were extremely considerate and answered any questions we had. Would recommend this company to anyone. Great job. Kelly
Joel Johnson
May 08, 2022
Due to a cancellation I was able to get the install months before scheduled. The crew was fast, efficient and swore like sailors. The insulation effect was noticeable the first day with the main floor not as cold and the floor didn't have the usual cold spots.
Communication on what the job entailed and when it was to begin was well communicated before install day.
Michael Morton
Dec 04, 2021
Great job, from initial contact, thru energy audit, quote, and install. Every question I had was answered and explained. Paul and crew were on time, courteous, and did an awesome job! We had a few "problem areas", and they were taken care of on the same day. House is noticably quieter and temps inside are more even. Haven't had to run the furnace since they were here, but the AC definitely doesn't run as much as before! Now, can't wait to see how the house does this winter! Chris, Ruth, Drew, Paul and crew, thank you for a job well done!
Mike & Edee Conner
Nov 10, 2021
The crew led by Paul was on time and extremely responsive to my questions and concerns. The work they did, taking out the old attic insulation and replacing it with foam and blown in insulation was amazing. I am completely impressed by their workmanship and professionalism. My wife was excited with the cleanliness of the project. We would have to say JOB WELL DONE.
Annette Mills
Mar 22, 2020
We contacted Home Advisors who gave us 3 companies to contact for adding insulation to our home. RetroGreen had their "act" together and after doing an energy audit of our house, Paul pointed out the areas where we were lacking sufficient insulation and air leaks. Sam came and took the measurements and gave us a quote. We had to wait longer than we liked to have the work done but have found out that the busy contractors are usually the ones that do the best job. Cody brought the crew in yesterday (half hour earlier than we were told). They went right to work and vacuumed out the old insulation and sealed the areas that leaked, built boxes around fixtures that stuck up into attic. and made a frame around ladder going into attic. Then they sprayed R-60 cellulose insulation into attic, making sure the ventilation needed was there. They cleaned the work area up including the ladder. I highly recommend RetroGreenEnergy