
At RetroGreen Energy, we help Minnesota property owners achieve comfort and efficiency through expert insulation services. We specialize in residential, multi-unit, agricultural, industrial, and commercial projects, applying proven building science principles to improve indoor air quality, reduce energy expenses, and eliminate common issues like mold, moisture, and ice dams.
Our wall insulation uses RetroFoam injection foam, a high-performance material that fills cavities completely without expanding or causing damage. This hypoallergenic, fire-resistant, and eco-friendly product is injected from outside the home, eliminating the need to tear down walls. For attics, we combine professional air sealing with premium cellulose insulation to achieve exceptional thermal performance. Our spray foam technology is among the safest and most environmentally conscious on the market. Through these tailored solutions, we ensure year-round comfort and significant energy savings.
Our wall insulation uses RetroFoam injection foam, a high-performance material that fills cavities completely without expanding or causing damage. This hypoallergenic, fire-resistant, and eco-friendly product is injected from outside the home, eliminating the need to tear down walls. For attics, we combine professional air sealing with premium cellulose insulation to achieve exceptional thermal performance. Our spray foam technology is among the safest and most environmentally conscious on the market. Through these tailored solutions, we ensure year-round comfort and significant energy savings.
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




Reviews (30)
Kirk Kandler
Jun 09, 2025
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Highly recommend RetroGreen for quality of communication, timeliness, professionalism, and cleanliness.
They told us exactly which 2 days they would be at our place, brought a large crew those 2 days, and blew foam into our attic, walls, and crawl space. They were exceedingly polite, and cleaned up very very well afterwards.
Both days were rainy and muddy, so the hoses dragged mud inside, but they had dropped plastic and cardboard throughout the interior. Even covered appliances. With all the mud and rain, we expected to come out to quite a mess, but they cleaned and wiped every surface.
The a/c is running 1/2 as often to cool the house as prior to installation, so work was obviously effective as well.
Quality work by quality people
They told us exactly which 2 days they would be at our place, brought a large crew those 2 days, and blew foam into our attic, walls, and crawl space. They were exceedingly polite, and cleaned up very very well afterwards.
Both days were rainy and muddy, so the hoses dragged mud inside, but they had dropped plastic and cardboard throughout the interior. Even covered appliances. With all the mud and rain, we expected to come out to quite a mess, but they cleaned and wiped every surface.
The a/c is running 1/2 as often to cool the house as prior to installation, so work was obviously effective as well.
Quality work by quality people
Theresa Frericks
Jun 02, 2025
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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 Hill
Jun 01, 2025
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Eric Falk
May 17, 2025
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Highly, highly recommend! From the thorough assessment of needs, to the clear estimation (broken into priority levels), to the exacting completion of the job, to the positivity, friendliness, and cleanliness of the work crew, to the completed project we have been extremely pleased! Already notice a difference particularly in the upstairs but also throughout the house. Excellent experience!
Michael Spence
May 16, 2025
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Cheryl Allex
Mar 19, 2025
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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.
Kristin Houle
Feb 25, 2025
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Laurie Yahn
Jan 03, 2025
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Ashley Suchomel
Jan 02, 2025
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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.
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.
Steve Modica
Dec 08, 2024
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Retrogreen insulated my older cabin. They were really fast, they made sure the foam didn't get inside and make a mess, and they cleaned everything up when done. I was very impressed. Special thanks to Nick, Nate, Scott and Lupe. Also, the foam seemed to make a difference right away. The place stays warmer when its cold out.
Rick Heyne
Nov 09, 2024
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Nick Dunning
Oct 31, 2024
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Cole Mayer
Oct 03, 2024
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Susan Wasson
Sep 28, 2024
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Elizabeth Carlson
Sep 05, 2024
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John Botts
Aug 24, 2024
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Craig Burlingame
Jun 23, 2024
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The guys showed up almost a month early (thank you Minnesota winter) at the appointment time and were ready to work within a short time. Very professional crew. Explained everything, didn't;t mind me watching over their shoulder, and when they left you couldn't't tell they had even been here. Now to wait and see what the difference in sound and heating/cooling bills will be.
Scott Hemink
Jun 09, 2024
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Great experience and extremely professional crew! They insulated the attic spaces in our 1 1/2 story house. This reduced our air leakage by 38% Seriously! Executed a combination of foams and blown fill exactly as planned, arrived and completed on schedule, and kept everything extremely clean! Even sent me pictures of the final installation for my records! I wish all my contractors were this professional!
Barbara Chirinos
Apr 24, 2024
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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.
Gene Berger
Feb 02, 2024
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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.
Joe Metzger
Dec 10, 2023
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Nathan Niblick
Nov 24, 2023
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Northland Steam Cleaners
May 20, 2023
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Dustin Antoine
Jan 01, 2023
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RetroGreen Energy was a great experience from start to finish. It was clear from the start they were honest about what services and scope of insulation would be beneficial for our home, and more importantly what wouldnt be necessary to do. Great people from Chris, to customer service, to the entire crew. Great experience overall!
Dan Grzywinski
Dec 10, 2022
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The entire process from start to finish was exceptional. The Retrogreen team that worked on removing and installing the insulation did a fantastic job. There was a bonus too! I should have installed an exhaust fan in the bathroom before their arrival
which didnt happen. They suggested having me purchase a fan and they would install it for me. This made the total project solid.
Their advertising sign is still standing proudly in my front yard. Great job men. Cheers!
which didnt happen. They suggested having me purchase a fan and they would install it for me. This made the total project solid.
Their advertising sign is still standing proudly in my front yard. Great job men. Cheers!
Joel Johnson
May 08, 2022
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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.
Communication on what the job entailed and when it was to begin was well communicated before install day.
Mike Wegner
Nov 18, 2021
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Mike & Edee Conner
Nov 10, 2021
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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.
Kathy Kamrud
Jun 19, 2017
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Sam gave a great presentation of who RetroGreen Energy is and he told us about the products, about the process, how long it will take, the clean up.
Day of installation: the dumpster arrived on time, the crew arrived on time, they started working right away, finished by mid afternoon and cleaned up after themselves. Very impressive.
They even do the paperwork for any Rebates that might be in place from the City, I just received my Rebate. All in all, it took less than a month.
So for my house, it was built in 1879, for the 16 years I have been here, I can tell you my furnace never shut off when it was below 20degrees outside and my heat never rose above 61degrees. After RetroGreen Energy did their magic, my furnace shuts off, (for quite a bit of time) and my house stays warm. Extremely happy. I highly recommend them.
Follow up, they send you pictures of what was in my wall spaces and attic space, I wasn't surprised, there was nothing. Also the"finished" pictures. I am so very happy to have run into them at a booth at the Sportsman Show.
A Very BIG Thank You to RetroGreen Energy,
Kathy
St. Paul
Day of installation: the dumpster arrived on time, the crew arrived on time, they started working right away, finished by mid afternoon and cleaned up after themselves. Very impressive.
They even do the paperwork for any Rebates that might be in place from the City, I just received my Rebate. All in all, it took less than a month.
So for my house, it was built in 1879, for the 16 years I have been here, I can tell you my furnace never shut off when it was below 20degrees outside and my heat never rose above 61degrees. After RetroGreen Energy did their magic, my furnace shuts off, (for quite a bit of time) and my house stays warm. Extremely happy. I highly recommend them.
Follow up, they send you pictures of what was in my wall spaces and attic space, I wasn't surprised, there was nothing. Also the"finished" pictures. I am so very happy to have run into them at a booth at the Sportsman Show.
A Very BIG Thank You to RetroGreen Energy,
Kathy
St. Paul
Nola Zane
Mar 12, 2016
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Our experience was very good. The salesman was experienced and knowledgeable. The employees on the job were polite and efficient. It took about five hours, less than we thought. Before the job started our attic was rated R16, after R60. And the blower test before and after was impressive. We have a vaulted ceiling in the living room and dining room. Another company we contacted wasn't interested in insulating the vault but no problem for RetroGreen. We recommend the company.