
We at RetroGreen Energy are dedicated to creating comfortable, efficient, and healthy indoor environments. Serving Minnesota, we specialize in insulating homes and buildings of all kinds, including single-family residences, apartments, agricultural facilities, and commercial properties. Our solutions are grounded in advanced building science to ensure optimal energy performance and cost savings while tackling persistent problems like ice dams, moisture, and poor air quality.
Our RetroFoam injection foam insulation is designed to fill enclosed wall cavities seamlessly, providing superior insulation without damaging walls or requiring invasive work. Safe for families, biodegradable, fire-resistant, and hypoallergenic, RetroFoam is installed externally by removing just a strip of siding. For attic insulation, our process begins with comprehensive air sealing using safe, environmentally responsible spray foam, followed by cellulose insulation to meet Minnesotas demanding climate standards. Together, these services deliver lasting comfort and lower utility costs.
Our RetroFoam injection foam insulation is designed to fill enclosed wall cavities seamlessly, providing superior insulation without damaging walls or requiring invasive work. Safe for families, biodegradable, fire-resistant, and hypoallergenic, RetroFoam is installed externally by removing just a strip of siding. For attic insulation, our process begins with comprehensive air sealing using safe, environmentally responsible spray foam, followed by cellulose insulation to meet Minnesotas demanding climate standards. Together, these services deliver lasting comfort and lower utility costs.
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)
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!
Marian Kramer
Apr 04, 2025
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Sandy Saline
Mar 21, 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.
Vernon Hedlin
Feb 20, 2025
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The crews arrived right at the time expected, went right to work and everyone seemed to know just what their job was. Worked very well together and were very courteous and concerned whether or not I had any questions about the process. The job went very well and when they were finished, everything was cleaned up just like they had never been there. I am sure when winter comes we will notice a big difference in the warmth of our 100+ year old house.
Dennis Grabuski
Jan 24, 2025
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Laurie Yahn
Jan 03, 2025
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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.
Marcus Tolbert
Nov 22, 2024
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John Botts
Aug 24, 2024
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Paul Joseph Greene
Aug 16, 2024
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RetroGreen Energy is the best! 5 STARS is NOT ENOUGH!
We are so grateful for RetroGreen's commitment to excellent work, and to treating us with respect.
That started from the very first moment Don arrived for our estimate, and never stopped. He was knowledgable, thoughtful, and responsive even after we had made our final payment. The crew was professional, courteous, and businesslike throughout.
When we noticed a minor oversight, and brought it to their attention, in less than an hour we heard from a member of the team who scheduled a time to come out and make things right. And that's just what they did.
They even helped us with energy rebates that made it possible for us to afford this attic and sunroom insulation project.
We say again: 5 STARS is NOT ENOUGH!
We are so grateful for RetroGreen's commitment to excellent work, and to treating us with respect.
That started from the very first moment Don arrived for our estimate, and never stopped. He was knowledgable, thoughtful, and responsive even after we had made our final payment. The crew was professional, courteous, and businesslike throughout.
When we noticed a minor oversight, and brought it to their attention, in less than an hour we heard from a member of the team who scheduled a time to come out and make things right. And that's just what they did.
They even helped us with energy rebates that made it possible for us to afford this attic and sunroom insulation project.
We say again: 5 STARS is NOT ENOUGH!
Kara Newman
Jun 10, 2024
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Kelly Tuttle
Feb 23, 2024
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Sara Schmidt
Feb 09, 2024
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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!
Dick Olson
Feb 03, 2024
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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.
Jennifer Posusta
Jan 09, 2024
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Kit Johnson
Dec 28, 2023
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Lisa Berg
Nov 18, 2023
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Kim Berndt
Jun 04, 2023
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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.
Janel Weinkauf Yasgar
Mar 07, 2023
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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!!
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!!
Paul Udstrand
Dec 20, 2022
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We used RetroGreen to replace attic insulation and inject insulation into our bedroom walls. The entire crew was friendly, courteous, and extremely willing to answer any questions. They arrived on time and finished in a few hours. Everything from the dumpster delivery to the arrival of the crew was on time as scheduled. The quality of the work is outstanding. I would recommend RetroGreen to anyone looking for insulation installers.
Bret Hepola
Dec 03, 2022
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As a business owner in the service industry, I was overly impressed with the amount of effort they took to protect the entire house. The entire crew worked their tails off. Nick, the foreman was hands down amazing and answered all of my questions.. Communicative, responsive and a pleasure to work with. Not only did the protection of the house amaze me, the clean-up was just as good. I highly recommend this crew!
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.
Michael Morton
Dec 04, 2021
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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 Wegner
Nov 18, 2021
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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
Clay Bennett
Feb 24, 2017
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The company representative at the home improvement trade show was knowledgeable and easy-going, which made it easier to ask for a home visit. The scheduler and estimator were friendly and responsive, and gave straight answers quickly. And the crew was best of all: punctual, professional, personable, and thorough. From first meeting to completed project was less than a month, and I'm very happy with the results.