
We utilize RetroFoam injection wall insulation to fill enclosed spaces with a safe, non-expanding, biodegradable, and fire-resistant material that conforms to any obstacle. This process is performed externally with minimal disruption to your home. In addition, our attic insulation services begin with precise air sealing to eliminate leaks, followed by installation of high-R-value cellulose insulation for sustained performance. The spray foam we use is among the most environmentally responsible in the industry. With these solutions, we deliver dependable comfort and measurable energy savings.
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




Kirk Kandler
Jun 09, 2025
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
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
Michael Spence
May 16, 2025
Melessa Jungles
Apr 26, 2025
Marian Kramer
Apr 04, 2025
Kristin Houle
Feb 25, 2025
Angie Einerson
Feb 15, 2025
Dennis Grabuski
Jan 24, 2025
Marcus Tolbert
Nov 22, 2024
Rick Heyne
Nov 09, 2024
Cole Mayer
Oct 03, 2024
Haley Tsuji
Sep 25, 2024
RetroGreen was great to work with! After coming to them with concerns about temperature fluctuations in our 2nd floor, they were quickly able to identify the problem (literally no insulation), and come back with a quote. They were able to fit us in quickly after receiving the down payment and clearly laid out all the tax and rebates available to us. Were very happy with the work and are excited to not freeze this winter!
Crystal Shirley
Sep 20, 2024
Scott Hemink
Jun 09, 2024
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!
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!
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!
Dick Olson
Feb 03, 2024
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.
Jennifer Posusta
Jan 09, 2024
Kit Johnson
Dec 28, 2023
Northland Steam Cleaners
May 20, 2023
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
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.
Dustin Antoine
Jan 01, 2023
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
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!
Andy Juelich
May 19, 2021
Fantastic group of people. From the sales team (Sam) explaining all aspects of the scope of work, with detailed photos and examples, to the team of installers that spent the time to explain the process and demonstrate how everything works. Paul (on site Supervisor) and his team (Andy, Jake and Vince) worked through some challenging conditions (rain and wind) without any concerns or complaints.
As a homeowner I wanted to ensure the team understood what my main concern was (drafty windows and doors), Paul spend additional time to discuss my main concerns with me and the team to ensure they were going to alleviate the issues I had. Paul, Andy, Jake and Vince were very professional while on site and prioritized their time to complete this project in the time they stated. This house was a bit of a challenge with previous renovations (the house was built in 1890) but Paul and the team worked with me to ensure we were able to achieve the intended outcome.
As a costumer I was very happy with the support and attention to detail that Paul and his crew preformed. I would highly recommend that anyone with insulating needs reach out to this group of devoted, determined, and highly skilled professionals. I'm very PROUD of the team and willing to answer any questions folks may have as I will continue to support this company.
And yes I'm a real person. Please see attached picture of the project.
As a homeowner I wanted to ensure the team understood what my main concern was (drafty windows and doors), Paul spend additional time to discuss my main concerns with me and the team to ensure they were going to alleviate the issues I had. Paul, Andy, Jake and Vince were very professional while on site and prioritized their time to complete this project in the time they stated. This house was a bit of a challenge with previous renovations (the house was built in 1890) but Paul and the team worked with me to ensure we were able to achieve the intended outcome.
As a costumer I was very happy with the support and attention to detail that Paul and his crew preformed. I would highly recommend that anyone with insulating needs reach out to this group of devoted, determined, and highly skilled professionals. I'm very PROUD of the team and willing to answer any questions folks may have as I will continue to support this company.
And yes I'm a real person. Please see attached picture of the project.
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
Nola Zane
Mar 12, 2016
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.