
We use RetroFoam injection foam for wall insulation, a non-expanding, biodegradable, fire-resistant, and hypoallergenic solution that fills enclosed cavities completely without invasive construction. This process is performed externally for minimal disruption. Our attic insulation combines comprehensive air sealing with cellulose application to maximize thermal performance and comfort. We rely on environmentally conscious spray foam technology to ensure long-lasting, safe results. Our goal is to help you achieve an efficient, healthy, and comfortable indoor environment.
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
Follow us
Services




Reviews (30)
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
Michael Hill
Jun 01, 2025
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!
Good work fellas!
Melessa Jungles
Apr 26, 2025
Marian Kramer
Apr 04, 2025
Kristin Houle
Feb 25, 2025
Angie Einerson
Feb 15, 2025
Laurie Yahn
Jan 03, 2025
Nick Dunning
Oct 31, 2024
Cole Mayer
Oct 03, 2024
Susan Wasson
Sep 28, 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
Craig Burlingame
Jun 23, 2024
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.
Kara Newman
Jun 10, 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!
Dick Olson
Feb 03, 2024
Joe Metzger
Dec 10, 2023
Lisa Berg
Nov 18, 2023
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.
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
Dick Taylor
Feb 23, 2023
I had RertroGreen remove and reinstall attic insulation in our 25 year old house as it was apparent what was in there, wasn't doing the job. Our furnace ran constantly when temperature got below 10 F, and we had 5 foot icicles growing off the roof, even when temperatures were below freezing. Ergo, there was a massive heat loss. RetroGreen came in and in the space of 2 days, removed the old insulation, sealed and wrapped anything that needed it, (which was a lot!) and replaced it with new insulation. This was impressive to me as this is a large attic 3000+ sq.ft..
While it has been less than a week since they finished their work and I should actually give it more time before I make any permanent judgements, I can state at this time that during the recent snowstorm and subsequent sub-zero temperatures, the house stayed warm and draft free and the furnace spent more time off than on!
I am very happy with the results. There was a 30% reduction in air loss after the insulation was installed.
While it has been less than a week since they finished their work and I should actually give it more time before I make any permanent judgements, I can state at this time that during the recent snowstorm and subsequent sub-zero temperatures, the house stayed warm and draft free and the furnace spent more time off than on!
I am very happy with the results. There was a 30% reduction in air loss after the insulation was installed.
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
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!
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.
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
Kathy Kamrud
Jun 19, 2017
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