We at RetroGreen Energy are committed to making Minnesota homes and buildings more comfortable, efficient, and healthy through professional insulation services. Specializing in residential, multi-unit, agricultural, industrial, and commercial projects, we apply advanced building science to solve problems like high utility bills, poor air quality, and ice dams.
Our RetroFoam injection insulation is designed to fill wall cavities completely without expanding or requiring demolition, making it a safe, biodegradable, fire-resistant, and hypoallergenic choice. This external installation method minimizes disruption while delivering maximum benefit. In attics, we perform meticulous air sealing with environmentally friendly spray foam, then install cellulose insulation to meet or exceed recommended R-values. These solutions work together to enhance comfort, reduce costs, and improve the overall indoor environment.
- Licensed
- Insured
- 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
- Cash
- Debit cards
- Credit cards




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
A great 3 man crew arrived on time; they were polite, got along well, worked efficiently, and clean up was like " they had never been there." My foundation plants survived very well and were treated with care. The double dutch lap siding was handled expertly.
Exterior sound from the neighborhood was reduced immediately. There's little doubt in my mind that propane and electricity usage will be reduced. It feels even more of a sweet, cozy little house now.
You have a great crew , Chris. Thank you for the thorough coverage of information and quote early on.I appreciate the immediate rebate application form being taken care of,too, Lupe.
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.
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!
Chris had a large crew doing our attic crawl space. Several trucks and lots of equipment. They had to open up the roof to access this tight space. The crew removed the old crappy insulation, foamed in new for R-60, repaired the roof with matching shingles. They where finishing up as the rain came. Excellent timing guys.
I am glad the team was so well prepared and did good job of cleaning up. We can feel the difference in our home already.
At each visit the crews showed up exactly on time. They confirmed the work to be done and asked multiple times if we had any questions before starting. They were good humored and engaging which is a monster plus for me. They worked efficiently and quickly. The finished work is better than we expected.
5 Stars!!
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.