We Fix Homes, Not Just Symptoms
At RetroGreen Energy, we believe every home deserves to be comfortable, efficient, and healthy. For over 16 years, we've been helping Minnesota homeowners solve their toughest energy challenges with science-based solutions and honest expertise.
Our Story
RetroGreen Energy was founded in 2009 by Chris Froelke with a simple mission: to bring building science expertise to Minnesota homeowners tired of cold drafts, high energy bills, and contradictory advice from contractors.
What started as a one-man operation in St. Cloud has grown into a respected team serving Central Minnesota and the Twin Cities. We've helped over 4,500 families improve their home comfort and reduce energy costs through honest assessment and quality workmanship.
Today, RetroGreen Energy is recognized as one of the top RetroFoam dealers in the nation and continues to set the standard for integrity and expertise in the insulation and energy efficiency industry.
What Makes Us Different
We don't just install insulation—we solve problems with integrity and expertise.
Diagnose Before We Prescribe
We perform thorough energy audits to identify actual problems, not just assumptions about what your home needs.
No-Pressure Approach
Our goal is to give you honest information so you can make the best decisions for your home and budget.
Measurable Results
We track and document energy improvements, so you can see exactly how our work benefits your home.
Top 5 Nationally
Recognized as one of the top RetroFoam injection foam dealers in the nation for quality and customer satisfaction.
Licensed and Certified
Our team holds BPI and other industry certifications, so the work meets high professional standards.
Built for Minnesota
Over 16 years of experience solving Minnesota-specific challenges: extreme cold, moisture, and seasonal variations.
Key Credentials
- MN Licensed Building Contractor #631810
- BPI Certified Building Analyst
- Top 5 RetroFoam Dealer Nationwide
- 4,500+ Homes Insulated
- 16+ Years in Home Performance
Chris Froelke
Founder & Energy Auditor
Chris founded RetroGreen Energy after years of frustration with the lack of honest, science-based guidance available to Minnesota homeowners. With a background in building science and HVAC, he saw an opportunity to combine technical expertise with genuine care for customer outcomes.
His philosophy is simple: diagnose before you prescribe. Every RetroGreen project starts with a full energy audit to identify real problems, not assumed ones. This approach has earned the trust of thousands of homeowners and industry recognition across the nation.
When he's not improving homes, Chris stays involved in the community through building science education and local energy efficiency initiatives. He's dedicated to helping Minnesotans live more comfortably while reducing their environmental impact.
"Our job isn't to sell insulation. It's to solve problems honestly. The rest follows naturally."
Our Promises to You
Honest Assessment
We tell you exactly what your home needs, not what we want to sell you. Your trust is everything.
Transparent Pricing
No hidden fees, no surprise costs. You know exactly what you're paying for before we start work.
Quality Installation
Professional craftsmanship on every project. We stand behind our work with comprehensive warranties.
Lasting Results
Our solutions are built to last decades, delivering comfort and savings season after season.
By the Numbers
4,500+
Homes Insulated
16+
Years Experience
4.9
Google Rating
Top 5
RetroFoam Dealer
Service Areas
Serving Central Minnesota and the Twin Cities metro
St. Cloud
(320) 252-8888Minneapolis
(612) 276-5293St. Paul
(612) 276-5293Bloomington
(612) 276-5293Plymouth
(612) 276-5293Duluth
(218) 414-7775WHAT OUR CUSTOMERS SAY
Trusted by Minnesota Homeowners
"Chris and his team were honest from the start. They told us exactly what our home needed — no upselling. The difference in comfort has been incredible, especially during the winter."
Sarah & Mike T.
St. Cloud, MN
"RetroGreen insulated our 1960s rambler and our heating bill dropped by over 30%. The crew was professional, clean, and finished on time."
Jim K.
Sartell, MN
"We had three other companies quote us. RetroGreen was the only one that did an actual energy audit first instead of just guessing. That told us everything we needed to know."
Linda M.
Plymouth, MN
"The ice dams on our roof are completely gone after RetroGreen insulated and air sealed our attic. Should have done this years ago."
Dave & Karen R.
Duluth, MN
4,500+
Homes Insulated
4.9★
Google Rating
16+
Years Experience
Top 5
National Dealer