Your Home Is Losing Energy Right Now
Most homeowners blame their windows. The real problem? Air leaks through your walls, attic, and crawl space are silently wasting 40% of your energy.
It's Not Your Windows
Energy loss from air leaks
Insulation and air sealing solve what window replacement can't.
Wasted annually
The average Minnesota home loses over $800 per year to poor insulation.
Average bill reduction
Our customers see measurable savings within the first heating season.
Professional Insulation Solutions
Most PopularWall Insulation
RetroFoam injection foam fills wall cavities to seal air leaks and improve insulation without disrupting your walls.
Highest ImpactAttic Insulation
Achieve optimal R-values and dramatically reduce heat loss with professional attic insulation.
Spray Foam Insulation
Open-cell and closed-cell spray foam for crawl spaces, basements, and attics with superior air sealing.
Air Sealing
Seal leaks around windows, doors, electrical outlets, and ducts to stop unwanted air infiltration.
Foundation Insulation
Insulate your foundation to stop cold floors, reduce moisture, and improve whole-home efficiency.
Crawl Space Insulation
Seal and insulate crawl spaces to prevent moisture, improve air quality, and boost efficiency.
Utility Rebates & Financing
Minnesota utilities offer substantial rebates for qualifying insulation projects. We handle all the paperwork, and our partnerships with financing providers offer flexible, zero-interest options.
Xcel Energy
40% of cost up to $1,200 each for attic and wall insulation, plus $600 for air sealing.
CenterPoint Energy
Up to $1,500 wall insulation, $1,300 attic + air sealing combo. Gas-heat customers.
MN Energy Resources
50% of cost up to $750 sidewall, $650 attic + air sealing combo. Gas-heat customers.
Otter Tail Power
40% of cost up to $1,000 attic, $1,000 wall, $800 air sealing. $2,800 annual cap. Electric-heat homes.
Three Simple Steps
Schedule Your Assessment
Call or book online for a free home energy assessment. Our BPI-certified analyst performs a detailed inspection, checking insulation levels, air leaks, and overall home performance using thermal imaging technology.
Get Your Custom Plan
Based on the assessment, we provide a detailed proposal with specific recommendations, projected energy savings, available rebates, and financing options tailored to your home and budget.
Professional Installation
Our certified crew completes most projects in a single day. We clean up, apply rebates, and provide a warranty on all workmanship so you can enjoy your savings immediately.
WHAT OUR CUSTOMERS SAY
Trusted by Minnesota Homeowners
4.9
Google Rating
4,500+
Homes Insulated
Top 5
Nationwide RetroFoam Dealer
16+
Years of Experience
Chris Froelke
BPI Certified Building Analyst & Owner
Chris founded RetroGreen Energy in 2009 with a mission to help Minnesota homeowners reclaim their energy efficiency and lower their heating bills. What started as a passion project has grown into one of Minnesota's most trusted names in home insulation and air sealing.
With a BPI Building Analyst certification, Chris brings science-backed expertise to every project. He stays current with industry certifications, emerging technologies, and energy code changes to ensure RetroGreen always delivers the highest standards of quality and performance.
When he's not assessing homes or managing crews, Chris is involved in the Minnesota Contractors Association and mentoring the next generation of building performance professionals.
MN Licensed Building Contractor #631810
Fully licensed and insured for all residential projects
BPI Certified Building Analyst
Trained in blower door testing, thermal imaging, and energy diagnostics
RetroFoam Certified Installer
Authorized dealer and installer of RetroFoam injection foam
Serving Central Minnesota & the Twin Cities
St. Cloud
(320) 252-8888
Central Minnesota headquarters
Twin Cities
(612) 276-5293
Minneapolis & St. Paul area
Duluth / Northern MN
(218) 414-7775
Duluth, Brainerd & surrounding areas