Stop Drafts & High Energy Bills with RetroFoam Wall Insulation
Insulate your existing walls without removing drywall or siding. Minnesota's trusted RetroFoam injection foam installer serving Northern MN, Central MN, and the Twin Cities metro.
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License #631810
Is Poor Wall Insulation Costing You Money Every Month?
Minnesota's extreme temperature swings (from -30°F winters to 95°F summers) demand insulation that performs year-round. If your walls aren't properly insulated, you're fighting a losing battle against the elements and your utility bills.
Cold Walls in Winter
Your exterior walls feel cold to the touch, even when the furnace is running full blast. Certain rooms never seem to get warm enough, no matter how high you crank the heat.
Skyrocketing Energy Bills
Your heating and cooling costs keep climbing year after year. You're paying to condition air that's escaping through your poorly insulated walls.
Drafty, Uncomfortable Rooms
You can feel drafts near outlets and baseboards. Your HVAC system runs constantly but never catches up. Your family avoids certain rooms because they're too uncomfortable.
RetroFoam Injection – The No-Mess Way to Insulate Existing Walls
Unlike traditional insulation that settles, shifts, and leaves gaps, RetroFoam injection foam completely fills your wall cavities (getting into every nook and cranny) to stop air leakage and create a thermal barrier that lasts a lifetime.
Small Holes Drilled
We drill small access holes in your exterior siding (typically 2.5" diameter)
Foam Injected
RetroFoam is injected from top-to-bottom, completely filling every cavity
Holes Plugged
Access holes are professionally sealed and color-matched to your siding
Immediate Results
Feel the difference right away (dramatically lower energy bills to follow)
Why RetroFoam for Walls
- ✓ No interior work – no moving furniture, no vacating rooms, no drywall mess
- ✓ Completely fills wall cavities (unlike fiberglass batts that leave gaps and settle over time)
- ✓ Air sealing + insulation in one step – stops drafts at the source
- ✓ Most homes completed in 1 day with minimal disruption to your routine
- ✓ Lifetime warranty on material and installation – never needs replacement
- ✓ Sound deadening qualities reduce outside noise transmission into your home
- ✓ Won't settle or sag like traditional insulation – maintains R-value for life
See How RetroFoam Wall Insulation Works
Watch our expert crew transform a Minnesota home with RetroFoam injection foam wall insulation
Available Financing & Utility Rebates
Save up to $3,000 on your RetroFoam wall insulation project with utility rebates.
Xcel Energy Rebates
Xcel Energy customers can receive substantial rebates for wall insulation projects that improve home energy efficiency. Rebate amounts vary based on project scope and energy savings.
Check Eligibility →CenterPoint Energy Rebates
CenterPoint Energy offers rebates for insulation upgrades that reduce natural gas consumption. Maximize your savings!
View Rebates →Minnesota Energy Resources
Minnesota Energy Resources provides rebates for customers who improve their home's insulation. Our team can help you navigate the application process.
Get Details →0% Financing Available
Get your RetroFoam wall insulation project completed now and pay over time with 0% interest for up to 18 months. Start saving on energy bills immediately.
📞 Call (320) 252-8888What Minnesota Homeowners Are Saying
Real reviews from real customers who transformed their homes with RetroFoam
"We had RetroGreen insulate our walls with RetroFoam and the difference is incredible. Our heating bills dropped by almost 40% the first winter. The crew was professional, clean, and finished in one day. Highly recommend!"
"Our 1960s rambler was always drafty and cold. After RetroFoam wall insulation, every room is comfortable. No more cold spots, and we can actually use our guest bedroom in winter now. Worth every penny."
"The RetroGreen team was fantastic. They explained everything clearly, matched our siding perfectly when sealing the holes, and left no mess. Our walls are warmer and we're saving $150+ per month on energy."
"We struggled with ice dams every winter. Since RetroGreen installed RetroFoam in our walls, we haven't had a single ice dam. The air sealing made all the difference. Our attic stays cold like it should."
"Excellent service from start to finish. Free estimate was thorough, installation was quick and clean, and the results exceeded our expectations. We're recommending RetroGreen to all our neighbors."
"Our old house has never been this comfortable. The RetroFoam insulation stopped all the drafts we used to feel around outlets and baseboards. Plus it's much quieter inside now. Great investment in our home."
Your RetroFoam Wall Questions Answered
Get answers to the most common questions about RetroFoam injection foam insulation for existing walls
RetroFoam injection foam is designed to last the lifetime of your home. Unlike traditional insulation that can settle, compress, or deteriorate over time, RetroFoam maintains its structure and R-value permanently. We back this with a lifetime warranty on both materials and installation.
No interior work is required. We drill small access holes (typically 2.5" diameter) from the exterior through your siding. After injecting the foam, we professionally seal and color-match the holes. You won't need to move furniture, and there's no drywall mess to clean up.
Most residential wall insulation projects in Central Minnesota are completed in a single day. The exact timeline depends on your home's size and the number of walls being insulated. We work efficiently to minimize disruption to your routine.
RetroFoam is a type of injection spray foam designed specifically for existing enclosed wall cavities. Unlike traditional spray foam that requires open cavities, RetroFoam is injected through small holes without removing drywall or siding. It expands to fill every gap and void, providing superior air sealing and insulation in one step.
RetroFoam injection foam provides approximately R-14 to R-18 in a standard 2x4 wall cavity, depending on cavity depth. More importantly, it provides superior air sealing compared to traditional insulation, which is where most energy loss actually occurs.
Every home is different, so we provide free, no-obligation quotes based on your specific needs. Factors include your home's square footage, wall configuration, and accessibility. Many Minnesota homeowners find that energy savings pay for the investment within a few years, and utility rebates can significantly reduce upfront costs.
Absolutely. RetroFoam is specifically designed to handle temperature extremes from -30°F to 95°F+. Its closed-cell structure provides exceptional thermal performance and air sealing, which is critical for Minnesota homes dealing with ice dams, drafts, and high heating costs during our brutal winters.
Yes. Ice dams often form due to air leakage through walls allowing warm air into the attic. RetroFoam's superior air seal stops this thermal transfer, keeping your roof deck colder and more uniform in temperature, which helps prevent ice dam formation.
Yes. RetroFoam is non-toxic once cured and doesn't off-gas harmful chemicals. It doesn't contain formaldehyde, and it won't support mold or mildew growth. The product has been safely installed in thousands of homes across Minnesota for over 30 years.
Ready for Lower Energy Bills and a More Comfortable Home?
Get your free, no-obligation quote for RetroFoam wall insulation. Most Central Minnesota projects completed in one day with minimal disruption.
Get Your Free Quote →Proudly Serving St. Cloud, Twin Cities Metro, and Central Minnesota