Upgrade your Cloquet home’s comfort and energy efficiency without tearing out a single wall.

Northeastern Minnesota winters push homes to their limits. When January temperatures average just 16°F during the day and drop to 2°F at night, thin or missing wall insulation means cold rooms, sky-high heating bills, and furnaces that run constantly.

RetroFoam injection foam changes that without the mess of traditional insulation. We drill small exterior holes, inject expanding foam that fills every cavity, then patch and finish. No drywall removal. No furniture moving. Just a warmer home and lower utility bills.

Why Do Cloquet Homes Lose So Much Heat Through Walls?

Cloquet sits along the St. Louis River, just 20 miles southwest of Duluth and Lake Superior. The city’s history shapes its housing stock in a unique way. After the devastating 1918 Cloquet Fire destroyed most of the town, rebuilding happened rapidly throughout the 1920s and 1930s. Many of these Craftsman homes and bungalows are now over 100 years old and were built when insulation standards were minimal or nonexistent.

Cloquet winters are brutal. January temperatures average just 2.5°F at night with highs barely reaching 16°F. Temperatures regularly plunge below zero and can drop past minus 18 degrees. While Lake Superior moderates temperatures slightly compared to inland areas, the cold is still relentless. When your walls lack proper insulation, conditioned air escapes constantly. Your furnace works overtime. Ice dams form when heat bleeds through walls and melts snow on your roof.

RetroFoam wall insulation creates a continuous thermal barrier that stops heat loss and air infiltration. It performs for decades without settling, sagging, or losing effectiveness.

How Does RetroFoam Compare to Other Insulation Types?

Traditional insulation like fiberglass and cellulose only slows heat transfer through conduction. RetroFoam injection foam stops heat loss through both conduction and convection by creating a complete air seal that traditional materials cannot achieve.

RetroFoam vs. Fiberglass: Fiberglass batts leave gaps around wiring and plumbing, allowing air to move freely. Studies show fiberglass loses R-Value below 32°F. RetroFoam’s R-Value actually increases to R-5 per inch at 30°F, making it ideal for Cloquet’s extreme winters.

RetroFoam vs. Blown-In Cellulose: Cellulose settles 15-20% over time, reducing coverage and creating cold spots near the top of walls. RetroFoam maintains its position permanently and never needs to be topped off or replaced.

The Bottom Line: In a standard 2×4 wall cavity, RetroFoam delivers R-16 insulation value plus a complete air seal. The air seal alone can reduce energy bills by up to 30%.

Can You Add Wall Insulation Without Removing Drywall?

Yes. This is exactly what RetroFoam injection foam is designed for. Traditional wall insulation methods require tearing out drywall, which is expensive, disruptive, and leaves your home in chaos for days or weeks.

RetroFoam changes everything. We access wall cavities from the outside by drilling small holes through your siding. High-density injection foam fills every gap, expanding around wiring, pipes, and framing. Once complete, we patch the holes and restore your siding to its original condition.

No contractors in your living space. No furniture to move. No drywall dust. Just permanent insulation that performs from day one.

Benefits of RetroFoam Insulation

While blown-in cellulose and fiberglass settle over time and lose effectiveness, RetroFoam’s rigid structure stays in place permanently. You get consistent R-value performance that protects your investment for decades, not years.

How Is RetroFoam Installed in Existing Walls?

RetroFoam is installed as a liquid using patented resin, foaming agent, and compressed air. The process is fast, minimally invasive, and highly effective:

Step 1: Exterior Access – We remove a single course of siding and drill 2.5-inch holes into each wall cavity. A borescope camera inspects for obstructions like fire blocks or electrical boxes.

Step 2: Foam Injection – RetroFoam is injected from the top of each cavity to the middle, then from the bottom up. This ensures complete coverage around all wiring, pipes, and framing.

Step 3: Quality Check – We verify each cavity is fully filled, plug all holes, replace the siding, and complete a final walkthrough inspection.

Most Cloquet area homes are finished in 4 to 6 hours. No interior work required. Your walls stay intact and you get permanent insulation that won’t settle or degrade.

Why Do Cloquet Homeowners Choose RetroGreen Energy?

RetroGreen Energy is an authorized RetroFoam dealer and one of the top five installers nationwide. We’ve served Minnesota homeowners since 2009 and now bring our expertise to Cloquet and the greater Duluth area.

Our team brings building science expertise and understands how Minnesota’s extreme climate stresses homes. We know which homes are good candidates for injection foam and which aren’t. And we stand behind our work with clear communication, professional installation, and transparent pricing.

Customers choose us for straightforward answers, quality workmanship, and results that last.

Is Your Cloquet Home Right for RetroFoam?

Check multiple boxes? Your home is likely a great candidate for RetroFoam. Get a free quote or call (320) 252-8888 to schedule an assessment.

What Rebates Are Available for Cloquet Homeowners?

Cloquet homeowners with Minnesota Energy Resources natural gas service may qualify for up to $1,200 in utility rebates for sidewall insulation through their air sealing and insulation program.

These utility rebates can be combined with the federal tax credit of up to 30% on insulation material costs (up to $1,200 per year) through 2032.

We help you navigate available programs and ensure your project qualifies for maximum savings. Many Cloquet homeowners offset 40-50% of their project cost through rebates and tax credits.

Frequently Asked Questions

Have a question we didn’t answer? Call us at (320) 252-8888 or send us a message. We’re happy to help.

Panel siding injection: when siding can’t be removed

Steel, vinyl, aluminum siding:

Interior wall injection through sheet rock:

Serving Cloquet, Carlton, Scanlon, Duluth, Proctor, Hermantown, and all of Carlton County

RetroGreen Energy is Minnesota’s specialty insulation contractor. Learn more about us or contact us today.