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Home Performance

RetroFoam Explained

Chris FroelkeOwner & Founder
2 min read

Last updated February 13, 2026

RetroFoam Explained
Injected Wall Insulation

Many homeowners in Minneapolis and St. Paul understand that the key to home performance in any home is a combination of high-performance insulation and air sealing. The confusion begins when attempting to choose the right type of insulation for one’s home, as there are a variety of different types of material on the market. Spray foam insulation, for example, is one of the more popular options out there, as is cellulose, which many people prefer for its more organic qualities and its ability to insulate exceptionally well. More effective than both of these options, however, is RetroFoam™.

At RetroGreen Energy, we believe in using only the highest-quality materials available to us in order to keep our customers warm and comfortable during the colder months of the year. Living in Saint Cloud or Minneapolis during the winter months can be challenging, and this is why we use RetroFoam™ to insulate the homes we work on. This state-of-the-art material is one of the best available for insulating your home, and we believe it to be the future of insulation.

What is RetroFoam™?

RetroFoam™ differs from other types of insulation in that it is a 3-part, nonflammable insulation material that can be injected into the wall cavity from either the outside or inside of the home, which provides a great deal of flexibility in the installation process. Another benefit of using RetroFoam™ is that it can be applied in addition to whatever insulation is already present, which means you don’t have to rip out your old insulation in order to upgrade.

Making the jump to RetroFoam™ insulation can help to enhance home performance in both the cold months of the year and the spring/summer, as it comes along with a very respectable R-value (which measures effectiveness) of between 14.5 and 16. It resists pests, does not promote mold growth and can help to save you a great deal of money on your home heating and cooling bill over time. Perhaps best of all, RetroFoam™ insulation can help make your home a more comfortable, enjoyable place to live for you and your family.

RetroGreen Energy – Your Local RetroFoam™ Expert

As RetroFoam™ is a specialized product, it requires a careful eye and attention to detail in order to be installed properly. Here at RetroGreen Energy, we hold a deep understanding of how to best approach the installation of this highly-effective material, no matter what type of existing material may currently be at play. We’re here to ensure that your home is properly insulated, and it doesn’t have to be out of reach if you work with the right material.

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Chris Froelke

Owner & Founder

Chris didn't start RetroGreen Energy because he wanted to be in the insulation business. He started it because he wanted to fix homes the right way.

After earning his BPI Building Analyst certification and Minnesota Building Contractor license, Chris spent years studying how homes perform as systems. He saw firsthand that most comfort and energy problems weren't caused by old windows or outdated furnaces — they were caused by air leakage and inadequate insulation that nobody was diagnosing properly.

In 2009, he launched RetroGreen Energy with a commitment to doing things differently. Every project would start with proper diagnostics. Every recommendation would be based on data, not sales targets. And every homeowner would get the honest truth about what their home actually needed.

Minnesota Licensed Building Contractor #631810BPI Certified Building AnalystTop 5 RetroFoam Dealer Nationwide4,500+ Homes Insulated16+ Years in Home PerformanceLicense #631810

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