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Foam Insulation for Existing Homes

Existing Home Insulation in Southern Wisconsin and Northern Illinois

If you have air leaks in your home, the best way to nip them in the bud is to add foam insulation from top to bottom. If you live in southern Wisconsin or northern Illinois, you know what the winters and summers are like. Don’t leave your home open to those elements, so it’s either too hot or too cold because you have little to no insulation.

The benefits of sealing the building envelope of your home include:

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Stop Drafts

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Lower Energy Bills

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Enjoy Comfortable Rooms

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Prevent Condensation

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Block Ice Dams

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Put an End to Cold Floors

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No More Frozen Pipes

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Improve Home Comfort

Areas We Insulate

Attics

Keep the air you pay to treat inside your home, not leaking through your roof.

Existing Walls

You don’t have to worry about a complete home remodel to add RetroFoam injection foam to your existing walls.

Crawl Spaces

After adding spray foam insulation, you won’t have to worry about drafts, uncomfortable floors, mold, or mildew in your crawl space.

RetroFoam was great. Two different teams to insulate my 100+ year old home. They were efficient, polite and organized. Very friendly & approachable. Thanks to Mike, James, Mason & Scott who climbed under my 3 season room to spray foam (I couldn't face those ...
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Anne Hautala
RetroFoam was great. Two different teams to insulate my 100+ year old home. They were efficient, polite and organized. Very friendly & approachable. Thanks to Mike, James, Mason & Scott who climbed under my 3 season room to spray foam (I couldn't face those spiders!). Thanks to Zach, Cade, Felix, Cisco & Rob who spent hours getting foam into my walls and cleaning up beautifully! Great job guys!
Anne Hautala
Anne Hautala
The crew did an excellent job, and my wife can find fault with anything because she has high expectations on workmanship, she said she would give them more than 5 star. The crew was extremely polite and respectful and did an ...
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Chris Matlock
The crew did an excellent job, and my wife can find fault with anything because she has high expectations on workmanship, she said she would give them more than 5 star. The crew was extremely polite and respectful and did an excellent job on clean up after insulating my whole house.
Chris Matlock
Chris Matlock
We had Ken and his crew insulate our entire home. They were very efficient and did a great job. We discovered a good chunk of our home had no insulation in it! So glad we had this done. We could ...
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Michael Burke
We had Ken and his crew insulate our entire home. They were very efficient and did a great job. We discovered a good chunk of our home had no insulation in it! So glad we had this done. We could instantly tell the difference and has also reduced noise from outside. Thanks again Ken and keep up the great work.
Michael Burke
Michael Burke
100% Recommend! My husband and I moved into our home during the winter months and noticed the heat wasn’t staying inside and the furnace seemed to constantly be running. On day 1 we got our then current, poorly...
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Alexis Fitzer
100% Recommend! My husband and I moved into our home during the winter months and noticed the heat wasn’t staying inside and the furnace seemed to constantly be running. On day 1 we got our then current, poorly installed insulation taken out from the attic. Day 2 they spray foamed the attic and on day 3 we got our exterior spray foamed, as well. Already, we have noticed our air conditioning running far, far less, our house is quieter and we didn’t even notice that the neighbors had people over until we looked outside.
Alexis Fitzer
Alexis Fitzer
Erik and the team were great. Erik made the initial visit and quoting process easy. It is now the middle of the winter and we are seeing great results from having RetroFoam insulation in our walls. Couldn’t...
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Erik Rusch
Erik and the team were great. Erik made the initial visit and quoting process easy. It is now the middle of the winter and we are seeing great results from having RetroFoam insulation in our walls. Couldn’t be happier!
Erik Rusch
Erik Rusch
Retrofoam reinsulated our 120+ year old farmhouse and it's made a huge difference! Our energy bill is already lower and our entire house is more comfortable. They did the whole job in one day, our siding looks untouched, and they cleaned ...
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Kelsey Stilson
Retrofoam reinsulated our 120+ year old farmhouse and it's made a huge difference! Our energy bill is already lower and our entire house is more comfortable. They did the whole job in one day, our siding looks untouched, and they cleaned up afterwards perfectly. They provided a major improvement for an affordable price. I would highly recommend them to anyone looking for insulation solutions.
Kelsey Stilson
Kelsey Stilson
We just had our Walls insulated with the Retrofoam. The process was quick whole house was done with install & clean-up in a few hours. The Installers were polite & courteous to our property.
Debra Winter
We just had our Walls insulated with the Retrofoam. The process was quick whole house was done with install & clean-up in a few hours. The Installers were polite & courteous to our property.
Debra Winter
Debra Winter
Very professional. Answered all my questions. Came in and got it done. Cleaned up, and stayed off girlfriends flowers! Thank you
Mark Jackson
Very professional. Answered all my questions. Came in and got it done. Cleaned up, and stayed off girlfriends flowers! Thank you
Mark Jackson
Mark Jackson
​​We called for a consultation, and John came out to our house to look around and give us a full home analysis on potential areas of heat loss in our house. John was extremely personable and really cared...
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Paul Sherman
​​We called for a consultation, and John came out to our house to look around and give us a full home analysis on potential areas of heat loss in our house. John was extremely personable and really cared for our opinion and was not pushing for the sale, but what was right for our house. Thank you John for the great experience, and thank you RetroFoam for the opportunity and experience.
Paul Sherman
Paul Sherman
Mike, James, Mason and Scott were excellent! They were very responsible and completed the job perfectly! They cleaned up after themselves and were respectful of my home. I am looking forward to lower heating bills this winter...
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Julie Schreiber
Mike, James, Mason and Scott were excellent! They were very responsible and completed the job perfectly! They cleaned up after themselves and were respectful of my home. I am looking forward to lower heating bills this winter and I think doing this insulation will pay for itself. I’m sorry we didn’t do it sooner.
Julie Schreiber
Julie Schreiber

Insulating Your Existing Home with RetroFoam of Southeastern Wisconsin

Sealing the entire building envelope of your home is essential to making it the energy-efficient and comfortable space you know it can be.

Sealing your home’s building envelope with foam insulation essentially means air sealing the house from the top to the bottom. Adding spray foam insulation to the attic and crawl space and injection foam to the existing walls will keep the air you pay to heat and cool inside while keeping uncomfortable outdoor air out.

Looking at your insulation project as a whole house system is how you will get the best comfort and energy savings results.

We also offer a lifetime warranty, so if you need us in the future, we’ll be there to help you out.

Take the Next Step Towards Comfort and Energy Efficiency

Contact us to schedule your free estimate today.