--- title: RetroFoam Injection Foam Insulation description: Annoyed by your uncomfortable home and high energy bills? RetroFoam injection foam insulation can help you take back control of your home by... image: https://www.retrofoam.com/hubfs/Dealers/InjectionFoamCavities.jpg --- The Best Insulation for Existing Homes - [Read the Buyer's Guide](https://www.retrofoam.com/buying-retrofoam-insulation) [![150x100_RetroFoamCorporate_RegisteredLogo_RGB](https://www.retrofoam.com/hubfs/150x100_RetroFoamCorporate_RegisteredLogo_RGB.png) ](https://www.retrofoam.com/) [ Find a Dealer ](https://www.retrofoam.com/dealers) ** ** - RetroFoam Projects - [RetroFoam for Existing Walls](https://www.retrofoam.com/injection-foam-insulation-existing-walls) - [RetroFoam for Block Walls](https://www.retrofoam.com/injection-foam-insulation-block-walls) - Pricing - [Cost Factors](https://www.retrofoam.com/cost) - [Install Process](https://www.retrofoam.com/install-process) - [Reviews](https://www.retrofoam.com/reviews) - [Learning Center](https://www.retrofoam.com/blog) - About - [Our Story](https://www.retrofoam.com/about) - [Become a Dealer](https://www.retrofoam.com/become-dealer) - [Contact Us](https://www.retrofoam.com/contact) ** RetroFoam Projects Back [ RetroFoam for Existing Walls ](https://www.retrofoam.com/injection-foam-insulation-existing-walls) [ RetroFoam for Block Walls ](https://www.retrofoam.com/injection-foam-insulation-block-walls) Pricing Back [ Cost Factors ](https://www.retrofoam.com/cost) [ Install Process ](https://www.retrofoam.com/install-process) [ Reviews ](https://www.retrofoam.com/reviews) [ Learning Center ](https://www.retrofoam.com/blog) About Back [ Our Story ](https://www.retrofoam.com/about) [ Become a Dealer ](https://www.retrofoam.com/become-dealer) [ Contact Us ](https://www.retrofoam.com/contact) [ Find a Dealer ](https://www.retrofoam.com/dealers) # Create a More Comfortable and Energy Efficient Home with RetroFoam ## Insulate existing walls without the mess of a full remodel. [Find a Dealer](https://www.retrofoam.com/dealers) [** ![InjectionHomepageThumbnail](https://www.retrofoam.com/hubfs/InjectionHomepageThumbnail.gif) ](https://www.retrofoam.com/hubfs/Videos/Home-Page-Video-2026.mp4) Watch How RetroFoam Works ![Vinyl_Injection_Existing](https://www.retrofoam.com/hubfs/Install%20Process/Vinyl_Injection_Existing.jpg) ## Are You Tired of an Uncomfortable Home with High Energy Bills? Whether it’s the dead of winter or the dog days of summer, your home isn’t a very comfortable place to be. You’re dealing with cold drafts, fluctuating temperatures, and high monthly energy bills. You’ve also noticed condensation on the walls, uncomfortable rooms, as well as mold and mildew. These issues are caused by the lack of insulation in your exterior walls. If there is little to no insulation in those exterior walls, or the insulation you have isn’t doing its job, there is room for air movement into and out of your home. Air leakage is the main contributing factor to the comfort issues you’re experiencing. [Find a Dealer](https://www.retrofoam.com/dealers) ![Vinyl_Injection_Existing](https://www.retrofoam.com/hubfs/Install%20Process/Vinyl_Injection_Existing.jpg) ## RetroFoam Injection Foam Insulation for Your Existing Walls Transform your family’s comfort and peace of mind with RetroFoam insulation. ** ### Stop Drafts RetroFoam insulation creates an air seal that will stop those annoying drafts from getting inside your home. ** ### Lower Energy Bills Lower your monthly energy bills up to 50 percent with the air seal created by injection foam insulation. ** ### Deaden Outside Noise An added bonus of RetroFoam insulation is that it can reduce the outdoor noise in your home to give you a quieter space. ** ### Home Comfort Transformation Take back control of your home with RetroFoam's air seal, so it's no longer too hot or too cold. ** ### Maintain Constant Temperatures Stop your furnace and air conditioner from constantly running with the air seal that helps maintain a constant temperature. ** ### Prevent Condensation, Mold, and Mildew RetroFoam insulation prevents condensation from forming and doesn't promote the growth of mold and mildew. [Tell Me More](https://www.retrofoam.com/injection-foam-insulation-existing-walls) #### “I am a repeat customer, I was so impressed with my energy savings the first time that when I moved, I had to do it again. The work crew was wonderful, when they left, the only sign that anyone had been here is that my home was cozy and warm. It’s absolutely the best thing to do for your home.” Ann M. [Read More Reviews](https://www.retrofoam.com/reviews) ** ** [** ![JeffMiller_Testimonial_Thumbnail](https://www.retrofoam.com/hubfs/Videos/Video%20Thumbnails/JeffMiller_Testimonial_Thumbnail.jpg) ](https://www.retrofoam.com/hubfs/Videos/1-00%20Jeff%20Miller%20Testimonial%2016-9%20%20(Polymaster)_2.mp4) Hear From a RetroFoam Customer ## Insulate Existing Walls Without the Mess of a Full Remodel The insulation you have in your walls can make a huge difference in the comfort of your home, as well as the energy efficiency. If you have old cellulose or fiberglass in those exterior walls, then air will be able to move through those materials. If you have no insulation, then there’s really nothing stopping that air from getting inside your home. That’s why what’s inside your walls matters. Injection foam insulation creates an air seal that will stop that air movement into and out of your home. Stopping that air leakage will help solve the problems plaguing your home for as long as you can remember. [Find a Dealer](https://www.retrofoam.com/dealers) [** ![JeffMiller_Testimonial_Thumbnail](https://www.retrofoam.com/hubfs/Videos/Video%20Thumbnails/JeffMiller_Testimonial_Thumbnail.jpg) ](https://www.retrofoam.com/hubfs/Videos/1-00%20Jeff%20Miller%20Testimonial%2016-9%20%20(Polymaster)_2.mp4) Hear From a RetroFoam Customer ![Reading Buyers Guide](https://www.retrofoam.com/hubfs/Buyers%20Guide%20Pillar/ReadingBuyersGuide.jpg) ## All Your Questions, Answered #### Read our buyer's guide to learn everything you need to know about RetroFoam insulation for your existing walls. [Read the Guide](https://www.retrofoam.com/buying-retrofoam-insulation) ![Reading Buyers Guide](https://www.retrofoam.com/hubfs/Buyers%20Guide%20Pillar/ReadingBuyersGuide.jpg) ## Typical RetroFoam Install Process The installation process for existing walls can vary depending on your home's exterior.  For the typical install, we deal with vinyl or aluminum siding. If you want to learn more about the installation process for other exterior types, check out our [Install Process page](https://www.retrofoam.com/install-process). - Remove Siding - Drill in Each Cavity - Inject RetroFoam - Replace Siding & Cleanup 1. Remove Siding 2. Drill in Each Cavity 3. Inject RetroFoam 4. Replace Siding & Cleanup ![Dennis_RemoveSiding_Vinyl](https://www.retrofoam.com/hs-fs/hubfs/Images/Dennis_RemoveSiding_Vinyl.jpg?width=1078&name=Dennis_RemoveSiding_Vinyl.jpg) ### 1 ### Remove a strip of siding around the home. The first step of the injection foam insulation installation process is to remove a row of siding from around the home. This is done to give the installer access to the sheathing underneath. ![Dennis_RemoveSiding_Vinyl](https://www.retrofoam.com/hs-fs/hubfs/Images/Dennis_RemoveSiding_Vinyl.jpg?width=1078&name=Dennis_RemoveSiding_Vinyl.jpg) ![Dennis_DrillHole](https://www.retrofoam.com/hs-fs/hubfs/Images/Dennis_DrillHole.jpg?width=1500&name=Dennis_DrillHole.jpg) ### 2 ### Drill a hole in each stud cavity and check for obstructions. Once the siding has been removed, the installer will drill a hole into each stud cavity. They will use a tool and run it up and down, then side to side to feel for any obstructions in the wall. ![Dennis_DrillHole](https://www.retrofoam.com/hs-fs/hubfs/Images/Dennis_DrillHole.jpg?width=1500&name=Dennis_DrillHole.jpg) ![Dennis_Injection](https://www.retrofoam.com/hs-fs/hubfs/Images/Dennis_Injection.jpg?width=1500&name=Dennis_Injection.jpg) ### 3 ### Inject RetroFoam insulation into each cavity. Now that the holes have been drilled, the installer will run the hose up to the top of the cavity and begin injecting the foam. Once they hit the middle of the cavity, they will run the hose from the bottom up. This method ensures the cavity is completely filled with foam. ![Dennis_Injection](https://www.retrofoam.com/hs-fs/hubfs/Images/Dennis_Injection.jpg?width=1500&name=Dennis_Injection.jpg) ![Dennis_ReplaceSiding](https://www.retrofoam.com/hs-fs/hubfs/Images/Dennis_ReplaceSiding.jpg?width=1500&name=Dennis_ReplaceSiding.jpg) ### 4 ### Plug holes, replace siding and cleanup project. After the foam has been injected into each stud cavity, the drilled holes are plugged, and the siding is replaced. The installer and their crew will then clean up any siding that has foam on it and clean up the area around the install. ![Dennis_ReplaceSiding](https://www.retrofoam.com/hs-fs/hubfs/Images/Dennis_ReplaceSiding.jpg?width=1500&name=Dennis_ReplaceSiding.jpg) ** ** [Learn More About the Install Process](https://www.retrofoam.com/install-process) ## Get a More Comfortable and Energy Efficient Home in 3 Easy Steps ** ### Find a Local Dealer If it looks like you might be a good fit for RetroFoam insulation, search our dealer directory to find a dealer in your area.  ** ### Request a Quote From there, you can request a quote and connect with your local RetroFoam dealer to come up with a plan for your specific project. ** ### Love Your Home Love your home for the potential you always knew it had now that it is more comfortable and energy-efficient with RetroFoam. [Find a Dealer](https://www.retrofoam.com/dealers) [![150x100_RetroFoamCorporate_RegisteredLogo_RGB](https://www.retrofoam.com/hubfs/150x100_RetroFoamCorporate_RegisteredLogo_RGB.png) ](https://www.retrofoam.com) ##### [800-580-3626](tel:8005803626) ##### Injection Foam Insulation - [RetroFoam Insulation](https://www.retrofoam.com/injection-foam-insulation-existing-walls) - [RetroFoam Install Process](https://www.retrofoam.com/install-process) - [Find a Dealer](https://www.retrofoam.com/dealers) ##### Company - [Our Story](https://www.retrofoam.com/about) - [Become a Dealer](https://www.retrofoam.com/become-dealer) - [Dealer Portal](https://portal.retrofoam.com/) - [Contact Us](https://www.retrofoam.com/contact) ##### Resources - [Learning Center](https://www.retrofoam.com/blog) - [RetroFoam FAQ's](https://www.retrofoam.com/faq) - [RetroFoam Buying Guide](https://www.retrofoam.com/buying-retrofoam-insulation) [** ](https://www.facebook.com/RetroFoam) [** ](https://www.linkedin.com/company/retrofoam/posts/?feedView=all) [** ](https://www.youtube.com/channel/UCxsfFIgrOqqBRMFsjN-I3bg) © 2026 Polymaster. All Rights Reserved. [Privacy Policy](https://www.retrofoam.com/privacy-policy) | [Terms & Conditions](https://www.retrofoam.com/terms) *Retrofoam did a great job. We have noticed a big difference. - Donald Carey*