At RetroFoam Iowa we Install the Best Insulation for Existing Homes! RetroFoam injected foam wall insulation saves you money on your energy bills. It also makes your home quieter and more comfortable. Injectable foam insulation seals even the smallest of openings in the walls of your house; which makes it an effective pest barrier. Fiberglass insulation is not as effective in stopping heat from escaping through the walls of your house. Foam insulation will fill the entire cavity between the wall studs and it will also stop the drafts around your electrical outlets and light switches. Injecting foam insulation into the wall cavities of your home is a relatively clean process. We will remove the least amount of house siding possible in order to install the non-expanding foam insulation. We will reinstall the pieces of siding after we are done insulating the wall. If you are planning to replace the siding on your home, you should also consider re-insulating it at the same time with RetroFoam injected foam wall insulation.