Serving the Knox County, TN area, RetroFoam of East Tennessee specializes in spray foam, RetroFoam, sound attenuation Insulation, attic, and crawlspace insulation. We offer free consultations, and all our work is guaranteed. As home weatherization specialists, why not schedule an office visit where we can show you a realistic wall sample of our products? We want you to be "in the know." Call or text us now!